Dynamic Contact Mechanics of the Medial Meniscus as a Function of Radial Tear, Repair, and Partial Meniscectomy

Effect of partial meniscectomy at the medial posterior horn on tibiofemoral contact mechanics and meniscal hoop strains in human knees

“…Whether the use of passive loading without muscle simulation and with patellar dissection affects our conclusions is unknown. Bedi et al 25 investigated the influence of partial meniscectomy on contact mechanics using a dynamic knee simulator. Neither CP max nor CA were affected by considerably different AP forces and tibial rotation moments occurring at two phases of stance after partial meniscectomy.…”

Analysis of a New All-Inside Versus Inside-Out Technique for Repairing Radial Meniscal Tears

“…Bedi et al 2 showed that large radial meniscal tears (up to 90% of the width) did not significantly increase tibiofemoral contact pressures, but partial meniscectomies did. For this reason, if radial tears can be repaired, it may be possible to preserve nearly normal tibiofemoral contact pressures and minimize the risk of degenerative arthrosis.…”

“…1 When the peripheral circumferentially oriented fibers of the meniscus are disrupted, the tissue's ability to resist hoop stresses is lost, leading to increased contact pressures and an early onset of arthrosis. [2][3][4] All-inside devices have been developed to pass sutures arthroscopically in an effort to treat meniscal tears without anchoring devices or a separate incision. Previous investigations by our group have shown that all-inside devices have compared poorly to an insideout technique for longitudinal tears of the meniscus.…”

Meniscectomy: The Basics

“…Often most of the lower lamina is sacrifi ced leaving a nearly intact and stable superior rim. Recent studies suggest that even remaining fragments of meniscal tissue still afford some chondral protection [ 3 ].…”