Three-dimensional changes of proximal segments in facial asymmetry patients after bilateral vertical ramus osteotomy |
| |
| Affiliation: | 1. Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, South Korea;2. Private Practice, McLean, Virginia, USA;3. Department of Oral and Maxillofacial Surgery, Hankook General Hospital, Cheongju, South Korea;1. Resident, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China;2. Attending Doctor, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China;3. Attending Doctor, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China;4. Associate Professor, Department of Oral and Maxillofacial Surgery, Yinchuan Stomatology Hospital, Yinchuan, China;6. Professor, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China;1. Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea;2. Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea;1. Department of Oral and Maxillofacial Surgery, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands;2. Department of Oral and Maxillofacial Surgery, Radboud University Medical Center, Nijmegen, The Netherlands;1. Orthodontist and Assistant Professor, Orthodontics Department, Universidad del Valle, Cali, Colombia;2. Orthodontist, Universidad del Valle, Cali, Colombia;3. Nuclear Medicine Specialist and Head, Nuclear Medicine Department, Centro Médico Imbanaco, Cali, Colombia;4. Nuclear Medicine Specialist, Centro Médico Imbanaco, Cali, Colombia;6. Oral Maxillofacial Surgeon and Auxiliary Professor, Department of Orthodontics, Universidad del Valle; and Private Practice, Centro Médico Imbanaco, Cali, Colombia |
| |
| Abstract: | The intraoral vertical ramus osteotomy (IVRO) is a useful technique for mandibular setback surgery. However, there is a tendency for lateral flaring of the proximal segments on the non-deviation side after the correction of mandibular asymmetry with this technique. The purpose of this retrospective study was to evaluate the positional changes of the proximal segments after IVRO setback in skeletal class III patients with asymmetry, using preoperative and postoperative computed tomography scan data, and to apply the results in clinical practice. A total of 28 skeletal class III patients with asymmetry who underwent bimaxillary orthognathic surgery were included. A three-dimensional cone beam computed tomography scan was obtained preoperative, at 1 month postoperative, and at 1 year postoperative. At 1 month after the surgery, the proximal segments showed an outward rotation, lateral flaring, and anterior rotation of the condylar head. All postsurgical directional changes had returned to the preoperative state at 1 year postoperative, and there was no statistically significant difference in postoperative angulation changes between the two sides. The results showed no statistical differences in the positional changes of the proximal segments between the deviation and non-deviation sides. This study reaffirms the benefits of the IVRO for a minimal bony interference between the proximal and distal segments in three dimensions, including mandibular asymmetry cases. |
| |
| Keywords: | vertical ramus osteotomy (VRO) proximal segments mandibular asymmetry |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
