Computer Navigation with Posterior MIS Total Hip Arthroplasty
The majority of literature on computer-assisted surgery of the hip shows how navigation assists the surgeon in more accurate component placement as compared with techniques that use mechanical guides or are freehand.1–5 Our work has been with imageless navigation technology, which allows real-time intraoperative knowledge of the quantitative direction and depth of reaming; adjustment during reaming for variations in the bony anatomy to allow for correct cup coverage with optimal inclination; and adjustment of the anteversion of a cup to a desired combined anteversion through knowledge of the fixed femoral anteversion.6
We have validated the results of the imageless computer navigation by comparison with postoperative computed tomography (CT) scans, which are considered the gold standard. We also compared the precision of the computer with postoperative radiographs and with the surgeons’ estimates of cup position.
KeywordsMinimally Invasive Surgery Acetabular Component Pelvic Tilt Computer Navigation Femoral Anteversion
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