Rezaie Nima, Stroud Wesley R, Beason David P, Slowik Jonathan S, Dias Travis, Uldrich Grant M, Fleisig Glenn S, Dugas Jeffrey R
American Sports Medicine Institute Birmingham Alabama USA.
Andrews Sports Medicine and Orthopaedic Center Birmingham Alabama USA.
J Exp Orthop. 2025 Apr 16;12(2):e70240. doi: 10.1002/jeo2.70240. eCollection 2025 Apr.
Medial patellofemoral ligament (MPFL) reconstruction has been the standard of care for recurrent patellar dislocations and chronic patellar instability. MPFL repair has been used as an alternative surgical option. The purpose of this study was to assess patellar stability and patellofemoral contact mechanics following MPFL fixation with suture tape augmentation. We hypothesized that lateral patellar motion would be reduced.
In twelve cadaver knees, a hole was drilled near the midpoint of the medial patella. Three locations were drilled on the femur Schöttle's point, 1 cm anterior to Schöttle's point and 1 cm proximal to Schöttle's point. Each knee was then held at 30° of knee flexion, and the patella was subjected to a physiologic lateral force. The resulting motion was measured, and patellofemoral contact forces were recorded. This process was performed with the MPFL torn and then bolstered with suture tape augmentation anchored centrally in the medial patella and each of the three femur hole locations.
All MPFL augmentations provided significantly less lateral patellar motion compared to the torn condition. Contact area was significantly greater in the augmented condition than in the torn condition, but no statistical differences were observed in patellofemoral contact pressure. No significant differences in lateral patellar motion, contact pressure or contact area were found between femoral anchor positions.
MPFL fixation with suture tape augmentation significantly decreased lateral patellar motion compared to the torn condition without causing significant changes in contact pressures within the patellofemoral joint.
N/A.
内侧髌股韧带（MPFL）重建一直是复发性髌骨脱位和慢性髌骨不稳定的标准治疗方法。MPFL修复已被用作一种替代手术选择。本研究的目的是评估使用缝线带增强进行MPFL固定后髌骨的稳定性和髌股关节接触力学。我们假设髌骨的外侧运动将减少。
在12具尸体膝关节中，在内侧髌骨中点附近钻孔。在股骨上钻三个位置：朔特勒点、朔特勒点前方1厘米处和朔特勒点近端1厘米处。然后将每个膝关节保持在30°屈膝位，对髌骨施加生理性外侧力。测量由此产生的运动，并记录髌股关节接触力。这个过程在MPFL撕裂后进行，然后用缝线带增强进行支撑，缝线带集中固定在内侧髌骨和三个股骨钻孔位置中的每一个。
与MPFL撕裂的情况相比，所有使用缝线带增强的MPFL固定均使髌骨的外侧运动明显减少。增强状态下的接触面积明显大于撕裂状态，但髌股关节接触压力未观察到统计学差异。在不同的股骨锚定位置之间，髌骨外侧运动、接触压力或接触面积均未发现显著差异。
与MPFL撕裂的情况相比，使用缝线带增强进行MPFL固定可显著减少髌骨的外侧运动，且不会导致髌股关节内的接触压力发生显著变化。
无。
