INTRAORAL MANDIBULAR DISTRACTOR CUSTOMIZED AND USE OF SUCH A DISTRACTOR TO OBTAIN CONTINUOUS DISTRACTION

摘要

The invention relates to a tailor-made intraoral mandibular distractor, of the type comprising two anchoring means (1, 2) fixed in the mandibular body at fixed anchoring points located on either side of the bone callus. Such a distractor is characterized in that it comprises: a) a threaded cylindrical rail (6) connecting the two anchoring means (1, 2), b) a movable carriage (10) slidably guided on the rail (6). ) and fixed on the bone segment to be distracted, said mobile carriage being equipped with a worm (11) whose thread is complementary to that of the rail and cooperates with the latter, c) an axis (12) integral with the screw endless (11) and controlling the rotation thereof, said axis, parallel to the rail (6), being supported by two bearings (13, 14) arranged on the movable carriage (10), on both sides of the worm, d) at least one elastic washer (15) which is traversed by said axis (12) and which bears against one end (16) of the worm (11) and against the inner wall (18). ) of the bearing (14) facing said end (16). Applicable to osteogenic distraction reconstruction of a missing or deficient bone segment.