| 摘要 |
<p>A distraction apparatus for lengthening a lower jaw after cortical osteotomy, comprising: a distal anchoring screw (1), the screw section (2) of which is screwed into a bore in a rising branch of the lower jaw (ramus mandibularis) (3), and the free end of which has a polygonal head (4), preferably a hexagonal head, and a hinge bush (5); an expansion screw (6) which is hingedly connected to the above-mentioned anchoring screw (1) by means of a fastening screw (7), which also serves as a joint pivot which fits into the above-mentioned hinge bush (5); a screw stopper (8) which holds the joint member in a rigid position in an unchangeable direction, and a connecting piece (9) with internal screw thread (10) for the attachment of a fastening plate which is arranged, by means of screws (12), on one side of the chiselled-through mandibular arch.</p> |
