Anterior Dislocation after Total Hip Replacement – Effects of Pelvic Rotation and Femoral Head Size

2013 ◽  
Vol 23 (4) ◽  
pp. 386-390 ◽  
Author(s):  
Fu-Yuen Ng ◽  
Qun Wang ◽  
Kwong-Yuen Chiu ◽  
Chun-Hoi Yan
Keyword(s):  
Femoral Head ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Head Size ◽  
Anterior Dislocation ◽  
Femoral Head Size ◽  
Pelvic Rotation ◽  
Total Hip

Influence of femoral head size on impingement, dislocation and stress distribution in total hip replacement

2007 ◽  
Vol 29 (4) ◽  
pp. 465-471 ◽  
Author(s):  
Daniel Kluess ◽  
Heiner Martin ◽  
Wolfram Mittelmeier ◽  
Klaus-Peter Schmitz ◽  
Rainer Bader
Keyword(s):  
Femoral Head ◽  
Stress Distribution ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Head Size ◽  
Femoral Head Size ◽  
Total Hip

Lower rates of dislocation with increased femoral head size after primary total hip replacement

2011 ◽  
Vol 93-B (7) ◽  
pp. 876-880 ◽  
Author(s):  
S. S. Jameson ◽  
D. Lees ◽  
P. James ◽  
I. Serrano-Pedraza ◽  
P. F. Partington ◽  
...  
Keyword(s):  
Femoral Head ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Head Size ◽  
Femoral Head Size ◽  
Total Hip

scholarly journals Analysis of biomechanical gait parameters in patients after total hip replacement operated via anterolateral approach depending on size of the femoral head implant: retrospective matched-cohort study

2021 ◽  
Author(s):  
Artur Stolarczyk ◽  
Magda Stolarczyk ◽  
Łukasz Oleksy ◽  
Grzegorz J. Maciąg ◽  
Piotr Stępiński ◽  
...  
Keyword(s):  
Femoral Head ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Gait Pattern ◽  
Head Size ◽  
Anterolateral Approach ◽  
Double Support ◽  
Total Hip ◽  
Gait Parameters ◽  
Patient Reported

Abstract Introduction Total hip replacement (THR) is considered one of the most effective medical procedures in treatment of osteoarthritis. Since its introduction, there has been a worldwide debate over proper implant selection in terms of size, bearing type and shape. Following study was designed to assess the importance of femoral head size in long-term follow-up. Materials and methods A cohort of 30 patients with primary end stage osteoarthritis who underwent total hip replacement was analysed retrospectively. A homogenous group was chosen with no major differences in BMI. Patients’ gait parameters were measured in a biomechanics laboratory using the 3D BTS Smart system. WOMAC and VAS questionnaires were used to assess patient reported outcome. Results The subgroup with larger implant head size had several outcomes significantly superior to the subgroup with standard head size and non-inferior to healthy hips. Following variables were measured during this study: time of support phase, time of swing phase, double support time, walking hip extension angle. Conclusions Use of larger sized femoral heads during THR gives better results in terms of gait pattern. Since restoring the gait pattern is one of the aspects of rehabilitation and returning to daily activities it seems to be an important observation.

Total Hip Replacement after Failed Femoral Head and Neck Excision in Two Dogs and Two Cats

2012 ◽  
Vol 41 (1) ◽  
pp. 136-142 ◽  
Author(s):  
Noel Fitzpatrick ◽  
Laura Pratola ◽  
Russell Yeadon ◽  
Christos Nikolaou ◽  
Michael Hamilton ◽  
...  
Keyword(s):  
Femoral Head ◽  
Head And Neck ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Total Hip

Robotic-Arm Assisted Total Hip Arthroplasty Results in Smaller Acetabular Cup Size in Relation to the Femoral Head Size: A Matched-Pair Controlled Study

