DHA 909 Questions

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1 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m

DHA Exam Questions

Important Notices

This Paper contains all the possible questions that will or most like come on the Dubai Health

Authority exam for Dentists. It’s important to understand that this is a reference source and it’s based on peoples experience and referred to some sources for verification none the less … we are human and we can do mistakes… but this is the best we can do – OziDent Team.

The correct answers contain the plus sign right to it +++

Authors

Edited by Dr. Mohsen S. Ozaibi (OziDent.com)

Contact

Please contact me at [email protected] for further information or correction Aslo visit our website

http://www.ozident.com

Good luck

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1) The body secretes antibody against antigen using which cells

- T lymphocyte - B lymphocyte++++

2) In diabetic patient , periodontium affected by which cells

- Neutrophils

- Macrophages++++

3) When taking an x-ray to pregnant lady we use all of this method except:

- digital x-ray - high sensitive film

- 16 inch / long cone / paralleling tech

- 8 inch / short cone / bisecting angle tech++++ - lead apron with thyroid collar

4) Best measurement of periodontitis by:

- pocket depth - bleeding

- attachment level++++

5) Proximal caries should be opened when

- confined within enamel - pass DE junction - dentine lateraly - all of the above++++

6) In a study, it should

- Protect you against role of the statistician - Protect you against legal risks++++ - Protect you against physical risks

7) Ethics of the study include all of the following except:

- privacy of all subjects

- informed consent may be required or not

- object if the subject refuse to take part of the study++++

8) In clinical research

- no difference between blind & double blind. - if there's need of intervention.++++

9) Pit and fissure sealant:

- -new erupted teeth

- -deep fissure and pits in molars - -proximal caries

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10) Ugly duckling stage:

- -9 to 11 years old++++ - -13 to 15 years old - -7 to 9 years old

11) Component of Gutta percha:

- -50% Gp & 50% ZOE

- -20% Gp & 70% ZOE++++ (Exact is 73%ZOE, 23% Gp, 4-6% others.)

12) All are irrigation for canals except:

- -NaOCl

- -RC prep++++ (RC Prep = EDTA)

13) For post preparation we should leave ……mm of GP:

- -10mm

- -5mm++++ (apical 1/3 of the obturated canal)

14) Enamel caries :

- outer zone free of….

- outer zone contain high pores

15) Proximal caries confined to enamel:

- prevention++++ - observation

- restore with G I++++

16) In community diagnosis and treatment program:

- water fluoridation

- diagnose, prevent, treat++++

17) Pass through parotid gland:

- facial nerve++++ - facial arteries

- external carotid veins

18) Porcelain shrinkage after firing:

- 1-5% - 5-10%

- 10-20%++++ (exactly 13.3%)

19) the cement under MOD amalgam have this character:

- high modulus of elasticity++++ - low modulus of elasticity

- the high modulus of elasticity prevent of bonding and decrease tensile strength. - both a &c

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20) Radiographic radioulucency in the interradicular area:

- invasion of furcation. (will be present with other clinical manifestations) - periodontal abcess (not enough radiolucent)

- periodontal cyst++++

21) Examination of pt health by the dentist:

- to know the patients health

- to know what medications to give - to know general health data - all of the above++++

22) Statements true or false:

- RCT abutment of FPD have higher risk for fracture.

- abutment which have RCT in cantilever FPD have higher susceptibility to fracture o 1st is true,2nd is false

o 1st is false,2nd is true o both are false

o both are true++++

23) Both glass ionomer & polycarpoxylate cement contain:

- polyacrylic acid++++ - ZO powder

24) Most frequent cause of fainting in dental office:

- vaso-vagal shock++++ - diabetes

- fear++++

25) Loss of consciousness most frequent cause:

- syncope++++

- CO2

26) Most common cyst in the oral cavity:

- radicular cyst++++ - peridontal cyst

27) Ostomylitis most in:

- maxilla

- mandible++++

28) Factors delay healing of wound:

- infection

- torn wound edges - strain

- poor suturing

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29) Dry socket happens after:

- 24 hours

- 3 to 5 days++++ - 1 week

- 2 weeks

30) Compared to herpetic ulcers... aphthous ulcers are:

- smaller in size

- in mucosal lining++++ - leave scars

31) In avulsion, most important factor that affect reimplantation :

- contaminated roots

- time since the avulsion++++

32) nicotine stomatitis:

an oral pathological condition that appears in the hard palate of the mouth as a white lesion. It is not considered to be premalignant and results from tobacco smoking (especially pipes or cigars. found in

men over 45 years of age, it is characterized as a "fissured" or "dried mud" appearance from excess keratin production by cells. The palate may appear gray or white and contain many papules that are slightly elevated with red in their center. Furthermore, the teeth may be stained brown or black

.

33) Dentinogenisis imperfecta have all signs except:

- broken enamel - blue sclera - broken bone

- supernumerary teeth++++

34) Most sign of fracture of mandible:

- nose bleeding - malocclusion++++ - parasthesia

35) Hairy tongue is elongation of:

- fungiform papilla - filiform papilla++++

36) What supply the gingival buccal tissue of premolars,canines and incisors:

- long buccal

- inferior alveolar nerve - superior alveolar nerve

- mental nerve <branch of IAN>++++

37) Drainage of tip of the tongue:

- submandibular lymph nodes - submental++++

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38) Cementum in cervical 2/3 have:

- acellular intrinsic fiber - acellular extrinsic fiber++++ - cellular mixed fibers

- intermediate cementum

39) Periodontal attachment contains:

- epithilum, sulcus, connective tissue++++

40) Pins are inserted into:

- Enamel - Dentin++++ - DEJ

- all

41) After etch enamel and bond it with 5th generation the strength of…… :

- 5-10Mp - 25Mp++++ - 30Mp - 100Mp 42) LA in mg if epinephrine 1:100 000 in 2% xylocaine: - 0.01 mg - 1.8 mg - 3.6mg++++ (Dental decks p.1870)

43) Composite restoration that was matching in shade ,after one week it became much lighter, The Reason could be:

- light started photoinitation - absorption water

- shade selected after rubber dam++++

44) Disadvantage of digital x-ray are all, except:

- large disk space Storage

- clarity and resolution++++ (ONE OF THE MAIN ADV’s of digital x-ray) - expensive

45) Treatment of fungal infections:

- Amphotrecine B (topical treatment) - tetracycline

- Flucnazole (Systemic treatment) - nystatin (topical treatment)

46) Properties of ideal endo obturation material are all except:

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47) Vibrating line :

- between hard & soft palate

- between mobile and non mobile soft tissue of palate++++

48) pt has hyperventilation in clinic most cause:

- reduced amt of CO2 - increase amt CO2 - anxiety++++

49) All relate to retention of maxillary complete denture except:

- tongue movement++++ - type of saliva

50) Most difficult of extract:

- mand. 3rd molar with mesioangular fused roots

- mand 3rd molar with distoangular angulation with divergent curve roots++++

51) Very important part in endo treatment:

- complete debridement of the canal++++

52) Perio endo lesion the primary treatment:

- endo treatment++++ (desck page 216) - deep scaling and root planning

53) Provisional luting cement:

- prevent restoration from dislodgement++ - -sealing++++

54) contra indication to extraction:

- cardiac pt

- previous recent radio therapy++++

55) base of the flap should be wide for:

