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Stability of simultaneous maxillary and mandibular osteotomy for treatment of class III malocclusion: an analysis of three-dimensional cephalograms

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Author(s)
Tae-Geon KwonYoshihide MoriKatsuhiro MinamiSang-Han LeeMasayoshi Sakuda
Keimyung Author(s)
Kwon, Tae Geon
Department
Dept. of Dentistry (치과학)
Journal Title
Journal of Cranio-Maxillofacial Surgery
Issued Date
2000
Volume
28
Issue
5
Abstract
The current investigation was undertaken to study the three-dimensional (3-D) stability of simultaneous maxillary advancement and mandibular setback using rigid ®xation. The study also aimed to analyse the factors involved in postsurgical relapse by evaluation of changes in various parameters. Patients: Twenty-®ve cases were evaluated of simultaneous Le Fort I maxillary advancement and mandibular setback using rigid ®xation. Methods: Preoperative, immediate and 6-month postoperative skeletal and dental changes were analysed using 3-D cephalograms obtained from biplanar stereoradiography. Maxillary ®xation screws were used as landmarks to evaluate postoperative stability. Results: The mean maxillary advancement was 3.7 mm. Relapse in the sagittal, vertical, and transverse planes was not detectable in the maxilla ( p40.05). However, for an average mandibular setback of 5.7 mm, mean mandibular relapse was 1.1mm or 19.3% anteriorly ( p5 0.05). Surgical or postsurgical skeletal changes in the maxilla had no detectable in¯uence on mandibular relapse ( p4 0.05). Vertical
alterations of the facial skeleton achieved surgically predicted the mandibular relapse (R2=0.27, p5 0.05). Conclusion: Maxillary advancement and vertical changes of +2mm did not in¯uence the postoperative stability of the mandible. Relapse of the mandible seems to be in¯uenced mainly by the amount and direction of the surgical alteration of mandibular position.
Keimyung Author(s)(Kor)
권대근
Publisher
School of Medicine
Citation
Tae-Geon Kwon et al. (2000). Stability of simultaneous maxillary and mandibular osteotomy for treatment of class III malocclusion: an analysis of three-dimensional cephalograms. Journal of Cranio-Maxillofacial Surgery, 28(5), 272–277. doi: 10.1054/jcms.2000.0158
Type
Article
ISSN
1010-5182
Source
https://www.sciencedirect.com/science/article/pii/S1010518200901586?via%3Dihub
DOI
10.1054/jcms.2000.0158
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/33766
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Dentistry (치과학)
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