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Published in: International Orthopaedics 7/2014

01-07-2014 | Original Paper

Does stem design influence component positioning in total hip arthroplasty using a minimal invasive posterolateral approach?

Authors: Wenzel Waldstein, Christian Merle, Tom Schmidt-Braekling, Friedrich Boettner

Published in: International Orthopaedics | Issue 7/2014

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Abstract

Purpose

Limited data exist for the reconstructive potential of short bone-preserving stems in THA using a minimal invasive posterolateral approach. Our study aim was to assess the effect of stem design on the reconstruction of hip offset and leg length in MIS posterolateral THA.

Methods

This retrospective consecutive single-surgeon study compares hip offset and leg length, as well as acetabular component positioning (cup anteversion; inclination) of 129 THAs with a cementless standard-length stem (Synergy®) and 143 THAs with a cementless short bone-preserving stem (Trilock®).

Results

In reference to the contralateral side, the mean difference in hip offset was 0.9 mm (p = 0.067) for the standard stem and 0.1 mm (p = 0.793) for the short stem, respectively. Leg-length discrepancy was 0.7 mm (Synergy®) and 0.9 mm (Trilock®), respectively. A total of 233 (86 %) acetabular components fell within the target zone for anteversion and inclination.

Conclusion

Accurate component positioning in MIS posterolateral approach THA is possible and is not influenced by the type of stem.
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Metadata
Title
Does stem design influence component positioning in total hip arthroplasty using a minimal invasive posterolateral approach?
Authors
Wenzel Waldstein
Christian Merle
Tom Schmidt-Braekling
Friedrich Boettner
Publication date
01-07-2014
Publisher
Springer Berlin Heidelberg
Published in
International Orthopaedics / Issue 7/2014
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-014-2299-9

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