Three-dimensional evaluation of skeletal and dental changes in patients with skeletal class III malocclusion and facial asymmetry after surgical-orthodontic treatment
| Autor: | Yuyue Li, Huayu Ye, Leilei Zheng, Jiangtao Zhang, Yun Hu, Hao Tan, Wenjie Xu, Ye Ming, Tao Wang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Oral Surgical Procedures Orthodontics Mandible Mandibular first molar Condyle 030218 nuclear medicine & medical imaging 03 medical and health sciences Young Adult 0302 clinical medicine Imaging Three-Dimensional stomatognathic system medicine Maxillary first molar Maxilla Humans Radiology Nuclear Medicine and imaging In patient Decompensation Electrical and Electronic Engineering Instrumentation Dental alveolus Radiation business.industry Cone-Beam Computed Tomography Condensed Matter Physics medicine.disease stomatognathic diseases Malocclusion Angle Class III Treatment Outcome Facial Asymmetry 030220 oncology & carcinogenesis Female Malocclusion business Tooth Facial symmetry |
| Zdroj: | Journal of X-ray science and technology. 28(4) |
| ISSN: | 1095-9114 |
| Popis: | To evaluate skeletal and dental changes in patients with skeletal Class III malocclusion and facial asymmetry after surgical-orthodontic treatment using cone-beam computerized tomography (CBCT).This study included forty adult patients diagnosed with skeletal Class III malocclusion and asymmetry who underwent either isolated mandibular surgery or bimaxillary surgery. CBCT scans were taken before treatment (T0), at the completion of presurgical orthodontic treatment (T1) and after treatment (T2). Mimics 17.0 and 3-Matics 7.0 were used to measure skeletal and dental parameters. Skeletal and dental changes within each group from pretreatment to posttreatment were assessed, and Pearson correlation analysis was used to analyze the correlations among skeletal changes.The three-dimensional changes in condylar position were insignificant after surgical-orthodontic treatment in either group (P 0.05). However, in the one-jaw surgery group, there were significant backward rotations of the condyle and ramus on the nondeviated side (P 0.05), and the condyle on the deviated side rotated inward and forward significantly in the two-jaw surgery group (P 0.05) at T2. There were no significant differences in the changes in the total alveolar bone thickness of bilateral first molars during dental decompensation (P 0.05). The ratio between the buccal and the total bone thickness around the maxillary first molar on the deviated side decreased significantly at T1, as did those around the mandibular first molar on the nondeviated side (P 0.05).Condylar angulations were less stable after treatment (7 to 9 months after surgery) in both the one-jaw and the two-jaw surgery groups, while condylar displacements were insignificant. In addition, orthodontists should keep a watchful eye to the relative position of the root in the alveolar bone during tooth decompensation. |
| Databáze: | OpenAIRE |
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