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Osteochondral Lesions of the Talus: Computer-assisted Retrograde Drilling—Feasibility and Accuracy in Initial Experiences¹

¹ From the Interdisciplinary Stereotactic Interventional Planning Laboratory at the Department of Radiology (R.J.B., M.R.), the Department of Traumatology (C.H., R.R., K.P.B., C.F.), and Institute of Anatomy (R.R.), University of Innsbruck, Anichstrasse 35, A-6020 Innsbruck, Austria. From the 1999 RSNA scientific assembly. Received December 6, 1999; revision requested January 10, 2000; final revision received April 25; accepted May 8. Supported by the Lorenz Boehler Gesellschaft-Verein zur Förderung der Forschung auf dem Gebiet der Unfallchirurgie (Project 2/99). Address correspondence to R.J.B. (e-mail: reto.bale@uibk.ac.at).

The authors developed a minimally invasive method with computer-assisted navigation for retrograde drilling of osteochondral lesions of the talus. Planning of the pathway and adjustment of the targeting device were performed outside the operating room. In 10 cadavers and four patients, accuracy of pin placement was in the range of 1.0–3.5 mm.

Index terms: Computed tomography (CT), three-dimensional, 4641.12117 • Computers, examination control • Osteochondritis dissecans, 4641.442 • Stereotaxis, 4641.1267

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