Iliopsoas Impingement on the Acetabular Component: Radiologic and Computed Tomography Findings of a Rare Hip Prosthesis Complication in Eight Cases

2003 ◽  
Vol 27 (2) ◽  
pp. 183-188 ◽  
Author(s):  
Catherine Cyteval ◽  
M. Pierre Sarrabère ◽  
Alain Cottin ◽  
Chahine Assi ◽  
Leila Morcos ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Acetabular Component ◽  
Hip Prosthesis

Wear Failure Analysis of UHMWPE Acetabular Cups in THR

2019 ◽  
Vol 957 ◽  
pp. 417-426
Author(s):  
Corneliu Nicolae Druga ◽  
Ileana Constanta Rosca ◽  
Radu Necula
Keyword(s):  
Femoral Component ◽  
Total Hip Replacement ◽  
Acetabular Component ◽  
Hip Replacement ◽  
Hip Prosthesis ◽  
Polyethylene Wear ◽  
Femoral Shaft ◽  
Hip Resurfacing ◽  
Total Hip ◽  
Joint Prostheses

The UHMWPE acetabular cups are the most popular joints for joint prostheses after Charnley introduced UHMWPE for the acetabular component in 1962. It has been demonstrated that polyethylene wear remains the main source of particles in the THR and therefore requires particular attention. The paper presents a series of theoretical and practical aspects regarding the wear of acetabular cups (made of UHMWPE) from the total hip prosthesis component. At the same time, the other tribological phenomena that occur in these MoP (metal on polyethylene) combinations are treated, such as lubrication and friction. Total Hip Replacement & Hip Resurfacing A hip replacement involves replacing the hip joint with a mechanical bearing system which is comprised of a femoral component and an acetabular component. During a hip replacement the acetabulum is reamed and the acetabular component is fitted into the cavity and the femoral component can either be placed over a reamed femoral head, in a procedure referred to as hip resurfacing, or positioned inside the femoral shaft during a total hip replacement [1]. Fig. 1. Total Hip Replacement (a) and Hip Resurfacing Replacement (b) [2].

scholarly journals Measurement of the femoral neck angle in medium and large dog breeds using computed tomography

2019 ◽  
Vol 67 (1) ◽  
pp. 22-33
Author(s):  
Ahmad Al Aiyan ◽  
Kenneth Richardson ◽  
George Manchi ◽  
Johanna Plendl ◽  
Leo Brunnberg
Keyword(s):  
Computed Tomography ◽  
Femoral Neck ◽  
Hip Prosthesis ◽  
Three Dimensional ◽  
Image Data ◽  
Total Hip Prosthesis ◽  
Total Hip ◽  
Group I ◽  
Group Ii ◽  
Femoral Neck Angle

The aim of this study was to get precise normal values of the femoral neck angle (FNA) in support of developing an optimally functioning total hip prosthesis for medium and large dog breeds. Accordingly, two- and three-dimensional computed tomographic images of the anatomical structures of the proximal femora of 58, hip-dysplasia-free, mature dogs of medium and large breeds were studied. Based on the length of their femora the dogs were allocated to Group I (from 145 to 195 mm) and Group II (from 196 to 240 mm). The FNA was measured on each femur using multi-slice spiral computed tomography (CT). The two- and three-dimensional image data were processed as multi-planar and threedimensional reconstructions using Advantage Workstation software. The CT measurements revealed that Group I had an average femoral neck angle of 147.59° (min. 144.05°, max. 153.35°), while in Group II the average FNA was 147.46° (min. 141°, max. 154.35°). There was no significant correlation between the length of the femur and the FNA in either group. The optimal FNA for a total hip prosthesis is 147.5° for medium and large dog breeds.

Outcome and complications after dual mobility total hip replacement

2012 ◽  
Vol 25 (06) ◽  
pp. 511-517 ◽  
Author(s):  
A. Autefage ◽  
T. Dembour ◽  
J.-L. Chancrin ◽  
P. Guillaumot
Keyword(s):  
Aseptic Loosening ◽  
Acetabular Component ◽  
Acetabular Fracture ◽  
Hip Prosthesis ◽  
Perioperative Complications ◽  
Greater Trochanter ◽  
Dual Mobility ◽  
Total Hip ◽  
Trochanter Fracture

