Cyclic Testing of 3 Medial Patellofemoral Ligament Reconstruction Techniques (SS-77)

摘要: BACKGROUND Several techniques are available to secure the graft patella during medial patellofemoral ligament (MPFL) reconstruction. The biomechanical properties of these remain unknown. PURPOSE To compare 3 MPFL patellar fixation techniques: bone tunnels (BT), PushLock anchors (PL), and tenodesis screws (TS). STUDY DESIGN Controlled laboratory study. METHODS Forty-five reconstructions were performed using different reconstruction (BT, PL, TS). specimens randomly assigned, with 15 in each groups. Cyclic loading (500 cycles) load-to-failure testing performed. Gap formation after 100 500 cycles, ultimate load failure, stiffness measured. RESULTS Six constructs failed cyclic loading, 5 PL group (33%) 1 TS (6.7%). After differences gap found between BT groups (4.48 vs 3.62 mm, P < .03) 2.28 .0001). (6.63 4.16 .002) (7.89 .005). was have a lower failure when compared (161.4 258.3 N, = .019) 237.1 .009). Group did not reach statistical significance among (PL, 33.72 N/mm; BT, 37.50 TS, 43.00 N/mm). CONCLUSION more ideal than group, as demonstrated by less displacement higher failure. CLINICAL RELEVANCE Fixation limbs may be optimized use or over technique.