抄録
Genioplasty is a routine procedure for the improvement of profile in the correction of dentofacial deformities. Horizontal osteotomy of the inferior border of the mandible is usually performed. Osteotomized genial segment has conventionally been fixed with wire osteosyntheses. However, since this method had many disadvantages, use of rigid internal fixation with mini bone plates and screws or screws alone in genioplasty has spread. Rigid internal fixation provides a rapid and rigid means of stabilizing the inferior mandibular fragment after horizontal osteotomy, and is able to achieve the optimum bony union and the small resorption of bone. Moreover, screw fixation seems to have advantages over mini bone plates and screws, and also lag screw fixation seems to have advantages over position screw fixation.
In 1989, we began using lag screw fixation after horizontal osteotomy in genioplasty by the use of only one titanium mini non self-tapping screw in the median part of the chin, and this screw is inserted through inferior approach and fixed to the lingual cortex of the mandible.
So far, we have used it in 50 cases.
This method has the following advantages:
1. Excellent rigid osteosynthesis.
2. Easy and rapid procedure.
3. Easy removal.