- healing

- better blood supply to the wound++++

56) Supra calculus all true except:

- easy to detach

- has component of saliva++++

57) To prevent perio problem MOST effective method is:

- community program

- Frequent removal of plaque++++ - patient education

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58) thickness of luting cement

- 100 micrometer - 40 micrometer++++ - 1mm

59) formacresol used in:

- full concentration - 5th concentration - 1/5 concentration++++

60) zinc phosphate cement:

- mechanical attachment++++ - Chemical

61) Traditional Glass ionomer:

- mechanical bonding

- Mechanical chemical bonding ++++ - acid/base reaction

62) pontic design of an FPD:

- Same size buccolingually of the missing tooth - smaller than missing buccolingually++++ - wider buccolingually

- none of the above

63) Maryland bridge:

- use with young ++++

- to replace single missing tooth

64) false negative response of an electric pulp test given:

- after trauma ++++ - periodontal disease - in teenager

65) young with open apex examination test:

- reliable

- non reliable++++ - none of the above

66) primary teeth had trauma, tooth change in color become white yellowish ,what should u tell the parents:

- pulp is dead

- inflammation of pulp - calcification of dentin++++

Hemmoragic pulp : Reddish in color

Calcification / partial or complete obstructed canal : Yellowish

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67) best media for the avulsed tooth:

- milk++++ (the best media is the buccal sulcus of the same patient) - water

68) if enamel caries passing half of enamel:

- leave it

- restoration ++++

69) Biological depth:

- Crestal bone to gingival sulcus++++

70) Pt wearing denture 5 year ago came with white patches on lower ridge what is the best to be done:

- surgical removal of patches.

- tell pt stop wearing lower denture & recheck after2 weeks++++. - no treatment.

71) Glenoid fossa is found in:

- orbital cavity - nasal cavity

- middle cranial fossa - temporal bone++++

72) The spread of odontogenic infection is based on:

- host defense

- virulent of microorganism - No. of bacteria

- all++++

73) Knife ridge should be treated with :

- relining soft matiral++++ - maximum coverage of flange - wide occ. table

- all

74) AH26 composed of:

- ZOE - CaOH

- epoxy resin++++ - hydrogen peroxide

75) The splint period require for avulsed teeth:

- 6w - 8w

- 1-2 month

- None of the above (the maximum time to splint is 2 weeks) ++++

The glenoid fossa = the mandibular fossa.

The mandibular fossa: a depression in the temporal bone that articulates with the condyle of the mandible and is divided into two parts by a slit.

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76) child 3 years old came to clinic after falling on his chin, you found that the primary incisor entered the follicle for the permanant inicir what you will do

- surgical removal of the follicle - leave it

- surgicall removal of the primary incisor++++

77) tongue develope from:

- mandibular arch &toburclum impar++++ - 1st bronchial arch

78) isolated pocket in :

- vertical root fracture++++ - palato gingival groove - endo origin lesion - all

79) perforation during endo space preparation wht is the most surface of distal root of lower molar will have tendency of perforation:

- M SURFACE++++ - D

- B

80) crown and root perforation:

- respond to MTA

- use matrix with hydroxiapatite and seal with G I - 1&2++++

- root canal filling

81) 3rd generation of apex-locator:

- use with all pt - need more research - increase chair time

- decrease radiographic film need++++

82) Acceptable theory for dental pain:

- hydrodynamic++++ - fluid movement - direct transduction

83) Removing of dentine in dangerous zone to cementum is :

- perforation - ledge

- stripping++++ - zipping

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11 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 84) tracing of GP used for:

1/to detect source of oeriapical pathosis++++ (to follow the GP through the sinus tract in the x-ray) 2/acute periapical periodontitis

3/ periodental abscess 4/ non

85) occlusal splint device:

1/ used during increasing vertical dimension++++ 2/allative muscle of mastication

3/ occlusal plane CR/CO 4/ALL

86) silane coupling agent:

1/ used with porcelain to enhance wetability of bonding++++ 2/ used with tooth and porcaline

87) when increase vertical dimension you have to: 1/ increase minimal need

2/construct anterior teeth first thenposterior teeth 3/ use provisional crown for 2 months++++ 4/all

88) amalgam keep under: a fixer++++

b-developer c- water

89) the irrigation material used to kill the E.Faecalis bacteria: a-Na oH

b-MTA++++ c-saline

90) hand instrument which we used to make internal angle retentive groove and preparation of cavity wall in the cavity is:

a-angle former++++ (source : Art & Science) b-chisel

c-file

d-enamal hatched

91) What is the no of the pharyngeal arches? 1/ 6++++

92) To detect the occlusal plan which of the following used? 1/ Frankfort plan

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12 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 93) Streptococcus mutans cause caries & this disease is?

1/ eipdemic 2/endemic++++ 3/isolated

94) pt came to the clinic complaining from pain related to swelling on maxillary central incisor area with vital to under percussion?

1/ periapical cyst

2/incisive cyst( nasopalatin cyst)++++ 3/ globulomaxillary cyst

4/ anuyrsmal bone cyst

95) pt came to the clinic & u revealed under medical history he had chronic renal failure; he used to do hemodialysis the treatment should be:

1/ before one day of dialysis 2/ on the day of dialysis

3/ after one day of dialysis ++++ 4/ after one week of dialysis

96) pt taken heparins he should do surgery after : 1/ 1 Hr

2/ 2 Hr 3/ 4 Hr 4/ 6 Hr++++

97) Treacher – Collins syndrome is mainly: 1/ mandibular retrognathia ++++

2/ loss of hearing

98) the most common injures in child is: 1/ tooth ++++

2/ root

3/ intrusion of the tooth inside the socket well 99) The power tooth brush invented in:

1/ 1939 ++++ 2/ 1949 3/ 1929 4/ 1959

100) location to give inferior alveolar nerve block the landmarks are: 1/ ptergomandibular raphy

2/ cronoid notch

3/ all of the above ++++

Treacher Collins Syndrome is characterized by : 1. incomplete growth of mandible (retrognathic). 2. slinting of eyes corner.

3. Absent zygomatic arch / malar bone

4. malformed or absent ear auricles with weakened or (in 50%) loss of hearing.

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13 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 101) what kind of periodontal probe is used in the furcation area:

1/ WHO

2/ Nabers probe ++++ 3/ UNC 15

4/ Michigan

102) what kind of suture used under the immediate denture: 1/ horizontal matter suture

2/ vertical matter suture 3/ interrupted suture

4/ continous locked suture ++++

103) Ideal properties of RC filling material is the following except: a) Radiolucent in radiograph++++

b)Not irritate the surrounding tissue

c) Easily removable when retreatment is necessary d)Stable and less dimensional change after insertion

104) During instrumentation sudden disappear of root canal due to : a) Bifurcation of main canal ++++

b) Apical perforation c) Calcification

105) After examination of the tooth a)start local anesthesia

b)excavate the dentin

c)testing the tooth with the pulp tester++++

106) Incipient caries in the old patients is MOSTLY due to: a)smoking

b)saliva

c)xerostomia++++

107) The best restoration for the maxillary central incisor that has received root canal treatment through a conservative accsess opening would be:

a) post retained metal crow

b) post retained porcelain jacket crown c) composite resin++++

108) In post and core , it is important to:

a)end the core at contra bevel to produce ferrule effect b)end the core at the cervical finish line

c)the core take the same shape of a natural toorh d)the core take the same shape of prepared tooth - a only

