Femoral stems
Characterisation of the surface topography, tomography and chemistry of fretting corrosion product found on retrieved polished femoral stems
... The femoral component was cemented with either a plain PMMA bone cement or antibiotic cement containing either the Gentamicin antibiotic or Erythromycin and ...fixed femoral stems was frequently ...
31
The role of surface pre-treatment on the microstructure, corrosion and fretting corrosion of cemented femoral stems
... To evaluate the mechanically enhanced corrosion mechanisms at the stem-cement interfaces a tribocorrosion test apparatus and procedure was develop and conducted in part reference to ISO 7206-4. Full details of the ...
42
Mid-term progressive loosening of hydroxyapatite-coated femoral stems paired with a metal-on-metal bearing
... We found the presence and observed severity of taper corrosion to be associated with aseptic loosening of HA- coated femoral stems in a relatively small number of samples. The predominant mechanism of taper ...
8
Survivorships of Small Cementless Femoral Stems are Similar to Mid-Size Stems. A Case-Control Study on Four Hundred and Twenty Total Hip Arthroplasties
... small femoral stems (8 to 10) compared to mid-size stems (11 to 13) ...small stems (exposed group) to standard mid-size stems (control group) ...
6
Cemented compared to uncemented femoral stems in total hip replacement for displaced femoral neck fractures in the elderly: study protocol for a single blinded, randomized controlled trial (CHANCE trial)
... displaced femoral neck fracture (FNF) [1, ...uncemented stems in hip arthroplasty for patients with a FNF have almost consistently favoured cemented fixation, mainly because of greater deterioration in ...
5
Galvanically enhanced fretting-crevice corrosion of cemented femoral stems
... Ultima femoral head, 28mm high CoCrMo Ultima acetabular liner and a Ti – 6Al-4V cementless acetabular shell that ranged from 48mm – 68mm in ...tapered femoral stems generally have a good survivorship ...
28
Non contemporaneous bilateral stem fractures occurring after staged bilateral hip revision using extensively porous coated cylindrical femoral stems: a case report
... of femoral bone loss [1] suggests that when type II bone loss is encountered, placement of an extensively porous-coated cylindrical stem is ...cylindrical femoral stems are reliable when used to ...
5
The use of 3D surface analysis techniques to investigate the wear of matt surface finish femoral stems in total hip replacement
... polished stems with the collarless double taper design subside into the bone cement after implantation, settling to produce good long-term in vivo ...implant stems which are preheated to ...
222
Finite element analysis of cementless femoral stems based on mid and long term radiological evaluation
... We conducted a retrospective study in 41 patients (48 hips) who underwent THA and bipolar hemiarthroplasty with either Citation (Stryker, Tokyo, Japan) (Fig. 1a) or Spongiosa (Zimmer, Warsaw, IN, USA) (Fig. 1b) pros- ...
10
Stress analysis of femur and femoral stems for hip arthroplasty
... Hip problem is getting more and more common nowadays. According to Cristofolini (1997), there are approximately 800,000 total hip replacements (THR) being performed around the world every year. In Malaysia, for past four ...
22
Assessment of retention force and bone apposition in two differently coated femoral stems after 6 months of loading in a goat model
... There are methodological limitations in the present study. The outer geometry of the two stems and the sur- face of the grooves differ, and as such, they are not im- mediately comparable. However, the surface area ...
8
Interface micromotion failure simulation of cementless hip prosthesis
... hip stems are loosening and thigh pain; both are attributed to the relative motion at the bone-implant interface due to failure to achieve sufficient primary ...hip stems’ stability are therefore crucial to ...
22
Failure analysis of cemented metal-on-metal total hip replacements from a single centre cohort
... The femoral component was cemented with either a plain PMMA bone cement or antibiotic cement containing either the Gentamicin antibiotic or Erythromycin and ...fixed femoral stems was frequently ...
13
Proximal femoral anatomy and collared stems in hip arthroplasty: is a single collar size sufficient?
... The main strengths of this study are its relatively large sample size (204 hips) and the accurate acquisition of CT-scans in a true frontal view. This study has several limitations related to the population studied and ...
7
Anatomical and Functional Preliminary Results of Total Non Cemented Hip Prostheses
... the femoral stem showed that in our series there is a cortical hypertrophy with a type of stress shielding at the end of the stem only 5% of the cases, which is less than what one finds in the ...the ...
8
Short uncemented stems allow greater femoral flexibility and may reduce peri-prosthetic fracture risk: a dry bone and cadaveric study
... Short femoral stems for uncemented total hip arthroplasty (THA) have been introduced widely, with the suggestion that they may facilitate easier revision [1], distribute stress anatomically [2] and cause ...
7
Mechanical properties of blueberry stems
... plant stems for the tensile tests were collected during the harvesting period, ...plant stems were collected from Farm Marjasoo whose blueberry plantation has been established on depleted peat milling ...
7
Perspectives on metaphyseal conservative stems
... bone-stock-preserving stems are analyzed on the basis of the available literature and our personal ...Metha stems represent, under certain aspects, a design evolution starting from shared concepts: reduced ...
6
The elastic modulus for maize stems
... Maize stems are composed of three primary tissue types shown in Fig. 1: (1) dermal tissue or “rind” as a strong protective surface layer; (2) ground tissue (pith), which is softer and makes up the largest fraction ...
12
Original Article Study of Branching Pattern and Surgical Anatomy of Femoral Artery
... The femoral artery is the continuation of external iliac ...the femoral triangle, enter and passes through the adductor canal, and becomes the popliteal artery as it passes through an opening in adductor ...
8