Bone grows circumferentially. There is no evidence that the bone grows from the depth of the tunnel. I for one use 1 to 1.5 cm femoral tunnels as a quadruple semitendinosis graft is usually between 7.5 to 8 cm. Not had a known case of failure yet due to lack of ingrowth. The gracilis being intact provides an intact agonist for ACL and might help avoid the dysaesthesia from the infrapatellar branch of saphenous nerve. The density in the tunnels in the longer tibial and shorter femoral looks is ISODENSE.
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