scholarly journals Elevated Lip Liner Positions Improving Stability in Total Hip Arthroplasty – An Experimental Study

2018 ◽  
Vol 7 (4) ◽  
Author(s):  
Suleman Qurashi ◽  
William Parr ◽  
Bob Jang ◽  
William R Walsh
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Range Of Motion ◽  
Femoral Component ◽  
Acetabular Component ◽  
Hip Arthroplasty ◽  
Total Hip ◽  
Flexion Extension ◽  
Set Up ◽  
Head Component

Background: The use of elevated lip polyethylene liners with the acetabular component is relatively common in Total Hip Arthroplasty (THA). Elevated lip liners increase stability of the THA by increasing the jump distance in one direction. However, the elevated lip, conversely, also reduces the primary arc in the opposite direction and leads to early impingement of the neck on the elevated lip, potentially causing instability. The aim of the present study is to determine the total range of motion of the femoral head component within the acetabular component with the elevated lip liner in different orientations within the acetabular cup.Methods: We introduce a novel experimental (ex-vivo) framework for studying the effects lip liner orientation on the range of motion of the femoral component. For constant acetabular cup orientation, the elevated lip liner was positioned superiorly and inferiorly. The femoral component range of motion in the coronal, sagittal and axial plane was measured. To avoid any confounding influences of out of plane motion, the femoral component was constrained to move in the tested plane.Results: This experimental set up introduces a rigorous framework in which to test the effects of elevated lip liner orientations on the range of motion of the femoral head component in abduction, adduction, flexion, extension and rotation. The movements of this experimental set-up are directly informative of patient’s maximum potential post-operative range of motion. Initial results show that an inferior placement of the elevated lip increases the effective superior lateral range of motion (abduction) for the femoral component, whilst the anatomy of the patient (i.e. their other leg) prevents the point of femoral component – acetabular lip impingement being reached (in adduction).

Radiolucent lines do not affect the longevity of highly cross-linked polyethylene cemented components in total hip arthroplasty

2021 ◽  
Vol 103-B (10) ◽  
pp. 1604-1610
Author(s):  
Yusuke Takaoka ◽  
Koji Goto ◽  
Jiro Tamura ◽  
Yaichiro Okuzu ◽  
Toshiyuki Kawai ◽  
...  
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Acetabular Component ◽  
Hip Arthroplasty ◽  
Long Term Outcome ◽  
Total Hip ◽  
Radiolucent Lines ◽  
Kaplan Meier ◽  
Acetabular Components

Aims We aimed to evaluate the long-term outcome of highly cross-linked polyethylene (HXLPE) cemented acetabular components and assess whether any radiolucent lines (RLLs) which arose were progressive. Methods We retrospectively reviewed 170 patients who underwent 187 total hip arthroplasties at two hospitals with a minimum follow-up of ten years. All interventions were performed using the same combination of HXLPE cemented acetabular components with femoral stems made of titanium alloy. Kaplan-Meier survival analysis was performed for the primary endpoint of acetabular component revision surgery for any reason and secondary endpoint of the appearance of RLLs. RLLs that had appeared once were observed over time. We statistically assessed potential relationships between RLLs and a number of factors, including the technique of femoral head autografting and the Japanese Orthopaedic Association score. Results The mean follow-up period was 13.0 years (10.0 to 16.3). Femoral head autografting was performed on 135 hips (72.2%). One acetabular component was retrieved because of deep infection. No revision was performed for the aseptic acetabular loosening. The Kaplan-Meier survival curve for the primary and secondary endpoints were 98.2% (95% confidence interval (CI) 88.6% to 99.8%) and 79.3% (95% CI 72.8% to 84.6%), respectively. RLLs were detected in 38 hips (21.2%), at a mean of 1.7 years (1 month to 6 years) postoperatively. None of the RLLs were progressive, and the presence of RLLs did not show a significant association with the survival and clinical score. RLLs were more frequently observed in hips without femoral head autografts than in those with autografts. Conclusion The use of HXLPE cemented acetabular components in total hip arthroplasty demonstrated excellent clinical outcomes after ten years, and no RLLs were progressive, and their presence did not affect the outcome. Femoral head autografting did not negatively impact the acetabular component survival or the appearance of RLLs. Cite this article: Bone Joint J 2021;103-B(10):1604–1610.

