Apparatus for rigidly fixing craniomaxillofacial tissue grafts and bone plates

摘要

A self-drilling and tapping multi-drive bone screw (10) for rigid fixation of craniomaxillofacial tissue grafts and bone plates has a tip (12a) which incorporates a defined twist drill shaft with a sharp cutting point tip (12b) to easily pierce and drill a pilot hole and prepare for the insertion of self-tapping screw threads (12c). A cylindrical dome shaped head (14) for rigid fixation of craniomaxillofacial tissue grafts and geometrically sized bone plates is formed on the screw distal to the drilling and tapping features. A spline feature (14e) is incorporated into the cylindrically dome shaped head for easy pickup, assembly and insertion of the bone screw with a corresponding spline driver tool (20). The spline driver feature also allows the bone screw (10) to be driven with either a standard square or cross blade driver tool.