Does severity of femoral trochlear dysplasia affect outcome in patellofemoral instability treated by medial patellofemoral ligament reconstruction and anterior tibial tuberosity transfer

摘要: Abstract Introduction Medial patellofemoral ligament (MPFL) reconstruction associated to anterior tibial tuberosity transfer (ATTT) is recommended in objective instability (PFI). Efficacy, however, has not been precisely determined trochlear dysplasia with spur. A case-control study was performed a PFI population, comparing groups and without spur (S+ vs. S−) assess the impact of on (1) stability, (2) functional results complications, (3) cartilage status MRI. Hypothesis Trochlear does affect outcome managed by MPFL ATTT. Material methods Twenty-eight knees (26 patients) were analyzed retrospectively divided into 2 14 each according presence S−). All 28 had undergone ATTT semitendinosus autograft. Results assessed Lille IKDC scores, MRI at last follow-up. At mean 24 months’ follow-up (range, 12–52 months), there no recurrence dislocation. scores tended improve both groups, although only significant improvement score (S− gain, 21.3 ± 16; S+ 18.1 ± 14) ( P  = 0.01). better than S− group (79 ± 19 [range, 21–92] 68 ± 13 35–84], respectively;  = 0.012). showed inter-group differences gain  = 0.492) or value  = 0.381). The more lesions n  = 14/14 knees, including 12/14 grade ≥ 2 lesions)  = 9/14 all grade ≤ 2). Conclusion provided good short-term stability independently severity dysplasia. Functional IKDC, poorer case This probably due lesions, observed frequently pre- post-operatively group, especially as difference Score, which highlights stability. Level evidence III, retrospective study.