Augmented corticotomy-assisted presurgical orthodontics of class III malocclusions: a cephalometric and cone-beam computed tomography study.
OBJECTIVE
The purpose of this study was to evaluate mandibular incisor decompensation and the surrounding periodontal status with augmented corticotomy-assisted presurgical orthodontics of class III patients.


METHODS
Fifty-six surgical class III patients were enrolled in this study, 26 of whom chose augmented corticotomy-assisted presurgical orthodontics (G1), and 30 chose conventional procedures (G2). Cone-beam computed tomography images and lateral cephalograms were obtained from each patient before and after presurgical orthodontics. Measurements of variables were compared using Student t tests and separate variance estimation t tests.


RESULTS
The amount of mandibular incisor decompensation and the increase in labial alveolar bone thickness in G1 were greater than those in G2 during presurgical orthodontics (P < 0.001), however, root resorption (P < 0.001), the decrease in lingual alveolar bone thickness (P < 0.001), and vertical alveolar bone loss on both labial (P < 0.05) and lingual sides (P < 0.001) were less in G1 than in G2.


CONCLUSIONS
Sufficient mandibular incisor decompensation and better periodontal preservation were achieved with augmented corticotomy-assisted presurgical orthodontics for class III patients compared with traditional procedures.
From the *Center of Cranio-facial Orthodontics and †Department of Oral and Maxillofacial Surgery, College of Stomatology Affiliated 9th People's Hospital, Shanghai Jiao Tong University, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China.
Bo
B
Wang
Guofang
G
Shen
Bing
B
Fang
Hongbo
H
Yu
Yong
Y
Wu
D000293:Adolescent; D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000601:surgery; D000539:Alveolar Process / Q000000981:diagnostic imaging / Q000601:surgery*; D016025:Bone Transplantation / Q000379:methods*; D002508:Cephalometry; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D007180:Incisor / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D008313:Malocclusion, Angle Class III / Q000601:surgery*; D063168:Mandibular Osteotomy / Q000379:methods*; D009971:Orthodontics, Corrective; D011300:Preoperative Care / Q000379:methods*; D014087:Tooth Movement Techniques