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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ko, Ellen Wen-Ching Lin, Shao Cheng Chen, Yu Ray Huang, Chiung Shing |
| Description | Country affiliation: Taiwan Author Affiliation: Ko EW ( Graduate Institute of Craniofacial and Oral Science, Chang Gung University, Taoyuan, Taiwan.) |
| Abstract | PURPOSE: The objectives of the study were to identify the parameters related to skeletal stability after orthognathic surgery in skeletal Class III malocclusion using a surgery-first approach and to analyze the factors correlated with surgical relapse. MATERIALS AND METHODS: Forty-five consecutive patients were included. Serial cephalometric radiographs were traced and superimposed to investigate surgical stability at the initial examination, 1 week postoperatively, and after orthodontic debonding (12.22 mo after surgery). Patient grouping was based on the amount of horizontal relapse at the innermost point of the contour of the mandible between the incisor tooth and the bony chin, the B point (less stable group, n = 15; highly stable group, n = 18). Parameters, such as presurgical skeletal and dental variables, the amount of surgical setback, and total treatment duration, were compared between groups and analyzed for correlations with surgical stability. RESULTS: The mean setback at the innermost point of the contour of the mandible between the incisor tooth and the bony chin was 11.19 mm, and the mean relapse rate was 12.46%. The amount of surgical setback, overbite (positive values), overjet, depth of the curve of Spee, and lower anterior facial height showed statistically significant differences between groups. The amount of surgical setback, overbite (positive values), overjet, and depth of the curve of Spee showed statistically significant correlations with the amount of relapse. Skeletal relapse of the mandible increased significantly as the overbite increased. CONCLUSION: The factors for instability in the surgery-first approach include a larger overbite, a deeper curve of Spee, a greater negative overjet, and a greater mandibular setback. The initial overbite may be an indicator to predict possible skeletal relapse of mandibular setback. |
| File Format | HTM / HTML |
| ISSN | 02782391 |
| Issue Number | 5 |
| Volume Number | 71 |
| e-ISSN | 15315053 |
| Journal | Journal of Oral and Maxillofacial Surgery |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-05-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Medicine__semicolon__otorhinolaryngology__semicolon__surgery Malocclusion, Angle Class Iii Surgery Orthognathic Surgical Procedures Methods Adolescent Adult Cephalometry Chin Pathology Cohort Studies Female Follow-up Studies Humans Incisor Male Mandible Mandibular Osteotomy Maxilla Maxillary Osteotomy Osteotomy, Le Fort Osteotomy, Sagittal Split Ramus Overbite Recurrence Retrospective Studies Treatment Outcome Vertical Dimension Young Adult Comparative Study Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Oral Surgery Otorhinolaryngology Surgery |
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