Computer-Assisted Femoral Head-Neck Osteochondroplasty Using a Surgical Milling Device: An In Vitro Accuracy Study

Ecker, Timo M.; Puls, Marc; Steppacher, Simon D.; Bastian, Johannes D.; Keel, Marius J.B.; Siebenrock, Klaus A.; Tannast, Moritz

doi:10.1016/j.arth.2011.03.048

« Previous Next »The Journal of Arthroplasty
Volume 27, Issue 2 , Pages 310-316, February 2012

Computer-Assisted Femoral Head-Neck Osteochondroplasty Using a Surgical Milling Device:

An In Vitro Accuracy Study

Timo M. Ecker, MD
- Reprint requests: Marc Puls, PhD, Department of Orthopedic Surgery, Inselspital, University of Berne, 3007 Berne, Switzerland.
- Department of Orthopedic Surgery, Inselspital, University of Berne, Switzerland
Marc Puls, PhD
- Department of Orthopedic Surgery, Inselspital, University of Berne, Switzerland
- Institute for Surgical Technology and Biomechanics, University of Berne, Switzerland
Simon D. Steppacher, MD
- Department of Orthopedic Surgery, Inselspital, University of Berne, Switzerland
Johannes D. Bastian, MD
- Department of Orthopedic Surgery, Inselspital, University of Berne, Switzerland
Marius J.B. Keel, MD, FACS
- Department of Orthopedic Surgery, Inselspital, University of Berne, Switzerland
Klaus A. Siebenrock, MD
- Department of Orthopedic Surgery, Inselspital, University of Berne, Switzerland
Moritz Tannast, MD
- Department of Orthopedic Surgery, Inselspital, University of Berne, Switzerland

Received 23 September 2010; accepted 2 March 2011. published online 30 May 2011.

Abstract

Surgical navigation might increase the safety of osteochondroplasty procedures in patients with femoroacetabular impingement. Feasibility and accuracy of navigation of a surgical reaming device were assessed. Three-dimensional models of 18 identical sawbone femora and 5 cadaver hips were created. Custom software was used to plan and perform repeated computer-assisted osteochondroplasty procedures using a navigated burr. Postoperative 3-dimensional models were created and compared with the preoperative models. A Bland-Altmann analysis assessing α angle and offset ratio accuracy showed even distribution along the zero line with narrow confidence intervals. No differences in α angle and offset ratio accuracy (P = 0.486 and P = 0.2) were detected between both observers. Planning and conduction of navigated osteochondroplasty using a surgical reaming device is feasible and accurate.

Keywords: hip, Femoroacetabular impingement, surgical navigation, arthroscopy, head-neck osteochondroplasty