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Evaluation of Relapse according to Set-back Degree of the Mandible at Bilateral Sagittal Split Ramus Osteotomy in Mandibular Prognathism Patients  

Yoo, Kyung-Hwan (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Kim, Su-Gwan (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Moon, Seong-Yong (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Oh, Ji-Su (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Kim, Saeng-Gon (Department of Human Biology, School of Dentistry, Chosun University)
Park, Jin-Ju (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Jung, Jong-Won (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Yoon, Dae-Woong (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Yang, Seong-Su (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Publication Information
Maxillofacial Plastic and Reconstructive Surgery / v.33, no.4, 2011 , pp. 319-322 More about this Journal
Abstract
Purpose: The purpose of this study was to examine the appropriate degree of set-back of the mandible by evaluating the rate of relapse after surgery. Methods: Among the patients who visited our hospital from January 2002 to January 2007 and who underwent orthognathic surgery, of the patients available for follow-up observation, the rate of relapse after surgery was investigated according to the set-back degree. The patients were divided into groups by the degree of set-back, and relapse was evaluated by the radiographs performed the day after surgery, 6 months after surgery, 1 year after surgery, 2 years after surgery and 3 years after surgery. Results: In cases that exceeded the limit of posterior movement of the mandible (13 mm) or that had the wrong position of the condyle, a greater tendency toward relapse was shown. Conclusion: Based on the results of this study, among the cases that required a large amount of posterior movement of the mandible, two jaw surgeries accompanied by bilateral sagittal split ramus osteotomy (BSSRO) and LeFort I osteotomy are recommended.
Keywords
Complication; Orthognathic surgery; Sagittal split ramus osteotomy;
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