Hypothesis: Supplemental aperture fixation with autogenous bone cores or bioabsorbable interference screws will decrease tibial tunnel widening in hamstring anterior cruciate ligament reconstruction.

• 设想：对于腘肌腱常见前交叉韧带者，对隧道口用自体骨或生物可吸收螺钉加强固定可减轻胫骨隧道的扩大。