2007
DOI: 10.1007/s00167-006-0261-0
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Dynamic measurement of patellofemoral kinematics and contact pressure after lateral retinacular release: an in vitro study

Abstract: The purpose of this study was to investigate the influence of lateral retinacular release and medial and lateral retinacular deficiency on patellofemoral position and retropatellar contact pressure. Human knee specimens (n = 8, mean age = 65 SD 7 years, all male) were tested in a kinematic knee-simulating machine. During simulation of an isokinetic knee extension cycle from 120 degrees to full extension, a hydraulic cylinder applied sufficient force to the quadriceps tendon to produce an extension moment of 31… Show more

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Cited by 108 publications
(102 citation statements)
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“…An in vitro study by Ostermeier [50] showed that patellofemoral contact pressure did not change significantly with a lateral release except on the lateral facet in flexion and that it did not stabilize the patella through knee range of motion. Vaatainen [51] in a prospective study found that isolated lateral release for anterior knee pain reduced lateral patellar tilt but did not improve the functional capacity of patients at 4 years.…”
Section: Operative Treatmentmentioning
confidence: 99%
“…An in vitro study by Ostermeier [50] showed that patellofemoral contact pressure did not change significantly with a lateral release except on the lateral facet in flexion and that it did not stabilize the patella through knee range of motion. Vaatainen [51] in a prospective study found that isolated lateral release for anterior knee pain reduced lateral patellar tilt but did not improve the functional capacity of patients at 4 years.…”
Section: Operative Treatmentmentioning
confidence: 99%
“…5,6 Previously described as "patellar compression syndrome" or "excessive lateral pressure syndrome," the disorder is associated with overload and increased pressure on the lateral facet due to pathologic lateral soft-tissue restraints. 5,7,8 Contributing to the problem, an increased Q angle, indicative of patellofemoral malalignment, also results in greater surface contact between the lateral aspect of the patella and the lateral condyle of the femur during functional weightbearing activities. 9 As the knee is flexed, increased posterolateral compressive forces are exerted on the lateral aspect of the patella, which is consistent with the clinical observation that most patients with anterior knee pain tolerate prolonged knee flexion poorly.…”
mentioning
confidence: 99%
“…1 While in vitro experiments have improved the understanding of the mechanisms critical for load sharing between the active and passive structures of the PF joint, [2][3][4][5][6][7][8][9] knowledge of the actual in vivo PF joint forces during activities involving high knee flexion remains limited. 10,11 Computational models of the musculoskeletal system provide access to the internal loads at the tibiofemoral (TF) and PF joints based on external measurements, and can be used to systematically explore the effects of factors relevant to the internal loading conditions.…”
mentioning
confidence: 99%