- b&d - a&c -a&d++++

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14 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 109) Thickness of the porcelain in metal-ceramic restoration

a) 1.7 – 2.3mm b) 0.5 – 1.5 cm c) 0.2 mm

d) 0.05 – 0.15 cm (0.5 mm- 1.5mm)++++

110) Patient came to your clinic with dull pain in the #6 ,no response to the pulp tester, in radiographs it shows 3mm of radiolucency at the apex of the root Diagnosis is

a)chronic apical periodontitis++++ b) acute apical periodontitis

c)acute periodontitis with abscess 111) Composite for posterior teeth a) Macrofilled + fine filler

b) Hybrid + rough filler ++++

112) Pulp stone can be the following except: a) present freely in the pulp

b)cause discomfort & pain to the patient c)In radiographs,Small spheroidal radioopaque d)False stone occurs due to destrohpic dentin ++++ 113) The optic foramen canal is a part of:

a)Frontal bone

b)Sphenoid bone++++ c)Esthmoid bone

114) In growth, cartilages may give rise to bones: a)true++++

b)false

115) Adjustment of proximal contact with: a) Shim stock

b) Pencil

c) Dental floss++++ d) c &d

116) Best core material receiving a crown on molar a)amalgam++++

b)reinforced glass ionomer d)composite

117) Oral lesion of lichen planus usually appears as: a)white streaks++++

b)Red plaques

c)small shallow ulcers d)papillary projections e)bullae

Note:

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118) Radiographic diagnosis of bone destructive lesion in the mandible without evidence of bone formation is:

a)Osteomyelitis b)Malignancy++++ c)Fibro-osseous lesion d)Fracture

e)Osteoradionecrosis

119) Calculus induce further periodontal lesion due to: a) Directly stimulates inflammation

b)more plaque adhere to it++++ 120) Most coomon site to drain pus is: a) mandibular central incisors

b)mandibular canines

c) mandibular first molar ++++ 121) First of pharyngeal arch is: a)Maxilla

b)Mandible++++ c)hyoid

122) The nmber of pharyngeal arches is: a)One

b)Two c)three d)Six++++ e)Seven

123) The naso palatine bone forms a triangle will be parallel to an imaginary lines extended between cemento-enamel junctions of adjacent teeth

a)true++++ b)false

124) *Bross brushing has the advantage of the bristles enters in the cervical area . *It is recommended for all patients.

a)both statements are true b)both statements are false

c)first is true ,second is wrong++++ d)first is wrong , second is true

125) Chronic suppurative periodontitis a) Patient complains of moderate pain b) Fistula with pus discharge++++ c) Pulp polyp in open caries

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16 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 126) Complete denture poorly fit and inadequate interocclusal relation a) relining

b) rebasing

c) new denture ++++

127) The incisal guidance on the articulator a) same as condyler guidance

b) compensating for the overbite and overjet++++ c) compensating for curve of spee

128) The primary drainage(or spread of infection) of the mandible is the submental lymph node: a)true

b)false++++

129) Most common tooth which needs surgical extraction a)mandibualr third molar++++

130) The nerve which supply the tongue and which may be anesthetized during nerve block injection

a) V ++++ b) VII c) IX d) XII

131) when removing moist carious dentin which exposes the pulp , dentist should 1- do direct pulp cap (is done upon accidental exposure)

2- do indirect pulp cap (Very deep and close from pulp with Sclerotic/affected hard dentine) 3- prepare for endo ++++ (As long as there’s infection remaining)

132) In prevention of dental caries, the promotion of a healthy diet is: 1- low effective measure

2- moderately effective measure++++ 3- high effective measure

133) Treatment of cervical caries in old patients with a temporary restoration is best done by: a)Glass ionomer++++

b)composite resitn

134) Squamous cell carcinoma is a) multifactorial++++

135) Most used sugar substitute: a) Sorbitol

b) Mannitol c) Xylitol++++

Lingual Nerve branch of the Inferior Alveolar Nerve of the Trigeminal Nerve (Cranial V)

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17 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 136) Follow up of RCT after 3 years , RC failed best treatment is to: a) Extraction of the tooth

b) Redo the RCT++++ c) Apicectomy

137) Small access opening in upper central incisor in necrotic pulp leads to a) Complete removal of the pulp tissue

b) Incomplete removal of the pulp ++++ c) better Conservation

138) Class II amalgam restoration with deep caries the patient comes with localized pain related to it after 3 months due to:

a) pulp horn exposure b) over occlusion

c) moisture contamination during the restoration++++

139) Early Squamous cell carcinoma of the oral cavity presents as a) Vesicle

b) A sessile mass c) Red plaque

d) growing cauliflower like lesion ++++ <appearance of Sq. cell carcinoma>

140) In recording mand-max jaw relation, the best material used without producing pressure is: a) Wax

b) Compound

c) zinc oxide & eugenol paste ++++ 141) acute abscess is:

a) Cavity lined by epithelium b) Cavity containing blood cells c) Cavity containing pus cells ++++ d) Cavity containing fluid

142) The most close tooth to the maxillary sinus a)maxillary 1st , 2nd molar++++

b)maxillary bicuspids d) none of the above

143) 33 years old female patient. came with slow growing swelling in the angle of the mandible radiograph show radio-opaque with radiolucent border diagnosis

a) Osteoma

b) Osteosarcoma++++ c) Cementoblastoma

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144) Reliability of the measurements reflects that property of the measurements which a) Measures what is intended to be measured

b) Produces repeatedly the same result under a variety of conditions c) Detects reasonably small shifts, in either directions, in group condition d) All of the above++++

145) Balanced occlusion refers to

a) The type of occlusion which allows simultaneous contact of the teeth in centric occlusion only b) The type of occlusion which allows simultaneous contact of teeth in centric and eccentric jaw positions ++++

c) A type of occlusion which is similar to the occlusion of the natural teeth

146) In recent years there has been evidence that the prevalence and intensity of the caries attack has been diminished in the more economically developed countries mainly because of the widespread use of

a) Artificial water fluoridation++++ b) Fluoride tooth paste

c) Dental health education programs ++ (2nd most important)

d) Individualized oral hygiene instruction

147) In terms of caries prevention the most effective and the most cost effective method is a) Community based programs++++

b) Privately based programs c) Individually based programs

148) In countries with higher annual population growth rates, the need for community based preventive programs would be greater for

a) Dental caries ++++ b) Periodontal disease c) Dentofacial anomalies d) Dental fluorosis

149) Occlusal rest function:

a) To resist lateral chewing movement b) To resist vertical forces ++++ c) Stability

d) Retention

150) Which of the following may cause gingival enlargement a) Phenytoin (Dilantin) ++++

b) Cyclosporine c) Nifedipine d) Aspirin

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151) What is the best instrument used for removing unsupported enamel at the gingival wall of Class II

a) Chisel b) Hatchet

c) Gingival marginal trimmer ++++ 152) Dental caries

a) Is transmissible disease

b) Is worldwide in distribution but uneven in intensity c) Can be prevented

d) All of the above ++++ e) None of the above

153) Radiographic diagnosis of bilateral expansile radioopaque areas in the canine premolar area region of the mandible is

a) Hematoma b) Remaining roots

c) Torus mandibularis ++++ d) Internal oblique ridge e) Genial tubercle

154) Mandibular foramen in children in comparison with it in the adults a) Above the occlusal plane

b) Below the occlusal plane++++ (5 mm exactly below the occ. plane) c) anterior position

