title: Skeletal stability of surgery-first bimaxillary orthognathic surgery for skeletal class III malocclusion, using standardized criteria.
abstract: The purpose of this study was to compare the postoperative stability following bimaxillary surgery performed either with or without preoperative orthodontic treatment, in class III malocclusion patients. These patients were enrolled using standardized inclusion criteria. Forty patients with a class III malocclusion were included in this retrospective study. Inclusion criteria were class III malocclusion with and without premolar extraction, <3mm midline deviation, and <5mm arch width discordance. Patients were assigned to the conventional bimaxillary surgery group (n=20) or the surgery-first bimaxillary surgery group (n=20). Serial cephalometric radiographs obtained before surgery (T0), at 2 months after surgery (T1), and at 6 months after surgery (T2) were used to assess the variation in surgical change (T0 to T1) and postsurgical change (T1 to T2). Eight linear and three angular parameters were used to evaluate postoperative stability. With respect to postsurgical changes, significant differences were observed in the changes for the vertical reference plane to the posterior nasal spine, horizontal reference plane to B-point, and occlusal plane angle in both groups. No statistically significant differences in the relapse rates were observed between the two groups. No significant differences were observed between the two groups in terms of the postoperative stability.
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, South Korea.
authors.forename: K-H
authors.initials: KH
authors.lastname: Park
authors.affiliation: Regea Institute for Regenerative Medicine, University of Tampere, Tampere, Finland; Department of Oral and Maxillofacial Surgery, University of Oulu, Oulu, Finland.
authors.forename: G K
authors.initials: GK
authors.lastname: Sandor
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, South Korea; Institute of Translational Dental Sciences and Dental Research Institute, Pusan National University, Yangsan, South Korea. Electronic address: ydkimdds@pusan.ac.kr.
authors.forename: Y-D
authors.initials: YD
authors.lastname: Kim
mesh_terms: D000328:Adult; D002508:Cephalometry; D005260:Female; D006801:Humans; D008297:Male; D008313:Malocclusion, Angle Class III / Q000601:surgery*; D008437:Maxilla / Q000601:surgery*; D009971:Orthodontics, Corrective; D056948:Orthognathic Surgical Procedures / Q000379:methods*; D012008:Recurrence; D012189:Retrospective Studies; D016896:Treatment Outcome
keywords: inclusion criteria; mandibular prognathism; preoperative orthodontic treatment; relapse