Fixation screw and method for ligament reconstruction

Abstract

Abstract A screw for fixation of a tendon/bone graft during an arthroscopic surgical procedure includes a smooth conical forward end having a rounded tip and a spiral thread running from a position behind the smooth rounded forward end to a rearward end of the screw. The depth of the thread is shallower than a conventional screw and the exterior edge of the thread is rounded to decrease cutting and fragmentation of the tendon and bone. The screw includes an internal bore with left- and right-handed threaded portions for engagement with insertion and extraction instruments. In the method, the bone graft is harvested and sized as desired. A graft socket is drilled in the bone and then serially sized with increasingly larger sizing instruments to compact the bone and size the graft socket to the graft. A smooth bore screw socket is created by serially dilating a space between the graft and graft socket with increasingly larger dilating instruments, thereby also compacting the graft. The appropriately sized fixation screw is then inserted into the screw socket with the insertion instrument to fix the graft to the bone.

Inventors

• 👤 Lanny L. Johnson

Bibliographic Details