155) The choice of LA tech. depends on a) Diameter of nerve

b) Structure of bone ++++ c) Number of branches

d) Type of LA agent chemistry

156) Dental plaque is composed mainly of a) Bacteria ++++

b) Inorganic material c) Food

157) Management of tuberosity fracture during extraction of maxillary molar is a) Replace and suture (ONLY IF PERIOSTEUM IS PRESENT)

b) Remove and suture with primary healing (IF NO PERIOSTEUM TO AVOID NECROSIS) c) Replace and suture intra alveolar by wire++++

d) Remove and leave it to heal 158) the retainer of rubber dam

a) 4 points of contact 2 buccally and 2 lingually without rocking+++

b) 4 points of contact 2 buccally and 2 lingually above the height of contour c) 4 points of contact 2 mesially and 2 distally

d) 2 points

Note that the Tech. itself is dependant on the bone type (compact/cancellous).

while the type of the LA itself (with or without Adrenaline) is acc. to the patient systemic condition/health.

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20 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 159) In hairy tongue, which taste buds increase in Length:

a)Filiform++++ b)Fungi form c)Foliate

d)Circumvallates

160) the distal palatal termination of the maxillary complete denture base is dictated by the: a- tuberosity

b- fovae palatine c- maxillary tori d- vibrating line++++ e- posterior palatal seal

161) in registering the vertical dimension of occlusion for the edentulous pt, the physiological rest position:

a) is equal to the vertical dimension of occlusion

b) may be exceeded if the appearance of the pt is enhanced c) is of a little importance as it is subjected to variations

d) must always be greater than vertical dimension of occlusion++++ 162) Which of the following is a benign epithelial neoplasm?

a)Rhabdomyoma b)Keratoacanthoma++ d)Fibroma

c)Lipoma

d)Granular Cell tumor

163) To a great extent, the forces occurring through a removable partial denture can be widely distributed and minimized by the following methods:

a)proper location of the occlusal rests++++ b)selection of lingual bar major connector c)developing balanced occlusion

d) all of the above

164) The posterior seal in upper complete denture serves the following functions

a) It reduces the patient discomfort when contact occurs between the dorsum of the tongue and the posterior end of the denture base

b) Retention of the maxillary denture++++

c) It compensates for dimensional changes which occur in the denture base d) all of the above

165) In growth, cartilages may give rise to bones: a)true++++

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21 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 166) The most common fissural abnormality is

a) cleft palate

b) cleft lip (least common)

c) cleft lip& palate ++++ (most common & most complicated) (Source: Peterson’s page 841) 167) 7 years patient come with untreated trauma to tooth that became yellow in color what should you tell the parents

a) pulp is dead

b) pulp become calcified

c) the tooth will resorb normally -a and b

-a and c++++ -all of the above

168) Inferior orbital fissure located:

-Lateral wall of the orbit & floor of the orbit.++++

169) Provisional restoration for metal ceramic abutment is a) aluminum sheet

b) stainless steel crown c) ZnO

d) tooth colored polycarbonate crown++++

170) In hypertension patient the history is important to detect severity a) true++++

b) false

171) In 6 week intra-uterine life the development start. the oral epithelium is stratified squamous epithelium will thickened and give dental lamina

a) true++++ b) false

172) When take x ray in upper premolar to locate lingual root using mesial shift it will appear a) distal

b) buccal c) lingual d) mesial++++

173) A question about miswak:

use toothbrush after every meal and meswak before praying and if you out side home use meswak++++

174) Hypercementosis and ankylosis is seen in a) padget’s disease++++

b) monocytic fibrous dysplasia c) hyper-parathyroidism

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22 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 175) the infection will spread cervicaly in infection from

a) lower incisors b) lower premolars

c) lower 2nd and 3rd molars+++ d) upper incsisors

176) open bite is seen in a) lefort 2

b) unilateral condylar fracyure c) bilateral condylar fracture++++ 177) the first cervical vertebra is axis a) true

b) false++++ (it’s Atlas)

178) in intra uterine life the mandible start to develop but clavicle starts before it a) true++++

b) false

179) in maxillary upper 6, 4th canal is in

a) mesiobuccal++++ b) distobuccal c) mesio lingual d) lingual 180) osteoradionecrosis is more in a) maxilla b) mandible++++ c) no difference

181) in inflamed mucosa due to wearing denture, when to do new denture a) immediately

b) after week

c) put tissue conditioning material and wait until the tissue heal and take impression after++++ 182) schick intradermal test used in

a)Tuberclosis b)tyhpoid

c)diphtheria++++

183) twins came to your clinic during routine examination ,you found great change behavior between both of them this due to

a)hereditary b)environment c)maturation++++

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184) radioliucent lesion with scalloped border above inferior alveolar canal between roots of mandibular molars, this lesion is

a)solitary cyst

b)anyresmal bone cyst

c) traumatic bone cyst / simple bone cyst ++++

185) the use of low speed hand piece in removal of soft caries in child is better than high speed: a) less vibration

b) less pulp exposure++++ c) better than high speed

186) gingival conditions occur in young adult has good oral hygiene was weakened: a) ANUG++++

b) desqumative gigivitis c) periodontitis

d) gigivitis

187) healing after scaling : a) long junctional epithial ++++ b) new attachement

188) patient 6 years old came to your clinic after he had bicycle accident one day after,with swelling at his lower lip, clinical examination shows ,teeth didn’t hurt, what you will do a)x-ray ++++

b)endo for lower incisors c)pulpotomy

189) child 3 years old came to clinic after fallen on his chin, you found that the primary incisor entered the follicle for the permanant inicir what you will do

a)surgical removal of the follicle b)leave it

c)surgicall removal of the primary incisors++++

190) Slow growing cyst at the site of 26,27,28 28 is missing I don’t remember the answers but mostly <dentigerous cyst> 191) Dr.black (GV black) periodontal instrument classification: study what the number represent in the instrument formula >>>>> 192) HBV disinfection: (enough with intermediate disinfection) a) iodophores+++

b) dettol / 100% ethyl alcohol (all alcohols are not recommended) c) hypcloride, ethyl

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24 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 193) Dylantin (phynotoin) don’t give with :

b)azoles

c)metronidazole++++ d) all of the above

194) Pregnant 25 years, bleeding on probing, location on papilla of anterior area of the maxilla, isolated:

a)giant cell granuloma

b) pyogenic granuloma (pregnancy epulis)++++ c) giant cell granuloma

195) Porcelain, highly esthetic , anterior maxilla area, we choose: a) Dicor

b) in ceram++++ c)impress

196) the highest strength in porcelain: a) ZR (zircon) reinforced in ceram++++ 197) To check TMJ range of movement: a) cranial imagery

b) arthrography++++ (source : oxford dental hand book) c) traditional tomography

d) computerized tomography

198) Amalgam pain after restoration due to: a) phase 2 gamma

b) phase 1 gamma

c) zinc containing alloy++++ d) admix alloy

199) an adult had an accident, maxillary central incisors intruded, lip is painful with superficial wound what is the trauma’s classification:

a) luxation b) sublaxation c) laceration d) abrasion e) contusion.

