Maxillofacial anchoring system for alveolar and small bone skeletal distraction

摘要

A maxillofacial anchoring and distraction system having an internally threaded anchoring or distraction fixture ( 12 ) and a selected length jack screw ( 14 ) for placement in an osteotomy. To minimize required bone height, a cut-away bone screw ( 16 ) or a solid mesh tip ( 17 ) is provided for insertion in bone in a direction generally perpendicular to the longitudinal axes of the anchoring and jack screws. A flat surface portion ( 16 c, 17 a) serves as a reaction surface for the distal end of the jack screw. In a second embodiment a sealing screw ( 24 ) is used with distraction fixture ( 20 ) modified to include a sealing surface. After completion of distraction the sealing screw is used to seal off the distraction fixture for conversion into an implant suitable for receiving conventional prosthetic components.