Mazzocca Augustus D, Nissen Carl W, Geary Michael, Adams Douglas J
Dept of Orthopedic Surgery, University of Connecticut Health Center, 10 Talcott Notch Rd, MC 4037, Farmington, CT 06034-4037, USA.
J Knee Surg. 2003 Jul;16(3):148-51.
This study tested the hypothesis that application of a valgus force necessary to create a complete medial collateral ligament (MCL) injury causes damage to the anterior cruciate ligament (ACL). Twelve cadaveric knees were used to measure concomitant loading and damage to the ACL in valgus knee loading sufficient to cause a grade III MCL injury. Displacement sensors were placed on the anteromedial bundle of the ACL and posterior oblique ligament to monitor tensile strain during creation of the MCL injury. A valgus moment was applied to knees flexed at 30 degrees, displacing the joint into valgus rotation beyond MCL rupture. Following valgus loading and MCL injury, femur-ACL-tibia specimens were tested to failure to compare ACL mechanical integrity to noninjured control specimens. Average ACL strength in MCL ruptured knees (1250 +/- 90 N) was statistically lower (P < or = .05) than that for control knees (2110 +/- 50 N). Strain measurements exhibited concomitant posterior oblique ligament strain during valgus loading, whereas ACL strain increased substantially only after MCL rupture. These data indicate that the ACL can be compromised in isolated grade III MCL injuries.
施加造成完全性内侧副韧带（MCL）损伤所需的外翻力会导致前交叉韧带（ACL）损伤。使用12个尸体膝关节来测量在足以导致III度MCL损伤的膝关节外翻加载过程中ACL的伴随负荷及损伤情况。将位移传感器置于ACL前内侧束和后斜韧带，以监测MCL损伤形成过程中的拉伸应变。对屈曲30度的膝关节施加外翻力矩，使关节向外侧旋转直至MCL断裂。在进行外翻加载和MCL损伤后，对股骨-ACL-胫骨标本进行破坏试验，以比较ACL与未受伤对照标本的力学完整性。MCL断裂的膝关节中ACL的平均强度（1250±90 N）在统计学上低于对照膝关节（2110±50 N）（P≤0.05）。应变测量显示在外翻加载过程中后斜韧带应变同时出现，而ACL应变仅在MCL断裂后大幅增加。这些数据表明，单纯的III度MCL损伤可能会损害ACL。
