, Volume 128, Issue 4, pp 429-434
Date: 11 Dec 2007

Intraoperative navigation in hip surface arthroplasty: a radiographic comparative analysis study

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Abstract

Background

The goal of the current prospective randomised radiological study was to determine the accuracy of conventional and computer-assisted femoral component implantation in surface arthroplasty (SRA).

Methods

We analysed on standard radiographs the femoral component positions after 30 conventional instrumented (Group 1) and 30 navigated (Group 2) SRA femoral components. We evaluated: varus or valgus orientation, horizontal femoral offset and translation of the component.

Results

The tendency to implant the femoral component in mild valgus position (2.8° in Group 1 compared to 2.1° in Group 2), more distally and ventrally in the femoral neck (in Group 1) and with femoral off-set increase (4.8 mm in Group 1 compared to 3.4 mm in Group 2) was found.

Conclusions

The navigation system enables a more accurate insertion of the femoral component.