Evaluation of the accuracy of femoral component orientation by the CT-based fluoro-matched navigation system

International Orthopaedics - Tập 37 - Trang 1063-1068 - 2013
Shinya Hayashi1, Takayuki Nishiyama1, Takaaki Fujishiro1, Shingo Hashimoto1, Noriyuki Kanzaki1, Kotaro Nishida1, Ryosuke Kuroda1, Masahiro Kurosaka1
1Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan

Tóm tắt

Accurate orientation of acetabular and femoral components are important during THA. However, no study has assessed the use of the CT-based fluoro-matched navigation system during THA. Therefore, we have evaluated the accuracy of stem orientation by CT-based fluoro-matched navigation. The accuracy of stem orientation by CT-based fluoro-matched navigation was assessed by postoperative CT data. Furthermore, we compared the postoperative stem orientation with the intraoperative registration errors. The average antetorsion error of the stem (navigation records − postoperative CT) was −0.5° ± 5.2°. The stem valgus error was 0.4° ± 2.7°. The accuracy of the navigation record for the orientation of the stem valgus was dependent on the intraoperative registration errors. The clinical accuracy of CT-based fluoro-matched navigation is adequate for stem alignment orientation, and the intraoperative verification of registration errors is valuable for checking the accuracy of stem orientation by navigation.

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International Orthopaedics

Tập 37

1063-1068

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