Surgeon error in performing intraoperative estimation of stem anteversion in cementless total hip arthroplasty

Masanobu Hirata, Yasuharu Nakashima, Masanobu Ohishi, Satoshi Hamai, Daisuke Hara, Yukihide Iwamoto

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

To examine the accuracy of intraoperative estimation of stem anteversion in total hip arthroplasty (THA), we compared the intraoperatively estimated stem anteversion (estimated prosthetic anteversion) to stem anteversion measured by postoperative computed tomography (true anteversion) in 73 hips in 73 patients. Estimated prosthetic anteversion was significantly greater than true anteversion by 5.8°, and the mean absolute value of surgeon error was 7.3° ranging from 11° underestimation to 25° overestimation. Surgeons tended to overestimate when the true anteversion was smaller. A multivariate analysis showed that advanced knee osteoarthritis significantly increased surgeon error. These results indicated that estimated prosthetic anteversion was generally larger than true anteversion and that the grade of knee osteoarthritis affected the degree of surgeon error.

Original languageEnglish
Pages (from-to)1648-1653
Number of pages6
JournalJournal of Arthroplasty
Volume28
Issue number9
DOIs
Publication statusPublished - Oct 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

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