No previous study has investigated poly-L-lactic acid (PLLA) surgical mesh augmentation in the repair of inferior pole patellar tendon rupture. We compared the biomechanical properties of transosseous patellar tendon repair with PLLA surgical mesh augmentation to transosseous repair without augmentation. Ten matched pairs of cadaveric knees were used. Specimens in each pair were randomized to undergo the transosseous technique alone or the transosseous technique augmented with a PLLA surgical mesh. An inferior pole patellar tendon rupture was simulated and the repair procedure was performed. Specimens were cyclically loaded for 500 cycles. Gap formation was measured using two sensors placed medial and lateral to the repair site. After cyclic loading, load to failure was determined by pulling the tendon at a constant rate until a sudden decrease in load occurred. The primary outcome measure was cyclic gap formation at the medial and lateral sensors. Compared with controls, specimens that underwent PLLA mesh-augmented repair had significantly lower medial gap formation at all testing intervals up to 500 cycles (p < 0.05) and significantly lower lateral gap formation at all testing intervals from 10 to 500 cycles (p < 0.05). Transosseous patellar tendon repair augmented with a PLLA woven mesh device provided significantly greater resistance to gap formation compared with transosseous repair alone. These results suggest that PLLA mesh augmentation of the transosseous technique is biomechanically effective for patellar tendon repair.

之前没有研究调查聚左旋乳酸（PLLA）手术补片在修复下极髌腱断裂中的作用。我们比较了使用 PLLA 手术网片增强的经骨髌腱修复术与不增强的经骨修复术的生物力学特性。使用十对匹配的尸体膝盖。每对样本均随机接受单独的经骨技术或使用 PLLA 手术网增强的经骨技术。模拟髌骨下极肌腱断裂并进行修复手术。样本循环加载 500 个周期。使用放置在修复部位内侧和外侧的两个传感器测量间隙形成。循环加载后，通过以恒定速率拉动肌腱直至发生负载突然下降来确定失效负载。主要结果指标是内侧和外侧传感器的循环间隙形成。与对照相比，接受 PLLA 网片增强修复的标本在 500 个周期以内的所有测试间隔内的内侧间隙形成均显着降低 ( p  < 0.05)，在 10 至 500 个周期的所有测试间隔内，外侧间隙形成均显着降低 ( p  < 0.05) ）。与单独的经骨修复相比，使用 PLLA 编织网装置增强的经骨髌腱修复对间隙形成具有显着更大的抵抗力。这些结果表明，经骨技术的 PLLA 网片增强技术对于髌腱修复在生物力学上是有效的。