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http://dx.doi.org/10.4041/kjod.2010.40.6.383

Soft tissue changes associated with ASO/BSSRO and Le Fort I/BSSRO in skeletal Class III malocclusion with upper lip protrusion  

Kang, Ju-Man (Department of Orthodontics, Graduate School of Clinical Dental Science, The Catholic University of Korea)
Kim, Yoon-Ji (Department of Orthodontics, Graduate School of Clinical Dental Science, The Catholic University of Korea)
Park, Je-Uk (Department of Maxillofacial Surgery, Graduate School of Clinical Dental Science, The Catholic University of Korea)
Kook, Yoon-Ah (Department of Orthodontics, Graduate School of Clinical Dental Science, The Catholic University of Korea)
Publication Information
The korean journal of orthodontics / v.40, no.6, 2010 , pp. 383-397 More about this Journal
Abstract
Objective: The objective of this study was to compare maxillary soft tissue changes and their relative ratios to hard tissue changes after anterior segmental osteotomy (ASO)/bilateral sagittal split ramus osteotomy (BSSRO) and Le Fort I/BSSRO in skeletal Class III malocclusion with upper lip protrusion. Methods: The study sample comprised the ASO/BSSRO group (n = 14) and the Le Fort I/BSSRO group (n = 15). The Le Fort I/BSSRO group included cases of maxillary posterior impaction only. Lateral cephalograms were taken 2 months before and 6 months after surgery. Linear and angular measurements were performed. Results: The anterior maxilla moved backward in both groups after surgery, however the amount of change was significantly larger in the ASO/BSSRO group (p < 0.01). The ratios of hard to soft tissue change were 79% (SLS to A point), 80% (LS to A point) in the ASO/BSSRO group, and 15% (SLS to A point), 68% (LS to A point) in the Le fort I/BSSRO group. In addition, there was a $3.23^{\circ}$ increase of the occlusal plane in the Le Fort I/BSSRO group. Conclusions: When two-jaw surgery is indicated in skeletal Class III patients with protrusive lips, ASO may be a treatment of choice for cases with more severe upper lip protrusion, while Le Fort I with posterior impaction may be considered if an increase of occlusal plane angle is required.
Keywords
Two-jaw surgery; Soft tissue change; Le Fort I osteotomy; Anterior segmental osteotomy;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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