Medial Over-Resection of the Tibia in Total Knee Arthroplasty for Varus Deformity Using Computer Navigation

• Published in: The Journal of arthroplasty 2015-05, Vol.30 (5), p.766-769
• Main Authors: Krackow, Kenneth A., MD, Raju, Sivashanmugam, MS Ortho, Puttaswamy, Mohan K., MBBS, MS Ortho
• Format: Article
• Language: English
• Subjects: Aged; Arthroplasty, Replacement, Knee - methods; Bone Cements; Computer Simulation; Humans; Knee - surgery; Knee Joint - surgery; Male; medial overresection; Middle Aged; navigated TKA; Orthopedics; Osteoarthritis, Knee - surgery; Osteotomy - methods; reduction osteotomy; Retrospective Studies; Severity of Illness Index; Stress, Mechanical; tension stress examination; Tibia - surgery; Treatment Outcome; varus OA knee
• ISSN: 0883-5403; 1532-8406
• DOI: 10.1016/j.arth.2014.11.034

Abstract We are reporting a series of 35 cases in which downsizing, lateralizing of the tibial baseplate and resection of the uncovered medial plateau bone releases the medial collateral ligament and tightens the lateral collateral ligament. Result in excellent ligamentous balance and correction to neutral mechanical axis. The mean follow up was 32.8 months (11-95 months) and the average pre-operative varus was 9.47° (3.5-15°) with the average post-operative alignment was 0.65° varus. We obtained a mean correction of 0.45° for every mm (millimeter) of bone resected. We did not have any varus collapse or instability. Medial Over-resection could be employed as a technique in the management of varus OA knee with 2 mm of resection giving about 10 correction of deformity