Skeletal stability and condylar position related to fixation method following mandibular setback with bilateral sagittal split ramus osteotomy |
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| Affiliation: | 1. Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, South Korea;2. Department of Orthodontics, School of Dentistry, Pusan National University, Yangsan, South Korea;3. Department of Tissue Engineering, Regea Institute for Regenerative Medicine, University of Tampere, Tampere, Finland;4. Department of Oral and Maxillofacial Surgery, University of Oulu, Oulu, Finland;5. Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, South Korea;6. Dental Research Institute, and Institute of Translational Dental Sciences, Pusan National University, Yangsan, South Korea;1. Former Student, Division of Orthodontics, School of Medicine, Ewha Womans University, Seoul, Korea;2. Fellow, Division of Orthodontics, School of Medicine, Ewha Womans University, Seoul, Korea;3. Professor, Division of Orthodontics, School of Medicine, Ewha Womans University, Seoul, Korea;4. Department of Oral and Maxillofacial Surgery, New Face Surgery, Seoul, Korea;6. Associate Professor, Division of Oral and Maxillofacial Surgery, Department of Dentistry, School of Medicine, Ewha Womans University, Seoul, Korea;5. Assistant Professor, Division of Orthodontics, School of Medicine, Ewha Womans University, Seoul, Korea;1. Department of Oral and Maxillofacial Surgery, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea;2. Department of Orthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea;1. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Thamar University, Thamar, Yemen;2. Department of Oral and Maxillofacial Surgery, University of Texas Health Science Center, San Antonio, TX, USA;1. Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas Areião, Piracicaba, São Paulo, Brazil;2. Department of Surgery, Stomatology, Pathology and Radiology, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil;3. Department of Stomatology, Public Oral Health and Forensic Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, São Paulo, Brazil |
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| Abstract: | PurposeTo investigate postoperative intersegmental displacement and relapse following bilateral sagittal split ramus osteotomy (BSSRO) by comparing three different fixation methods: group A (sliding plate), group B (miniplate) and group C (bicortical screws).Materials and methodsThe present retrospective study included 55 patients with mandibular prognathism who were treated with BSSRO. To evaluate skeletal changes, cone-beam computed tomography was taken before surgery (T0), three days after surgery (T1), and 6 months after surgery (T2). Differences among the three groups were assessed using a one-way analysis of variance, where P < 0.05 was accepted as statistically significant.ResultsThere were no significant differences among the three groups in demographic data and the amount of mandibular setback. In skeletal changes and condylar axis changes, there were no statistically significant differences among the three groups. However, there were statistically significant postoperative skeletal changes in group C (bicortical screws) at all landmarks. The mean horizontal relapse rate was 1.9% in group A (sliding plate); 4.8% in group B (miniplate); and 15.4% in group C (bicortical screws).ConclusionThe sliding plate system has good adaptability to the proximal segment after mandibular setback with BSSRO, and behaves according to semi-rigid fixation principles. |
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| Keywords: | Mandibular prognathism Titanium Cone-beam computed tomography Orthognathic |
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