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Medial Collateral Ligament Rupture in Medial-Pivot Total Knee Arthroplasty

Hassan Zmerly1,2,3, Silvio Caravelli4, Andrea Vescio5

  • 11st Unit of Orthopaedics, Villa Erbosa, Bologna, ITA.

Cureus
|August 13, 2026
PubMed
Summary

Medial collateral ligament (MCL) rupture after knee replacement is rare but serious. Revision surgery with a constrained implant successfully restored stability in a patient with sarcopenic obesity.

Keywords:
medial collateral ligament injurymedial pivotrevision knee arthroplastysarcopenic obesitytotal knee arthroplasty (tka)

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Knee Joint01:23

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...