[Distraction osteogenesis for correction of maxillary constriction].
OBJECTIVE
To study the methods and effects of distraction osteogenesis for correction of maxillary constriction.


METHODS
10 cases (5 males, and 5 females, aged 16-33 years, average 19.6) were treated by distraction osteogenesis for correction of maxillary constriction. Le Fort I osteotomy and palatal suture osteotomy for the upper jaw were made before opening of the Hyrax screw expander. Totally four times of opening the screw a day were performed. 2 cases were expanded unilaterally. The AP head films were analyzed using Image and Database Analysis System (IDAS) before and after expansion.


RESULTS
1. Expansion of upper arch was achieved done within a few days, and the maxilla, maxillary dental base and the posterior teeth were expanded as much as 3.84 mm, 3.25 mm, and 5.61 mm respectively. 2. The new bone was formed between the opened suture in two weeks, and filled the suture in 2 to 3 months. 3. Maxillary teeth tipped bucally a little bit.


CONCLUSIONS
Distraction osteogenesis rapid maxillary expansion could get a good result following Le Fort I and palatal suture osteotomy for correction of maxillary constriction.
Zhou
Y
Y
Department of Orthodontics, School of Stomatology, Beijing Medical University, Beijing 100081, China.
Wang
X
X
Lin
Y
Y
D000293:Adolescent; D000328:Adult; D003724:Dental Arch / Q000002:abnormalities / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000002:abnormalities / Q000601:surgery*; D019857:Osteogenesis, Distraction / Q000379:methods*; D019340:Osteotomy, Le Fort; D010155:Palatal Expansion Technique; D016896:Treatment Outcome