Wilson T W, Zafuta M P, Zobitz M
University of Texas Southwestern Medical School, Department of Orthopaedic Surgery, USA.
Am J Sports Med. 1999 Mar-Apr;27(2):202-7. doi: 10.1177/03635465990270021501.
Biomechanical testing was done on 15 matched pairs of central-third bone-patellar tendon-bone and double-looped semitendinosus-gracilis grafts harvested from 15 cadaveric knees. Load to failure, composite graft stiffness, and the modulus of elasticity were calculated for each graft. Specimens were from 2 female and 13 male donors (average age, 40 years; range, 17 to 53). Average load to failure for the patellar tendon grafts was 1784 N (+/- 580), compared with 2422 N (+/- 538) for the hamstring tendon grafts (significantly different). There was no statistically significant difference in stiffness between grafts (patellar tendon, 210 N/mm; hamstring tendon, 238 N/mm). The elastic modulus was 225 MPa (+/- 129) for the patellar tendon grafts and 145 MPa (+/- 58) for the hamstring tendon grafts (significantly different). The average cross-sectional area for the hamstring tendon grafts was 57 mm2, compared with the 45 mm2 for the patellar tendon grafts. The hamstring tendon grafts were significantly stronger than the matched central-third patellar tendon grafts, but the two grafts were similar in stiffness. The patellar tendon grafts had a higher modulus than the hamstring tendon grafts.
对取自15具尸体膝关节的15对匹配的中央三分之一骨 - 髌腱 - 骨和双环半腱肌 - 股薄肌移植物进行了生物力学测试。计算了每个移植物的破坏载荷、复合移植物刚度和弹性模量。标本来自2名女性和13名男性供体（平均年龄40岁；范围17至53岁）。髌腱移植物的平均破坏载荷为1784 N（±580），而绳肌移植物为2422 N（±538）（差异显著）。移植物之间的刚度无统计学显著差异（髌腱，210 N/mm；绳肌，238 N/mm）。髌腱移植物的弹性模量为225 MPa（±129），绳肌移植物为145 MPa（±58）（差异显著）。绳肌移植物的平均横截面积为57 mm2，而髌腱移植物为45 mm2。绳肌移植物比匹配的中央三分之一髌腱移植物明显更强，但两种移植物在刚度上相似。髌腱移植物的模量高于绳肌移植物。