Range of Motion and Stability in Total Hip Arthroplasty With 28-, 32-, 38-, and 44-mm Femoral Head Sizes

2005 ◽  
Vol 20 (1) ◽  
pp. 11-19 ◽  
Author(s):  
Brian R. Burroughs ◽  
Brian Hallstrom ◽  
Gregory J. Golladay ◽  
Daniel Hoeffel ◽  
William H. Harris
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Range Of Motion ◽  
Hip Arthroplasty ◽  
Total Hip

scholarly journals Second-generation uncemented total hip arthroplasty: a minimum 20-year follow-up

2021 ◽  
Vol 2 (1) ◽  
pp. 33-39
Author(s):  
Jeffrey R. McLaughlin ◽  
Kyla R. Lee ◽  
Mary Ann Johnson
Keyword(s):  
Total Hip Arthroplasty ◽  
Aseptic Loosening ◽  
Femoral Component ◽  
Acetabular Component ◽  
Hip Arthroplasty ◽  
Second Generation ◽  
Total Hip ◽  
Uncemented Total Hip Arthroplasty ◽  
Acetabular Components

Aims We present the clinical and radiological results at a minimum follow-up of 20 years using a second-generation uncemented total hip arthroplasty (THA). These results are compared to our previously published results using a first-generation hip arthroplasty followed for 20 years. Methods A total of 62 uncemented THAs in 60 patients were performed between 1993 and 1994. The titanium femoral component used in all cases was a Taperloc with a reduced distal stem. The acetabular component was a fully porous coated threaded hemispheric titanium shell (T-Tap ST). The outcome of every femoral and acetabular component with regard to retention or revision was determined for all 62 THAs. Complete clinical follow-up at a minimum of 20 years was obtained on every living patient. Radiological follow-up was obtained on all but one. Results Two femoral components (3.2%) required revision. One stem was revised secondary to a periprosthetic fracture one year postoperatively and one was revised for late sepsis. No femoral component was revised for aseptic loosening. Six acetabular components had required revision, five for aseptic loosening. One additional acetabular component was revised for sepsis. Radiologically, all femoral components remained well fixed. One acetabular was judged loose by radiological criteria. The mean Harris Hip Score improved from 46 points (30 to 67) preoperatively to 89 points (78 to 100) at final follow-up. With revision for aseptic loosening as the endpoint, survival of the acetabular component was 95% (95% confidence interval (CI) 90 to 98) at 25 years. Femoral component survival was 100%. Conclusion The most significant finding of this report was the low prevalence of aseptic loosening and revision of the femoral component at a mean follow-up of 22 years. A second important finding was the survival of over 90% of the hemispheric threaded ring acetabular components. While these shells remain controversial, in this series they performed well. Cite this article: Bone Jt Open 2021;2(1):33–39.

Influence of femoral head diameter on intraoperative range of motion in total hip arthroplasty

2019 ◽  
Vol 6 (3) ◽  
pp. 175-179
Author(s):  
Nobuhiro Kaku ◽  
Hiroaki Tagomori ◽  
Hiroya Akase ◽  
Shouhei Noda ◽  
Masashi Kataoka ◽  
...  
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Range Of Motion ◽  
Hip Arthroplasty ◽  
Head Diameter ◽  
Total Hip ◽  
Femoral Head Diameter

scholarly journals Vitamin E-doped total hip arthroplasty liners show similar head penetration to highly cross-linked polyethylene at five years: a multi-arm randomized controlled trial

2020 ◽  
Vol 102-B (10) ◽  
pp. 1303-1310 ◽  
Author(s):  
Kristian Kjærgaard ◽  
Ming Ding ◽  
Carsten Jensen ◽  
Charles Bragdon ◽  
Henrik Malchau ◽  
...  
Keyword(s):  
Vitamin E ◽  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Aseptic Loosening ◽  
Acetabular Component ◽  
Hip Arthroplasty ◽  
Harris Hip Score ◽  
Head Penetration ◽  
Total Hip ◽  
Component Migration