2017 ◽  
Vol 27 (2) ◽  
pp. 147-152 ◽  
Author(s):  
Carlos Suarez-Ahedo ◽  
Chengcheng Gui ◽  
Timothy J. Martin ◽  
Sivashankar Chandrasekaran ◽  
Parth Lodhia ◽  
...  
Keyword(s):  
Femoral Head ◽  
Head Size ◽  
Robotic Arm ◽  
Matched Pair ◽  
Femoral Head Size ◽  
Acetabular Cup ◽  
Acetabular Bone ◽  
Head Diameter ◽  
Total Hip ◽  
Femoral Head Diameter

Purpose To compare the acetabular component size relative to the patient's native femoral head size between conventional THA (CTHA) approach and robotic-arm assisted THA (RTHA) to infer which of these techniques preserved more acetabular bone. Methods Patients were included if they had primary osteoarthritis (OA) and underwent total hip replacement between June 2008 and March 2014. Patients were excluded if they had missing or rotated postoperative anteroposterior radiographs. RTHA patients were matched to a control group of CTHA patients, in terms of preoperative native femoral head size, age, gender, body mass index (BMI) and approach. Acetabular cup size relative to femoral head size was used as a surrogate for amount of bone resected. We compared the groups according to 2 measures describing acetabular cup diameter ( c) in relation to femoral head diameter ( f): (i) c-f, the difference between cup diameter and femoral head diameter and (ii) ( c-f)/ f, the same difference as a fraction of femoral head diameter. Results 57 matched pairs were included in each group. There were no significant differences between groups for demographic measures, femoral head diameter, or acetabular cup diameter (p>0.05). However, measures (i) and (ii) did differ significantly between the groups, with lower values in the RTHA group (p<0.02). Conclusions Using acetabular cup size relative to femoral head size as an approximate surrogate measure of acetabular bone resection may suggest greater preservation of bone stock using RTHA compared to CTHA. Further studies are needed to validate the relationship between acetabular cup size and bone loss in THA.

scholarly journals Malunion of the Acetabulum Treated by Intra-articular Buttress

2020 ◽  
Vol 2020 ◽  
pp. 1-3
Author(s):  
D. Saragaglia ◽  
J. Gaillot
Keyword(s):  
Femoral Head ◽  
Total Hip Replacement ◽  
Clinical Result ◽  
Hip Replacement ◽  
Surgical Indications ◽  
Total Hip ◽  
Original Technique ◽  
Head Fragment

Acetabulum malunions are extremely difficult to treat, and for many years, surgical indications have been dominated by total hip replacement. We treated a protruding acetabular malunion, 20 years ago, using an intra-articular buttress, by means of an allograft corresponding to a femoral head fragment which had been cryopreserved. The radiological and clinical result with this extended follow-up is quite remarkable, which has motivated us to present this original technique.

Acoustic Vibration and Mechanical In Vivo Analysis of the Hip Joint After a Total Hip Arthroplasty

2007 ◽  
Author(s):  
D. A. Glaser ◽  
R. D. Komistek ◽  
H. E. Cates ◽  
M. Mahfouz
Keyword(s):  
Femoral Head ◽  
Total Hip Replacement ◽  
Hip Joint ◽  
Hip Replacement ◽  
Acoustic Vibration ◽  
Valuable Insight ◽  
Acetabular Cup ◽  
Total Hip ◽  
Resonance Frequencies

The major complications following total hip replacement (THA) are implant loosening, dislocation, instability, fracture and infection. It is hypothesized that vibration, in the range of the resonance frequencies, may cause pain, bone degeneration and fracture. A further understanding of the physical response resulting from impact during femoral head sliding may lead to valuable insight pertaining to THA failure. Therefore, the first objective of this present study was to determine if frequencies propagating through the hip joint near resonant frequencies may lead to wear or loosening of the components. Recently, studies found that femoral head sliding, often referred to as hip separation, between the acetabulum cup and the femoral head does occur, which may also play a role in complications observed with THA today, but a the effects of hip separation and the causes of its occurrence has not been studied as jet. Therefore, the second objective of this study was to determine if a sound sensor, externally attached, could be used to correlate impact loading sounds from femoral head sliding in the acetabular cup. Additional objective of this study was to develop a mathematical model that better simulates the in vivo loading conditions of total hip replacement patients using in vivo fluoroscopic and ground reaction data as input.

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