SummaryObjectives: To report the clinical and radiographic outcome of a canine total hip prosthesis with a dual mobility acetabular component, with a minimum of six months follow-up.Methods: The outcome of dogs that underwent primary cemented unilateral dual mobility hip prosthesis surgery by one of the authors for hip dysplasia or trauma, and which had a minimum of six months clinical and radiologic follow-up, was evaluated.Results: Fifty dogs were included in the study. Follow-up ranged from six to 38 months (mean 14.4 months). Perioperative complications were acetabular collapse (n = 1) and greater trochanter fracture (n = 1), both of which were successfully managed perioperatively. Postoperative complications were aseptic loosening of the acetabular component (n = 2; both surgically revised), implant sepsis (n = 3; all explanted), acetabular fracture (n = 1; conservatively managed), greater trochanter fracture (n = 1; conservatively managed) and sciatic neurapraxia (n = 1). No cases of postoperative luxation or femoral implant aseptic loosening were encountered. Outcome was poor for three cases (3 implant sepsis), fair for three cases (including 1 acetabular component loosening and 1 acetabular fracture), and good or excellent for 44 cases (88%).Clinical significance: There were not any cases of postoperative coxofemoral luxation observed in this series of 50 dogs with dual mobility hip prosthesis. Studies with more patients and longer follow-up are needed to confirm the satisfactory results observed to date with this implant.

scholarly journals Usefulness of Intraoperative C-Arm Image Intensifier in Reducing Errors of Acetabular Component During Primary Total Hip Arthroplasty: An Application of Widmer’s Method

2021 ◽  
Author(s):  
Joo-Hyoun Song ◽  
Yong-Sik Kim ◽  
Soon-Yong Kwon ◽  
Young-Wook Lim ◽  
Jiyoung Jung ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Total Hip Arthroplasty ◽  
Acetabular Component ◽  
Hip Arthroplasty ◽  
Intraoperative Imaging ◽  
Harris Hip Score ◽  
Acetabular Cup ◽  
Target Zone ◽  
Total Hip ◽  
3D Computed Tomography

Abstract Background: Acetabular prosthesis positioning in total hip arthroplasty (THA) is crucial in reducing the risk of dislocation. There has been minimal research on the proper way to put the acetabular components into the safe zone intraoperatively. Assessment of version by intraoperative imaging intensifier is very valuable. The value of Widmer’s method, using the intraoperative C-arm available to determine cup anteversion was assessed.Methods: 101 hips in 91 patients who underwent primary THA were eligible for inclusion. Utilizing intraoperative C-arm images, measurement was performed using the technique described by Widmer. The values obtained using 3D computed tomography postoperatively, which determined the anteversion of the acetabular component, were regarded as the reference standard.Results: The method of Widmer obtained values similar to those obtained using 3D computed tomography and was considered accurate (n.s.). All 101 hips were positioned in the set target zone. Among the 101 hips, the cup position in nine hips (8.9%) was changed. The dislocation rate in our study was 1.0% with all dislocations occurring in hips placed in the target zone. The mean Harris hip score after THA in one year was 94.2 (82-98).Conclusions: The method of Widmer was accurate using intraoperative imaging intensifier for the measurement of the anteversion of the acetabular component during THA, with reference to the anteversion obtained from the 3D computed tomography. Also, utilizing intraoperative C-arm imaging was very useful because it allowed for correction of the position of the acetabular cup.

Dual mobility canine total hip prosthesis: Implant characteristics and surgical procedure

2012 ◽  
Vol 25 (06) ◽  
pp. 506-510 ◽  
Author(s):  
A. Autefage ◽  
S. Palierne ◽  
T. Dembour ◽  
J.-L. Chancrin ◽  
P. Guillaumot
Keyword(s):  
High Risk ◽  
Acetabular Component ◽  
Hip Replacement ◽  
Surgical Procedure ◽  
Hip Prosthesis ◽  
The Other ◽  
Total Hip Prosthesis ◽  
Dual Mobility ◽  
Prosthetic Head ◽  
Acetabular Components

SummaryProsthetic dislocation is one of the most common complications after canine hip replacement. The use of dual mobility acetabular components has been shown to reduce the rate of dislocation in first intent hip replacement in human patients who are at high risk for dislocation. In such implants, a mobile polyethylene liner articulates on one side with a metallic acetabular component and on the other side with a metallic prosthetic head. A dual mobility cemented acetabular component has been designed for use in dogs, and is available for use in association with a previously designed modular femoral component. This report describes the characteristics and the procedure for implantation of this implant combination.

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