Aims The most frequent indication for revision surgery in total hip arthroplasty (THA) is aseptic loosening. Aseptic loosening is associated with polyethylene liner wear, and wear may be reduced by using vitamin E-doped liners. The primary objective of this study was to compare proximal femoral head penetration into the liner between a) two cross-linked polyethylene (XLPE) liners (vitamin E-doped (vE-PE)) versus standard XLPE liners, and b) two modular femoral head diameters (32 mm and 36 mm). Methods Patients scheduled for a THA were randomized to receive a vE-PE or XLPE liner with a 32 mm or 36 mm metal head (four intervention groups in a 2 × 2 factorial design). Head penetration and acetabular component migration were measured using radiostereometric analysis at baseline, three, 12, 24, and 60 months postoperatively. The Harris Hip Score, University of California, Los Angeles (UCLA) Activity Score, EuroQol five-dimension questionnaire (EQ-5D), and 36-Item Short-Form Health Survey questionnaire (SF-36) were assessed at baseline, three, 12, 36, and 60 months. Results Of 220 screened patients, 127 were included in this study. In all, 116 received the allocated intervention, and 94 had their results analyzed at five years. Head penetration was similar between liner materials and head sizes at five years, vE-PE versus XLPE was -0.084 mm (95% confidence interval (CI) -0.173 to 0.005; p = 0.064), and 32 mm versus 36 mm was -0.020 mm (95% CI -0.110 to 0.071; p = 0.671), respectively. No differences were found in acetabular component migration or in the patient-reported outcome measures. Conclusion No significant difference in head penetration was found at five years between vE-PE and XLPE liners, nor between 32 mm and 36 mm heads. Cite this article: Bone Joint J 2020;102-B(10):1303–1310.

scholarly journals Cup-To-Neck Contact and Range of Motion after Total Hip Arthroplasty with Large Head Diameters: An Original Three-Dimensional Combined Gait and Videofluoroscopy Analysis

2020 ◽  
Vol 10 (8) ◽  
pp. 2695
Author(s):  
Claudio Belvedere ◽  
Giada Lullini ◽  
Maurizio Ortolani ◽  
Andrea Ensini ◽  
Stefano Durante ◽  
...  
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Gait Analysis ◽  
Range Of Motion ◽  
Hip Arthroplasty ◽  
Three Dimensional ◽  
Motor Tasks ◽  
Large Femoral Head ◽  
Total Hip ◽  
Limited Range Of Motion

After a total hip arthroplasty, a limited range of motion and lower-limb disability continue to be observed, with these being mainly associated with the implant design and the head-to-neck ratio. Larger diameters of the head bearings were assumed to provide better stability, a larger range of motion, and smaller risks of dislocation and stem-to-liner impingement. However, these claims have never been demonstrated in real patients. The specific aim of this study was to assess, via multi-instrumental analysis, whether the range of motion of a replaced hip is limited by the stem-to-liner contact in patients with large femoral head diameters. Twenty-three patients with a total hip arthroplasty were evaluated at their one-year follow-ups using clinical and instrumental examinations. A combined three-dimensional gait analysis of the full body and videofluoroscopy analysis of the replaced hip were performed during the execution of standard, i.e., daily living, and more demanding motor tasks. The latter were meant to reach the extreme range of motion at the replaced hip site, thus revealing possible stem-to-liner contact. An original technique based on imaging and computer-aided design (CAD) models of the prosthesis components was developed to calculate the stem-to-liner distance. Excellent clinical scores were observed in the study. The gait analysis showed that the range of motion of the replaced hip in the sagittal plane, averaged over all patients, ranged from 28° to 78° in standard activities. In more demanding tasks, single peaks were as high as 110°, 39°, and 60° in the sagittal, frontal, and transverse anatomical planes, respectively. In all motor tasks, the stem-to-liner distances ranged from 8.7 to 13.0 mm on average, with one outlier minimum distance being 2.2 mm. This study shows that, even in demanding motor tasks and with an extreme range of motion, the hip joint replaced with large femoral head diameters did not experience impingement between the prosthesis components.

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