Novel anatomical single bundle ACL reconstruction using a rounded rectangle femoral dilator

摘要

Background: During the past 10 years, the main trend for ACL reconstruction has shifted to anatomic reconstruction. There is no significant difference in the postoperative stability and clinical results between single and double bundle ACL reconstruction. So, an attention has returned to single bundle ACL reconstruction with grafts that are placed at the center of anatomical footprint. In the conventional circular femoral bone tunnel, creation of a large anatomical bone tunnel is not possible because of roof impingement. Several anatomical studies have reported that the femoral insertion of the ACL has a rounded rectangle shape, and we have also realized that the quadrupled semitendinosus tendons appear to be a rounded rectangle, rather than circular. Therefore, we created an original femoral dilator and developed a new ACL reconstruction technique: “Rounded rectangle femoral tunnel ACLR” (RFTR). This study aimed to compare the femoral tunnel size and clinical results between conventional anatomical single bundle ACL reconstruction (ASBR) and RFTR.