The Oxford Medial Unicompartmental Knee Arthroplasty has specific selection criteria. Which finding is a CONTRAINDICATION to this implant?

• A Isolated anteromedial osteoarthritis with full thickness cartilage loss medially
• B Intact anterior cruciate ligament with correctable varus deformity
• C Functioning medial collateral ligament with passively correctable deformity
• D Deficient anterior cruciate ligament with fixed flexion deformity greater than 15 degrees ✓

Explanation

The Oxford mobile-bearing unicompartmental knee requires intact cruciate and collateral ligaments, since the mobile bearing depends on ligament-guided kinematics. ACL deficiency and fixed flexion deformity over about 15 degrees are explicit contraindications because they cause bearing dislocation and overload. Isolated anteromedial arthritis with intact ligaments and correctable deformity is precisely the indicated scenario.

Reference: Miller's Review of Orthopaedics, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.