3D CT analysis of combined cup and stem anteversion in cases of cup navigation in hip arthroplasty.

Abstract:

:Navigation of the cup in total hip arthroplasty is well analyzed and shows accurate results, reducing cup outliers of Lewinnek's "safe zone." With regard to the combined anteversion of cup and stem, however, a "new" safe zone with a range of 25° to 50° has been published. The aim of this study was to analyze total anteversion (cup and stem) by postoperative 3D computed tomography in isolated cup navigation cases. In 46 patients, the mean combined anteversion was 34.4° (range, 16.3°-57.3°, SD ± 9.3°) with 10 outliers. The mean cup anteversion was 19.5° (range, 11°-27°, SD ± 3.7°). Regarding Lewinnek's "safe zone" (cup only), we observed 5 outliers. An improvement of technique of stem implantation or navigation may reduce outliers of combined anteversion.

journal_name

Orthopedics

journal_title

Orthopedics

authors

Wassilew GI,Perka C,Koenig C,Janz V,Asbach P,Hasart O

doi

10.3928/01477447-20100510-53

subject

Has Abstract

pub_date

2010-10-01 00:00:00

pages

48-51

issue

10 Suppl

eissn

0147-7447

issn

1938-2367

journal_volume

33

pub_type

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