AANA19 Knee Access Pass-Relationship between Graft Force and Tuberosity Position Following MPFL Reconstruction-Dr. Miho Jean Tanaka, M.D., MA.

Relationship between Graft Force and Tuberosity Position Following MPFL Reconstruction-Dr. Miho Jean Tanaka, M.D., MA.

Video Transcription

Video Summary

This study evaluated anatomical factors influencing medial patellofemoral ligament (MPFL) graft loading in patellar instability patients using dynamic knee simulations from 14 subjects. Findings show MPFL reconstruction reduces patellar lateralization and tilt, with graft forces highest near full extension and minimal load beyond 30° flexion. The tibial tuberosity–posterior cruciate ligament (TTPCL) distance strongly correlated with maximum graft tension, especially when graft tension was more restrictive. Trochlear dysplasia and patellar height had no significant effect on graft force. Results suggest that tibial tuberosity medialization should be considered in patients with elevated TTPCL to prevent excessive graft tension.

Keywords

medial patellofemoral ligament

patellar instability

graft tension

tibial tuberosity–posterior cruciate ligament distance

dynamic knee simulation