200) Three year old pt, has anodontia (no teeth at all), what would you do: a) full denture ++++

b) implant

c) space maitainer d) no intervention

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201) when sharpening instruments, unmounted stone has an advantage over mounted stone: a) doesn’t change the shape of the cutting edge

b) easier to sterilize

c) eats less of the blade++++

remember: we use water with synthetic stones, and oil with natural stones 202) for root caries (class V) what’s the best restorative material:

a)composite resin b)G I ++++ c)Amalgam

203) after bleaching a tooth, we want to restore the tooth with composite resin, we don’t want to compromise the bonding, we wait for:

a) 24 hours

b) a week ++++ (ideal from 2-3 weeks : source “bleaching tech in resto. dentistry) c) choose a different material

204) Rubber dam is important because it: - improves safety++++

- looks scientific - Improves suction.

205) Yellow tooth after trauma for primary dentition: - hemorrhage of the pulp necrotic pulp

- calcifying degeneration of the pulp++++

206) Swelling in the side of the face after inferior nerve block injection , you injected in: - Facial artery’s branches or Parotid gland

207) The most superior Cold test for pulp: - ethyl chloride

- ice block++++ (cause it’s localized to one tooth only). - cold spray

208) study Ceramic crown preparation and depth of preparation - ceramic thickness: 1 - 1.5mm

- metal thickness: 0.5mm

- all ceramic thickness: 1.5- 2.0mm 209) Pregnant woman, prophylactic treatment: a) antibiotic++++

b) Corticosteroid c) GA, none d) None++++

Remember that gray color means : pulp necrosis in children.

Red color means : haemorrhage of the pulp

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210) Pt wants to extract his tooth but the diagnosis is RCT, he can’t afford the RCT, what’s you action: a) Ask him to go to another dentist

b) Give the advantage of keeping his tooth and how important it is and record his decision in his chart treat him as he wishes++++

c) Extract exactly

211) Root canal pathoses mostly :

a) anaerobic obligated ++++ (1ry lesion) b) aerobic

c) mixed

212) To take out a broken periodontal instrument from the gingival sulcus: a) Schwartz Periotrever ++++

213) when take x ray in upper premolar to locate lingual root using mesial shift it will appear a) distal

b) mesial++++ c) buccal d) lingual

214) tongue develope from:

a) mandibular arch &toburclum impar b) 1st bronchial arch

215) endocrine and exocrine gland is : a) pancreas++++

b) pittury gland c) thyroid gland d) salivary gland e) sweat gland

216) which is the most likely cause of periodontal cyst: a) cell rest of malsze

b) cell rest of serss

c) cell of hertwig sheath ++++

217) perforation during endo preparation what is the most surface of distal root of lower molar will have tendency of perforation:

a) Mesial Surface++++ b) Distal

c) Bucc d) Ling

218) isolated pocket in : -vertical root fracture++++ -palato gingival groove -endo origine lesion -all

Don’t forget that: SLOB rule means

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27 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 219) crown and root perforation:

1/ respond to MTA

2/ use matrix with hydroxiapatite and seal with G I 3/1&2++++

4/root canal filling

220) 3rd generation of apexo locator: 1/ use with all pt

2/ need more research 3/increase chair time

4/ decrease radiographic film need++++ 221) acceptable theory for dental pain : 1/hydrodynamic++++

2/fluid movement 3/ direct transduction

222) tracing of GP used for:

1/source of oeriapical pathosis++++ 2/acute periapical periodontitis 3/ periodental abscess

4/ none

223) occlusal splint device:

1/ used during increase vertical dimension++++ 2/allative muscle of mastication

3/ occlusal plane CR/CO 4/ALL

224) silane coupling agent:

1/ used with porcelain to enhance wetability of bonding++++ 2/ used with tooth and porcaline

225) when increase vertical dimansion you have to: 1/ increase minimal need

2/construct anterior teeth first thenposterior teeth 4/ use provisional crown for 2 months

5/all ++++

226) Arrange the steps

answer : [ca(OH)2 placing > varnish > base > amalgam] .

227) Radiolucent structure arround the roots of mandibular vital premolars -The mental foramen++++

228) Expensile radioopaque structure at canine/ premolar area -Torus mandibularis++++

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28 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 229) rigid palatal strap major connector the material of construction is -co-cr++++

-Gold ti -gold

-wrought wire

230) x-ray periapical for immature tooth is -generally conculosive

-simply inconculosive++++

-should be compered with antermere 231) prophylactic antibiotic needed in -anathesia not interaligamentary -suture removal

-rotuine tooth brushing -orthodontic band++++

232) >Soft palate falls abrubtly facilitates recording post dam. >Soft palate falls gradually makes recording post dam difficult. a) two statement true.

b) two false.++++

c) first true ,second false. d) first false,second true.

233) prograssion of intial caries to cavatation takes 18 month this based on a) streptococcus mutans inatiate caries++++

b) lactobacillia progress caries

234) caries progress in childern more than adult due to a) differance in pH

b) generalized dentin scalerosing by age++++

c) increasing in organic content of tubular dentin by age 235) post length increasing will

a) increase retention ++++ b) increase resistant

c) increase strength of restoration

236) the following is true about periapical lesions:

a) When the source of irritation is removed healing in periapical area is good++++ 237) osteogensis during endodontic surgery / root re-sectioning is aimed to prevent a) fibrous in growth++++

b) growth factor c) Formation of blood

Note:

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238) 60 YEARS old patient need to make complete denture with thick labial freanum with wide base the operation

a) vestibuloplasty++++

b) z-plasty (if narrow base frenum) c) subperiostum incision

d) deepmucoperiostum incision

239) child patient take sedation before appointment and present with physical vault what should dentist do

a) constious sedation b) redo sedation ++++ c) tie with baboose board d) tie in unit with bandage ++

240) class iii crown fracture in child patient the type of pontic a) ovate ++++

b) egg shaped c) hygienic d) ridge lap

241) lesion at junction between hard and soft palate and surrounded with psudoepithelium a) hyperplasia in salivary gland

b) necrotizing sialometaplasia++++

242) conditioning material of resected root a) citric acid ++++

b) phosphoric acid c) H2O2

d) EDTA

243) long tooth crown is managed by all of the following except a) easily intruded orthodontically++++

244) the needle holder used in suturing of lower third molar a) curved haemostat++++

b) allis forceps c) Adson forceps

245) the structure of dye material is a) propylene glycoal base++++

246) principle of elevator use of all the following except a) wheel and axle++++

247) protocol of sterilization

a) intial cleaning - inspection - clean - steralization - storage++++ b) inspection-clean-sterilization-store

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248) hand instrument which we used to make internal angles retentive grooves and preparation of cavity walls in the cavity is

a) angle former++++ b) chisel

c) file

d) enamel hatched

249) amount of daily wear of amalgam ingested in the body a) 3-4 Microgram/ day

b) 1-3 microgram / day++++ 250) amalgam keep under

- fixer+++ (it should be expired diluted fixer solution). - developer

- water

251) arrange the steps of cleft palate management a) measures to adjust speech

b) establish way for nursing and feeding c) cosmetic closure

d) prevent collapse of two halves Answer : b > d > a > c

252) instrument used to handle the needle

a) curved haemostat++++ (or normal haemostat or needle holder) b) addison forceps

c) allis forceps

253) root canal irrigant used to kill E.feacalis a) NaoH

b) MTA++++ c) saline

254) oral surgeon put his finger on the nose of the patient and the patient asked to blow this done to check

a) anterior extention of posterior palatal seal b) lateral extension of posterior palatal seal

c) posterior extension of posterior palatal seal++++ d) glandular opening

255) patient with new amalgam restoration usually complains of pain with a) cold++++

b) galvanic c) hot

Note:

Addson Forceps <> soft tissue forceps (toothed / soft) to hold soft tissue , flaps …etc.

