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Published on: September 8, 2023
Augmented corticotomy-assisted presurgical orthodontics of class III malocclusions: a cephalometric and cone-beam
Bo Wang1, Guofang Shen, Bing Fang
1From 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.
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.
