Abstract
We performed a prospective analysis of 29 Fulkerson anteromedial tibial tubercle transfers in patients with chronic anterior knee pain. The average followup was 32 months (range, 25 to 44). Fourteen patients (Group 1) had subluxation-type malalignment (congruence angle > 20 degrees, tilt angle > 8 degrees) and were treated with an isolated anteromedial tibial tubercle transfer. Fifteen patients (Group 2) had combined subluxation and tilt malalignment (congruence angle > 20 degrees, tilt angle < 8 degrees) and underwent anteromedial tibial tubercle transfer combined with a lateral release. Pre- and postoperative evaluations included clinical and radiographic examinations, Lysholm and Kujala patellofemoral scores, and standing-alignment computed tomography scans in 15 degrees of flexion taken transversely at the midpatellar. In all but one patient a dramatic improvement in Lysholm and Kujala scores was noted. The congruence angle improved in all patients except one, with an average improvement of 16 degrees in Group 1 and of 14 degrees in Group 2. The tilt angle remained relatively unchanged (change, -0.5 degree) in Group 1, but it improved by 11 degrees in Group 2. We conclude that an isolated anteromedial tibial tubercle transfer can consistently improve patellar subluxation and, when combined with a lateral release, can improve patellar subluxation and tilt, resulting in improved functional scores for patients with chronic anterior knee pain.
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