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A stature-specific concept for uncemented, primary total hip arthroplasty: 10-year results in 155 patients using two stem shapes and modular necks

BACKGROUND AND PURPOSE: Variations in hip anatomy limit the femoral canal fit of standard uncemented hip stems. In addition, there are still issues with leg length discrepancy and offset reconstruction, potentially resulting in impingement, dislocation, and wear. Modular stems with different shapes...

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Autores principales: Omlor, Georg W, Ullrich, Hannah, Krahmer, Knut, Jung, Alexander, Aldinger, Günther, Aldinger, Peter
Formato: Texto
Lenguaje:English
Publicado: Informa Healthcare 2010
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2856217/
https://www.ncbi.nlm.nih.gov/pubmed/20146639
http://dx.doi.org/10.3109/17453671003587077
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author Omlor, Georg W
Ullrich, Hannah
Krahmer, Knut
Jung, Alexander
Aldinger, Günther
Aldinger, Peter
author_facet Omlor, Georg W
Ullrich, Hannah
Krahmer, Knut
Jung, Alexander
Aldinger, Günther
Aldinger, Peter
author_sort Omlor, Georg W
collection PubMed
description BACKGROUND AND PURPOSE: Variations in hip anatomy limit the femoral canal fit of standard uncemented hip stems. In addition, there are still issues with leg length discrepancy and offset reconstruction, potentially resulting in impingement, dislocation, and wear. Modular stems with different shapes for femoral canal fit and multiple neck options may improve the outcome and reduce complications. PATIENTS AND METHODS: 173 patients (190 hips) received an uncemented THA with 1 of 2 different stem shapes for canal fit and a modular neck for stature-specific hip reconstruction. Median follow-up time was 9 (7–13) years. During the follow-up period, 20 patients died (22 hips) and 12 patients (13 hips) were lost to follow-up. 155 hips were available for evaluation, including clinical and radiological outcome. RESULTS: 1 stem was revised for a periprosthetic fracture following trauma; 10 cups and 2 modular necks were revised (1 for breakage and 1 during cup revision). At 10 years, stem survival was 100%, modular neck survival was 99% (CI: 95–100), and cup survival was 94% (CI: 87–97). No leg length discrepancies were measured in 96% of cases. Offset with anatomic lateralization was achieved in 98%. Median Harris hip score was 94 (47–100) and median Merle d'Aubigné score was 16 (10–18). Relevant radiolucent lines and osteolysis were not found. INTERPRETATION: The uncemented modular neck, dual-stem system used in this series allows accurate reconstruction of the joint by adapting the implant to the needs of the patient. This may improve the outcome of primary THA, which is supported by the results of this medium-term follow-up evaluation.
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spelling pubmed-28562172010-09-03 A stature-specific concept for uncemented, primary total hip arthroplasty: 10-year results in 155 patients using two stem shapes and modular necks Omlor, Georg W Ullrich, Hannah Krahmer, Knut Jung, Alexander Aldinger, Günther Aldinger, Peter Acta Orthop Research Article BACKGROUND AND PURPOSE: Variations in hip anatomy limit the femoral canal fit of standard uncemented hip stems. In addition, there are still issues with leg length discrepancy and offset reconstruction, potentially resulting in impingement, dislocation, and wear. Modular stems with different shapes for femoral canal fit and multiple neck options may improve the outcome and reduce complications. PATIENTS AND METHODS: 173 patients (190 hips) received an uncemented THA with 1 of 2 different stem shapes for canal fit and a modular neck for stature-specific hip reconstruction. Median follow-up time was 9 (7–13) years. During the follow-up period, 20 patients died (22 hips) and 12 patients (13 hips) were lost to follow-up. 155 hips were available for evaluation, including clinical and radiological outcome. RESULTS: 1 stem was revised for a periprosthetic fracture following trauma; 10 cups and 2 modular necks were revised (1 for breakage and 1 during cup revision). At 10 years, stem survival was 100%, modular neck survival was 99% (CI: 95–100), and cup survival was 94% (CI: 87–97). No leg length discrepancies were measured in 96% of cases. Offset with anatomic lateralization was achieved in 98%. Median Harris hip score was 94 (47–100) and median Merle d'Aubigné score was 16 (10–18). Relevant radiolucent lines and osteolysis were not found. INTERPRETATION: The uncemented modular neck, dual-stem system used in this series allows accurate reconstruction of the joint by adapting the implant to the needs of the patient. This may improve the outcome of primary THA, which is supported by the results of this medium-term follow-up evaluation. Informa Healthcare 2010-02 2010-03-31 /pmc/articles/PMC2856217/ /pubmed/20146639 http://dx.doi.org/10.3109/17453671003587077 Text en Copyright: © Nordic Orthopedic Federation http://creativecommons.org/licenses/by/2.5/ This is an open-access article distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the source is credited.
spellingShingle Research Article
Omlor, Georg W
Ullrich, Hannah
Krahmer, Knut
Jung, Alexander
Aldinger, Günther
Aldinger, Peter
A stature-specific concept for uncemented, primary total hip arthroplasty: 10-year results in 155 patients using two stem shapes and modular necks
title A stature-specific concept for uncemented, primary total hip arthroplasty: 10-year results in 155 patients using two stem shapes and modular necks
title_full A stature-specific concept for uncemented, primary total hip arthroplasty: 10-year results in 155 patients using two stem shapes and modular necks
title_fullStr A stature-specific concept for uncemented, primary total hip arthroplasty: 10-year results in 155 patients using two stem shapes and modular necks
title_full_unstemmed A stature-specific concept for uncemented, primary total hip arthroplasty: 10-year results in 155 patients using two stem shapes and modular necks
title_short A stature-specific concept for uncemented, primary total hip arthroplasty: 10-year results in 155 patients using two stem shapes and modular necks
title_sort stature-specific concept for uncemented, primary total hip arthroplasty: 10-year results in 155 patients using two stem shapes and modular necks
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2856217/
https://www.ncbi.nlm.nih.gov/pubmed/20146639
http://dx.doi.org/10.3109/17453671003587077
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