REPEATED MANDIBULAR LENGTHENING IN COLLINS,TREACHER SYNDROME - A CASE-REPORT

A patient with mandibular hypoplasia associated with Treacher Collins syndrome was treated by bilateral distraction osteogenesis. Since less than optimal length was provided by the first distraction, a second c orticotomy was performed in the newly formed bone 6 months after the f irst distraction. Thus, bone gained by distraction osteogenesis was su bjected to distraction once again. New bone formation occurred after t he second lengthening. This case illustrates that distraction osteogen esis may be applied to the mandible at the site of previous distractio n.