Double-Row Root Repair with Bridging Centralization Using Double Nonsliding Anchors for Medial Meniscus Posterior Root Tear.

Medial meniscal posterior root tears disrupt the "hoop" function of the meniscus and may lead to knee osteoarthritis. Although root repair could be a key to osteoarthritis prevention, this surgery does not necessarily guarantee an optimal result even when combined with meniscal centralization and high tibial osteotomy. To address this issue, we made five modifications to the original combined approach, namely two anchors to fix the root, instead of one; bridging centralization instead of single centralization; release of the meniscotibial capsule vs no release; release of valgus stress before knot tying vs no release; and prohibiting postoperative cross-legged sitting and sitting on heels. The advantages of this approach over the original approach are numerous and comprise ease of performing concurrent open wedge high tibial osteotomy, shorter fixation distance, better anatomical reattachment of the meniscal root, increased bone-meniscus contact and contact pressure, and larger contact area between the capsule and tibial rim. The disadvantages of the approach are that knot-tying is cumbersome, pie-crusting of the medial collateral ligament is necessary in patients not undergoing open wedge high tibial osteotomy, and tears >3 mm from the attachment are a contraindication. We describe the steps in this modified approach in detail.