Allis Forceps <> to hold intact orruptured cyst during removal & to remove epulis fissuratum.

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31 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 256) testing a tooth with porcelain fused to metal with

a) cold test b) cold and hot c) cold

d) cold and hot

e) cold with rubber dam++++

257) cost effective method to prevent dental caries a) water fluoridation++++

b) flouridated tooth past 258) antifungal drug a) nystatin++++

259) sharping of hand instrument mounted air driven better than unmounted due to a) fine grift++++

b) sterilization

c) ability to curve instrument 260) die ditching means

a) carving apical to finish line++++ b)carving coronal to finish line c) mark finish line with pen

261) instrument which we use to make groove in the wax is a) carver

262) hot oven relative to to autoclave a) the same time

b) slightly higher time

c) considerable higher time++++ d) lower time

263) bronchial asthma epinephrine concentration subcutaneously a) 1/1000++++

b) 1/10000 c) 1/100000

264) patient with leukemia Neutrophilic Count (ANC) is 1700 what oral surgeon should do a) go on the maneuver

b) postpone another day

c) work with prophylactic antibiotic ++++ d) platelets transfusion

Note:

Hot Dry Oven : 160° <> 2 hours 200° <> 1 hour.

Autoclave : 127° <> 15-25 minutes 134° <> 3-5 minutes.

Note:

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32 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 265) pain of short duration with hot and cold

a) dentin sensitivity ++++ b) irreversible pulpitis c) chronic pulpitis d) apical periodontitis 266) cyst in x- ray

a) radiolucent with bone expansion++++ b) radiolucent with bone resorption

267) pt. presented after insetion of complete denture complaining of dysphagia and ulcers what is the cause of dysphagia

a) over extended ++++ b) over postdammed c) under extended d) under postdammed

268) color of normal gingiva in interplay between :

a) Keratin, b. vessels, melanin and epithelial thickness ++++

269) To select the shade of a tooth from a shade guide:

- Under light - Dry tooth

- None of above++++

270) black pt. came seeking for white teeth what should dentist do:

- Show photos of other pt’s ++++ - Do not show white teeth

- Tell him firmly that these teeth are good

271) progression of initial caries to cavatation takes 18 month this based on

- strepto.mutans inatiate caries++++ - lactobacillia progress caries

272) the vertical fracture of the tooth detected by

- periodontal pocket (not conclusive)

- radiographically++++ (appears as a J-shaped lesion along the root affected) - vertical percussion (not conclusive)

273) cost effective method to prevent dental caries

- water fluoridation++++ - flouridated tooth paste

274) Amalgam restoration and there is also gold restoration in the mouth what should dentist do?

a) change restoration ++++ b) put separating medium c) wait

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33 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 275) the temperature of melting gutta percha

a) 70 -160++++

276) for preparation reduction for functional cusp is : a) 1.5mm

b) 2 mm++++

277) Pt came after 24 month of tooth replantation which had ankylosis with no root resorption it most likely to develop root resorption in:

a) reduce greatly ++++ b) increase

c) after 2 years d) after 4 years

278) Child with vesicle on the hard palate with history of malaise for 3 days what is the possible diagnosis:

a) herpes simplex ++++ (OR Herpes Zoster) b) erythema multiform

279) 5 years old pt had extraction of the lower primary molar & he had fracture of the apex of the tooth what is the best treatment :

a) aggressive remove b) visualization & remove c) visualization & leave ++++

280) 7 y/o boy came to the clinic in the right maxillary central incisor with large pulp exposure: a) pulpectomy with Ca(OH)2

b) pulptomy with Ca(OH)2 ++++

c) Direct pulp capping d) leave it

281) 30 years old pt came to the clinic with brownish discoloration of all his teeth (intrinsic discoloration) & yellowish in U/V light the most likely cause is:

a) flourosis

b) tetracycline ++++ c) amelogensis imperfecta d) dentogensis imperfecta

282) Pt came to the clinic complaining from soreness in the tongue sore throat the diagnosis is: a) burning mouth syndrome ++++

b) geographical tongue c) fissure tongue

283) Mucoceles the best ttt is: a) Excisional ++++

b) leave it

c) marspuilization (For Ranula Only) d) cauterization

Pulpotomy/ Apexogenesis: in case of healthy pulp tiss. / small exposure.

Pulpectomy: in case of infected pulp / Large exposure.

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34 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 284) The most common professional use of flourid in peado are:

a) Acidulated phosphate flouride (APF)++++ 285) wax properties are:

a) expansion

b) internal stress++++

286) old pt came to replace all old amalgam filling he had sever Occlusal attrition the best replacement is:

a) composite b) amalgam

c) cast metal restoration d) full crowns++++

287) Teenager boy with occlusal wear the best treatment is: a) remove the occlusal

b) teeth capping ++++ c) restoration

288) baby born without which bacteria: a) Streptococcus mutans++++

289) avulsed tooth: a) splint 7-14 day ++++ b) 3- 14 weeks

290) difference between gracy curette & universal curette:

- Cross section in Gracey is semicircular and in universal is triangular. - Gracey has one cutting edge while universal has two cutting edges.

- Gracey has a certain site to work on per instrument, while universal can be applied any where - in the dentition

- Gracey has offset of 60°, while universal has offset of 90° - All of the above.

- b, c, d++++

291) Acute periapical abscess & acute periodontal abscess are differentiated by: a) vitality test ++++

292) Mobility of the midface bilateral in frontozygomatic suture: a) lefort III ++++

293) Etching dentine is : a) 15 sec ++++

294) Polishing bur have: a) more than 12 blade ++++

APF : Na2F / Stannous Flouride in

an acidic medium of Phosph. Acid. PH : 3/4

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35 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 295) rampant caries in adult in anterior teeth restore by:

a) GIC ++++

296) best provisional restoration coverage for anterior teeth is: a) tooth colored poly carbonate crown++++

297) disinfection of gutta p :

a) chemical solution ++++ (chlorohexidine &/or NaOCl) Page | 38

298) during post removal the first thing to do is: a) remove the G.P

b) remove all the old restoration & undermined enamel & caries ++++ c) insertion of post immediately

299) Young pt complete the orthodontic treatment. Upon removal we found white spot in ant. Teeth. how to restore

a) microscalar then fluoride application++++ (Prevention) b) composite veneer.

