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
Orthopedicsjournal_title
Orthopedicsauthors
Wassilew GI,Perka C,Koenig C,Janz V,Asbach P,Hasart Odoi
10.3928/01477447-20100510-53subject
Has Abstractpub_date
2010-10-01 00:00:00pages
48-51issue
10 Suppleissn
0147-7447issn
1938-2367journal_volume
33pub_type
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