[Distraction osteogenesis for treatment of temporomandibular joint ankylosis].
OBJECTIVE
To study the application of distraction osteogenesis in temporomandibular joint (TMJ) ankylosis patients.


METHODS
11 temporomandibular joint ankylosis patients (13 sides of TMJ) were treated by this technique. After removal of bony mass on the ankylosis area, a L-shape osteotomy of the ramus was performed to create the distraction transport disc which connected the mandible by distractor. Distractions were started on the 4 approximately 8th postoperative day. The distraction rhythm and rate were 0.25 mm 4 times a day. Distraction was stopped when contact was made between the transport disc and glenoid fossa. The patients underwent active mouth opening postoperatively. Distractor was kept in place for 3 approximately 4 months after completion of distraction and then removed under local anesthesia.


RESULTS
Postoperatively, the range of mouth opening of the 11 patients (13 sides) was increased to normal (33 approximately 45 mm), bone formation in the gaps were perfect and the neocondyle was remodeling and approximated normal shape. No complications were found.


CONCLUSIONS
Distraction osteogenesis for arthroplasty has many advantages compared with traditional methods. It is valuable in clinical practice as a new method for treatment of TMJ ankylosis.
Liang
Cheng
C
School of Stomatology, Peking University, Beijing 100081  China.
Wang
Xing
X
Yi
Biao
B
Li
Zili
Z
Wang
Xiaoxia
X
Chen
Bo
B
D000293:Adolescent; D000328:Adult; D000844:Ankylosis / Q000601:surgery*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010012:Osteogenesis; D013704:Temporomandibular Joint / Q000601:surgery*; D013705:Temporomandibular Joint Disorders / Q000601:surgery*