300) Epliptic pt should not take which drug a) aspirin

b) metronidazole ++++

301) Pt came with small trauma of the lower lip & discoloration of his tooth what is the name of this condition

a) abrasion & subluxation

b) laceration & subluxation ++++

302) Young pt came without any complain during routine X ray appear between the two lower molar lesion diameter about 2mm & extend laterally with irreg. shape what’s the type of cyst a) dentigerous cyst++++

b) apical cyst c) radicular cyst

303) Pt had generalized lymphoadenopathy. the diagnosis is? a) infection +

b) HIV ++++

304) Nitrous oxide effect to? a) vit A

b) vit B6

c) vit B12++++

305) Defect factor VIII is which kind of hemophilia? a) Hemophilia A++++ (defect factor 9 : hemophilia B)

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306) It has been proven that amalgam restoration has the following characteristics - Micro leakage decrease with aging of the amalgam

- It is the least technique sensitive of all current direct restoration - High dimensional changes

Choose the appropriate answer: - 1,2 & 3

- 1 & 3 - 1 & 2++++ - 2 only

307) To distinguish periapical and periodontal abscess we use a) X-ray examination

b) Clinical examination c) Vitality of the pulp++++

308) Single rooted anterior teeth needs endodontic treatment which is best treated by: a) Casted post & core. ++++

b) Preformed/ Prefabricated post & composite. c) Preformed post & amalgam.

d) Composite post & core.

309) Squamos cell carcinoma is a malignant from a)skin

b)mucous membrane c)glandular tissue

d)mucous epithelial membrane++++

310) The antibiotic of choice in endodontics a) Metronidazoles

b) Penicillin &…. ++++ c) Tetracycline

4)Erythromycins

311) Selection of shade for composite is done: a) before preparation++++

b) we must rest the eye by looking to a yellow color. c) we must look to the tooth only 5 sec++++

312) Commonly, after placement of amalgam restoration pt. complain from pain when eating a) Hot

b) Cold++++ c) sweet

313) Irrigation solution for RCT ,when there is infection and drainng from the canal is a) Sodium hypochlorite

b) Iodine potassium

c) sodium hypochlorite and iodine potassium ++++

To rest the eyes, NEVER YELLOW, but high contrast colour : Ex. Blue/green “towel of the patient”

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37 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 314) Time of curing of dentin

a) 10 secs b) 15 secs c) 30 secs ++++ d) 60 secs

315) Squamous cell carcinoma is a) multifactorial ++++

316) If tooth or root is pushed during surgical extraction into maxillary sinus a) Leave it and inform the patient

b) Remove it as soon as possible ++++ c) Follow the patient for 3 months d) None of the above

317) for discharged sharp instrument (blades, needle tips, wedges, …etc) put in : a) dicharged paper basket

b) disgned sharp instrument special container++++ c) disinfectant in auto glave then throw

d) put it in multifoil

318) what is the time bet. the first onset of HIV virus and the appearance of acute symptoms : a) 1-5 years

b) 9-11 years++++

c) no specific time is known d) above 10 years

319) why the moisture heat sterilization is better than dry heat sterilization a) makes the instruments less rusty and blunt

b) needs more time and affects the proteins of the cell membrane c) needs less time and affects the proteins of the cell membrane++++ 320) Periodontal ligament fibers in the middle third of the root is a) Oblique++++ (most of the PDL fibers)

b) Horizontal c) Trans-septal

321) Autoclave relative to 100f dry oven a)the same time

b)slightly higher time c)considerable higher time d)less time++++

322) pt came after few days from insertion complete denture ,there is no complain ,except the sound specially letter he say it like (v), the reason is ?

a)the anterior upper teeth are upward from the lip line++++ b)the anterior upper teeth forward from the lip line

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323) father for child 12 year patient, asked you about the age for the amalgam restoration of his child, you tell him:

a)2 years b)9 years

c)2 decades++++ d)all life

324) pt have unilateral fracture of left the condyle the mandible will a)deviate to the left side++++

b)deviate to the right side c)no deviation

325) pt have a complete denture came to the clinic ,tell you no complaint in the talking ,or in the chewing ,but when you exam him ,you see the upper lip like too long ,deficient in the margins of the lip, reason is

a)deficiency in the vertical dimensional b)anterior upper teeth are short++++ c)deficiect in vit B

326) pt with complete denture come to your clinic ,complaining from his dry mouth ,the proper medicine is

a)anti diabetic medicine b)anticordial ++++ c)steroids

327) reduction in the incisal edge for metal porcelain crown is a)1mm

b)1.5mm c)2mm++++ d)4mm

328) for 3 years child, the toothpaste with fluoride for him is a)recommend++++

b)not useful c)toxicity

d)must not be used

329) 4 year child come to restore his lower, first molar with destruction in 3to 4 surfaces ,the best restoration

a)amalgam

b)full porcelain crown c)full metal crown++++ d)extraction

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330) female come need to endodontics for central incisal ,and have compsite restorations in the mesial and distal walls ,and have attrition in the incisal edge the best restoration?

a)jacket crown b)full crown++++ c)metal cown

331) child 10 years came with trauma on the center incisor from year ago ,and have dis

coloring on it , in the examination ,no vitality in this tooth ,and in the x ray there is fracture from the edge of the incisal to the pulp ,and wide open apex the best treatment ?

a)calcification++++ b)RCT with gutta percha c)extraction

d)capping

332) pt with hepatitis B, the best sterilization is - formaldehyde

- detol+100%alkohol - iodophores ++++

- a&b ++++ - a&b&c

333) the best core material in the anterior teeth is? a)composite++++ (Casted P & C is better)

334) how can you alter the sitting time for alginate a)alter ratio powder water++++

b)alter water ratio c)we can’t alter it

d)by accelerated addition

335) application of rubber dam in the endodontics a) necessary

b)patient comfort c)established rule ++++ d)extra cost

336) amalgam restoration with post & core in the posterior teeth decide by a)canal curvature

b)canal length and diameter

c)Amount of crown destruction++++

337) Female patient came to your clinic with continous severe pain related to 1st maxillary

molar. After examination dentist diagnose the tooth is carious and has irreversible pulpitis. He decides to do RCT. After enough time for anaesthisation, the patient won’t allow the dentist to touch the tooth due to severe pain. Dentist should:

a) give another appointment to the patient with description of antibiotics.++++ b) Extraction.

c)Intra-pulpal anaesthia.

To increase Alginate setting time: 1. Use cold water & spatula. 2. Increase water <increase water/powder ratio).

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338) 32 years old patient came to your dental office, suffering from a bad odour and taste from his mouth. By examination patient has an anterior mandibular 3 unit bridge that bubbles upon applying water spray and slight pressure. Cause:

a) broken abutment.

b) Food impaction underneath the pontic.

c) separation between the abutment and the retainer.++++ (dissolving of cement / microleakage) 339) What’s the name of the Device used to measure the Vertical Dimension

a) caliper++++ b) face bow

340) Patient complaining from pain in the floor of the mouth (beneath the lower jaw) your diagnosis is related to the salivary glands, what’s the best x-ray to help you:

a)panoramic b)occlusal

c)sialograph++++ (Specialized radiograph for the Salivary gland disorders) 341) what is the foreceps to remove epulis fissaratum:

a) allis++++ b) adison

342) distal surface for first upper premolar ,contact with the neighbor teeth : a)in the middle with buccal vastness wider than lingual one

b)in the middle with lingual vastness wider than bucccaly one++++

343) preparation for labial surface in one plane in the preparation for metal crown is: a)more retentive

b) less retentive ++++ c)…..

d)…..

