@article{Stephen:2016:10.1177/0363546516631736,
author = {Stephen, JM and Kittl, C and Williams, A and Zaffagnini, S and Marcheggiani, Muccioli GM and Fink, C and Amis, AA},
doi = {10.1177/0363546516631736},
journal = {American Journal of Sports Medicine},
pages = {1186--1194},
title = {Effect of medial patellofemoral ligament reconstruction method on patellofemoral contact pressures and kinematics.},
url = {http://dx.doi.org/10.1177/0363546516631736},
volume = {44},
year = {2016}
}

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TY  - JOUR
AB  - BACKGROUND: There remains a lack of evidence regarding the optimal method when reconstructing the medial patellofemoral ligament (MPFL) and whether some graft constructs can be more forgiving to surgical errors, such as overtensioning or tunnel malpositioning, than others. HYPOTHESIS: The null hypothesis was that there would not be a significant difference between reconstruction methods (eg, graft type and fixation) in the adverse biomechanical effects (eg, patellar maltracking or elevated articular contact pressure) resulting from surgical errors such as tunnel malpositioning or graft overtensioning. STUDY DESIGN: Controlled laboratory study. METHODS: Nine fresh-frozen cadaveric knees were placed on a customized testing rig, where the femur was fixed but the tibia could be moved freely from 0° to 90° of flexion. Individual quadriceps heads and the iliotibial tract were separated and loaded to 205 N of tension using a weighted pulley system. Patellofemoral contact pressures and patellar tracking were measured at 0°, 10°, 20°, 30°, 60°, and 90° of flexion using pressure-sensitive film inserted between the patella and trochlea, in conjunction with an optical tracking system. The MPFL was transected and then reconstructed in a randomized order using a (1) double-strand gracilis tendon, (2) quadriceps tendon, and (3) tensor fasciae latae allograft. Pressure maps and tracking measurements were recorded for each reconstruction method in 2 N and 10 N of tension and with the graft positioned in the anatomic, proximal, and distal femoral tunnel positions. Statistical analysis was undertaken using repeated-measures analyses of variance, Bonferroni post hoc analyses, and paired t tests. RESULTS: Anatomically placed grafts during MPFL reconstruction tensioned to 2 N resulted in the restoration of intact medial joint contact pressures and patellar tracking for all 3 graft types investigated (P > .050). However, femoral tunnels positioned proxim
AU  - Stephen,JM
AU  - Kittl,C
AU  - Williams,A
AU  - Zaffagnini,S
AU  - Marcheggiani,Muccioli GM
AU  - Fink,C
AU  - Amis,AA
DO  - 10.1177/0363546516631736
EP  - 1194
PY  - 2016///
SN  - 1552-3365
SP  - 1186
TI  - Effect of medial patellofemoral ligament reconstruction method on patellofemoral contact pressures and kinematics.
T2  - American Journal of Sports Medicine
UR  - http://dx.doi.org/10.1177/0363546516631736
UR  - http://hdl.handle.net/10044/1/30842
VL  - 44
ER  - 

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