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Erschienen in: Der Orthopäde 5/2020

02.04.2020 | Leitthema

Long-term results of custom-made femoral stems

verfasst von: Christophe Jacquet, MD, Xavier Flecher, MD, PhD, Charles Pioger, MD, Maxime Fabre-Aubrespy, MD, Matthieu Ollivier, MD, PhD, Jean-Noel Argenson, MD, PhD

Erschienen in: Die Orthopädie | Ausgabe 5/2020

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Abstract

Background

The progress of 3D imaging and manufacturing of implants has made it possible to achieve a custom-made concept in THA. The custom-made cementless femoral stem provides optimal implant stability combined with restoration of the native hip mechanics.

Objective

The purpose of this study was to evaluate the long-term survivorship of custom-made hip femoral stems in two populations of patients undergoing THA: patients under 50 years old (young patients group) and patients with high-grade developmental dysplasia of the hip (DDH group).

Methods

A series of 232 primary custom-made cementless THA stems were retrospectively evaluated in patients less than 50 years old at the time of surgery and at follow-up after an average of 20 years. A second series of 26 custom-made cementless stem THAs for late DDH (21 patients) including only Crowe grade III and grade IV were also retrospectively evaluated with an average follow-up of 16 years. The clinical and radiological evaluations were performed preoperatively and at yearly intervals.

Results

For the young patient group, the follow-up ranged from 14 to 27 years. The HHS and the Merle D’Aubigne-Postel score significantly improved from preoperatively to a mean of 94.1 (range 48–100) and 15.9 (range 9–18), respectively. Taking stem revision for aseptic loosening as an endpoint, survivorship was 96.8% at 20 years (95% confidence interval, CI 95.1–98.5). For the DDH group, the follow-up ranged from 10 to 22 years. The mean HHS increased significantly from preoperative 49 ± 22 points to the most recent follow-up examination with 86 13 points and survivorship was 96.1% (95% CI, 92.7–99.9).

Conclusion

Custom-made femoral stems provide good functional outcome and long-term survivorship in two specific populations of patients undergoing THAs: patients under 50 years old with high expectations and patients with high-grade DDH.
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Metadaten
Titel
Long-term results of custom-made femoral stems
verfasst von
Christophe Jacquet, MD
Xavier Flecher, MD, PhD
Charles Pioger, MD
Maxime Fabre-Aubrespy, MD
Matthieu Ollivier, MD, PhD
Jean-Noel Argenson, MD, PhD
Publikationsdatum
02.04.2020
Verlag
Springer Medizin
Erschienen in
Die Orthopädie / Ausgabe 5/2020
Print ISSN: 2731-7145
Elektronische ISSN: 2731-7153
DOI
https://doi.org/10.1007/s00132-020-03901-z

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