344) the movement of polymorphic cells in the gaps of intracellular to the blood capillary outside it called:

a)porosity b)slinking

c) diapedesis++++ (source Wikipedia)

345) Patient suffering from pain in the area of the mandibular molars with parasthesia in the lower lip. By clinical and radiographic examination your diagnosis:

a) Acute osteomylitis++++

346) What is the dominant type of fibers found in Cementum: a) longitudinal

b) Circular

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41 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 347) What is the main function of impression tray holes :

a)Fixing the Impression material++++

348) A Tailor is presented to your dental office, what’s the most common feature to be found in his teeth upon examination :

a)Attrition

b) abrasion ++++ c) Erosion

d) Abfarcation

349) what’s the first sign of Syncope a) Paleness++++

b) nose bleeding (epistaxis) c) Miosis

350) upon giving a lower mandible anaesthia, you notice the patient’s eye, cheek corner of the lip are uncontrolled , what’s the reason :

a)Parasthia of the Facial Nerve +++

351) What’s the reason of the wax shrinkage upon fabrication of the bridge/crown : 352) Upon opening an incision in a periapical abscess in a lower 1st molar, you open :

a) The most bottom of the abscess ++++ (for continous evacuation of pus through the drain b) The most necrotic part of the abscess ++++ (the most fluctuant part of the abscess) c) Extra oral

353) Patient came to your clinic complaining of pain, upon examination you can’t find a clue. What’s the next logical step to do in investigation

a) Panoramic x-ray++++ b) CT Scan

c) MRI

d) Regular tomography

354) What’s the best implant type allowing Osseointegration: a) Root-form Endosseous implant.++++

379) what medical condition should prevent the dentist from practicing dentistry : a) Diabetes

b) Hypertension c) Influenza++++ d) Headache

380) where does the breakdown of Lidocaine occurs : a) kidneys

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42 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 381) patient complaining of Xerostomia & frequent going to the toilet at night a) Diabetes Mellitus++++

382) what is the most factor encouraging dental caries : a) Xerostomia++++

b) Hypocalcification c) Smoking

383) what is the type of sterizliation applied on ligation/fixation wires a) Autoclave++++

384) child suffering a trauma resulting in a complete avulsion. The more successful is when : a) immediate++++

b) after 24 hours

385) a child at dentation age is suffering from : a) diahrrea

b) sleep disorders

c) increased salivation++++

386) which of the following materials is NOT a hemostatic agent : a) Oxidized cellulose

b) Gelvon

c) Zinc Oxide++++ 387) time of PT, PTT :

a)11-15 seconds , 25-40 seconds++++

388) For cavity class II amalgam restoration in a second maxillary premolar, the best matrix to be used:

a) Tofflemire matrix++++ b) Mylar matrix

c) Gold matrix d) Celluloid strips

389) A completely edentoulus patient, the dentist delivers a denture in the 1st day normally, 2nd day

the patient returns unable to wear the denture again, the cause is : a) Lack of Skill of the patient ++++

b) Lack of Frenum areas of the Complete denture.

390) for a newly erupted tooth, the most bacteria found around the tooth is : a) Streptococcus mutans++++

b) Streptococcus salivaris

391) generalized gray discoloration in a 28 years old patient’s teeth, with blue sclera and an enlarged pulp chambers and short roots, and multiple fractures in Enamel… the diagnosis is : a) Dentinogenesis Imperfecta++++

(43)

392) For a patient that is on a corticosteroid therapy, upon oral surgery, the patient is given : a) 100 - 200 mg hydrocortisone++++

b) 400 - 600 mg prednisolone

393) an 8 years old child, suffered a trauma at the TMJ region as enfant. Complaining now from limitation in movement of the mandible. Diagnosis is :

a) Sub luxation b) Ankylosis++++

394) Removal of Undermined Enamel in Class II cavity is done by : a) Chisel ++++

b) Angle former c) Excavator

395) The least effective method to kill the HIV is through a) NaOCl

b) Autoclave c) Chemiclave

d) Ultraviolet chamber++++

396) instrument used to catch the flap (soft tissue) when we do impaction in lower third molar : a) Addison forceps++++

b) Allis forceps c) Curved hemostat d) Regular tweezer

397) The outline form of upper maxillary molar access opening is Triangular, The base of this triangle is directed toward :

a) Buccal++++ b) Palatal c) Mesial d) Distal

398) patient suffering from a submandibular gland abscess, dentist made a stab incision and is fixing a rubber drain to evacuate the pus, the drain is sutured to :

a) Intra-oral

b) From angle of the mandible++++ c) Between myloid muscle and…..

399) The best material for taking full crown veneers impression is : a) Poly-sulphide

b) Poly-ether c) Irreversible

d) Poly vinyl siloxane (Additional silicone) ++++

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400) Patient came to your office suffering from paing in upper second premolar… after x-ray you found the tooth had a failure in RCT obturated with Silver cones. What is the most suitable method to remove the silver cone :

a) Hatchet

b) Steiglitz pliers++++ c) Ultrasonic tips+++ d) H files++

401) what is the concept of Pro-taper system : a) Step down tech.

b) Step back tech.

c) Crown down tech. ++++

402) after patient came to your clinic and gave an extended history and complain, what’s your next step in treatment :

a) Clinical examination++++ b) Start the treatment

c) Radiographic examination

403) method of Detection of Cracked teeth : a) Horizontal percussion

b) Vertical percussion c) Electric pulp test

d) Transillumination / visible light test.++++

404) Patient suffering from a cracked enamel, his chief complain is pain on : a) Hot stimuli

b) Cold stimuli c) A & B++++ d) Electric test.

405) cause that master cone not reaching working length: a)ledge

b)blockage by debris++++

406) Preparation of tooth for metal ceramic restoration should be done in: a) two planes++++++

a) parallel to long axis

407) Pt presented with vehicle accident u suspect presence of bilateral condylar fracture what is the best view to diagnose cond. Fracture:

a) occiptomenatal a) reverse towne’s ++++ c) p/a

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45 | P a g e A l l R i g h t s R e s e r v e d 2 0 1 3 | O z i D e n t . c o m 408) When extracting all max teeth the correct order is:

a) 87654321++++ b) 87542163 c) 12345678

409) Trauma caused fracture of the root at junc. Between middle and cervical third: a) do endo for coronal part only

b) RCT for both c) leave

d) extraction++++

410) when removing lower second molar : a) occlusal plane perpendicular To the floor b) buccolingual direction to dilate socket+++++ c) mesial then lingual

411) after u did RCT to your pt he came back to the clinic after few days with severe pain on biting, you did x-ray and it revealed that the RCT filling is very good, but u saw radiopaqe, thin (film like) spot on the lateral border of the root

what is the most probable diagnosis,sn a) Accessory canal

b) vertical root canal fracture++++

412) What is the disavdantages of Mcspadden technique in obturation ANSWER :

Use of speed higher than recommendedpoor seal. Extrusion of the filling material.

Fracture of thermocompactor. Gouging of the canal wall.

Inability to use the technique in curved canals.

Heat generation may lead to PDL damage, resorption and ankylosis.. Voids in final filling

all of these are correct, either of them will come as one of the choices.(Source: different textbooks) 413) Pt. presented after insertion of complete denture complaining of dysphagia and ulcers

what is the cause of dysphagia? a) over extended++++

b) over postdammed c) under extended d) under postdammed

414) Trauma lead to fracture in the root between middle cervical apical third a) poor prognosis++++

b) good prognosis

415) The best material for taking impression for full veneer crowns: a) polyvinyl sialoxane (additional Silicone)++++