Maxillofacial anchoring system for alveolar and small bone skeletal distraction

A maxillofacial anchoring and distraction system comprising

• an anchoring screw body having an upper side and a lower side and having a longitudinal axis and having a longitudinally extending threaded bore extending through the anchoring screw body from the upper side to the lower side, the anchoring screw body having an external bone screw thread,
• an elongated generally cylindrical member having head and distal ends and a longitudinal axis, an externally threaded portion for threaded engagement in the threaded bore of the anchoring screw body, the generally cylindrical member being capable of being inserted in the bore of the anchoring screw body with the distal end inserted from the upper side and the distal end configured so that it can extend out of the threaded bore beyond the lower side of the anchoring screw body and formed with a distraction force transferring surface, the head end including a driving surface, and the distal end having a selected diameter, and
• a reaction element having a mesh fixation base plate having a plurality of holes formed therethrough and formed with a solid flat surface portion for engagement with the distraction force transferring surface of the distal end of the generally cylindrical member when the cylindrical member is in threaded engagement with the anchoring screw body, the flat surface portion extending along a selected axis a distance greater than the diameter of the distal end of the elongated generally cylindrical member to facilitate lateral alignment of the flat surface portion with the end surface of the distal end, the flat surface portion to serve as an engagement surface to distract against when the flat surface portion of the reaction element is placed in a horizontally extending osteotomy in a bone with the flat surface portion of the reaction element generally perpendicular relative to the longitudinal axis of the anchoring screw body and the elongated cylindrical member.