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Published in: Archives of Orthopaedic and Trauma Surgery 2/2024

Open Access 29-09-2023 | Hip-TEP | Hip Arthroplasty

Demographic characteristics influencing the stem subsidence in total hip arthroplasty: an imaging study

Authors: Filippo Migliorini, Nicola Maffulli, Marco Pilone, Erlis Velaj, Ulf Krister Hofmann, Andreas Bell

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 2/2024

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Abstract

Introduction

The present study evaluated whether patient demographic characteristics influence the subsidence of the stem in total hip arthroplasty (THA). The following characteristics were evaluated: age, height, weight, and sex. The association between the time elapsed from the THA implantation and the amount of stem subsidence was also investigated.

Methods

The records of patients who underwent THA in the period between 2016 and 2023 were accessed. All patients underwent two-staged bilateral THA using cementless DePuy collarless Corail (DePuy Synthes, Raynham, MA, USA) stems. The following parameters were measured and compared to assess stem subsidence: distance from the proximal femur at the stem bone interface and the medial apex of the regular triangle built within the trochanter minor (point A); distance from the medial apex of the regular triangle built within the trochanter minor and the distal portion of the femoral stem (point B).

Results

Overall, 294 patients were included. 62% (182 of 294 patients) were women. 45% (134 of 296 THAs) were on the right side. The mean age was 64.9 ± 10.4 years. The mean BMI was 28.3 ± 5.1 kg/m2. The mean length of the follow-up was 14.4 ± 11.0 months. The mean subsidence in point A was 2.1 mm (P < 0.0001), and that in point B was 3.1 mm (P < 0.0001). There was evidence of a weak positive association between patient weight (P < 0.0001), age (P = 0.03), follow-up (P = 0.002) and the amount of stem subsidence. Patient height did not demonstrate any association with the amount of stem subsidence (P = 0.07). There was no difference in stem subsidence between women and men (P = 0.9).

Conclusion

Stem subsidence in THA using cementless DePuy collarless Corail implants is approximately 2.6 mm after 14.4 months. Greater patient weight, age, and longer time elapsed from THA implantation were associated with greater stem subsidence. Patient height and sex did not demonstrate any influence on the amount of stem subsidence. These results must be considered in light of the limitations of the present study.
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Metadata
Title
Demographic characteristics influencing the stem subsidence in total hip arthroplasty: an imaging study
Authors
Filippo Migliorini
Nicola Maffulli
Marco Pilone
Erlis Velaj
Ulf Krister Hofmann
Andreas Bell
Publication date
29-09-2023
Publisher
Springer Berlin Heidelberg
Keywords
Hip-TEP
Hip-TEP
Published in
Archives of Orthopaedic and Trauma Surgery / Issue 2/2024
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI
https://doi.org/10.1007/s00402-023-05054-y

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