Beynnon B D, Proffer D, Drez D J, Stankewich C J, Johnson R J
McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, University of Vermont, College of Medicine, Burlington 05405, USA.
Am J Sports Med. 1995 Jul-Aug;23(4):452-7. doi: 10.1177/036354659502300414.
The objective of this study was to determine the biomechanical properties of the healing patellar tendon after removal of its central third. This was accomplished by removing the central third of the patellar tendon from the right limb of 30 mature New Zealand White rabbits. The tendon of the contralateral normal limb served as the unoperated control. The rabbits were separated into five test groups according to healing time: time of surgery and 1, 2, 3, and 6 months after surgery. The ultimate failure strength of the patellar tendons with the central third removed was significantly less than the failure strength of the contralateral normal patellar tendons at all time intervals after surgery. At the time of surgery, the ultimate failure strength values of the operated patellar tendons were on average 53% of the normal patellar tendons, increasing to 72% of normal at 6 months. There was a significant correlation between the ultimate failure strength of the operated tendons and healing time. The positive slope for this regression indicated that the ultimate failure strength of the operated tendons converged toward normal as healing progressed. Failure mode of the operated tendon did not depend on healing time.
本研究的目的是确定切除髌腱中央三分之一后其愈合过程中的生物力学特性。通过切除30只成年新西兰白兔右下肢髌腱的中央三分之一来实现这一目的。对侧正常肢体的肌腱作为未手术对照。根据愈合时间将兔子分为五个测试组：手术时间以及术后1、2、3和6个月。在术后所有时间间隔，切除中央三分之一的髌腱的极限破坏强度均显著低于对侧正常髌腱的破坏强度。在手术时，手术侧髌腱的极限破坏强度值平均为正常髌腱的53%，在6个月时增至正常的72%。手术肌腱的极限破坏强度与愈合时间之间存在显著相关性。该回归的正斜率表明，随着愈合进程，手术肌腱的极限破坏强度趋向于正常。手术肌腱的破坏模式不取决于愈合时间。
