Stability of unilateral sagittal split ramus osteotomy for correction of facial asymmetry: long-term case series and literature review
이성근, 강영훈, 김욱규, 김종렬, 박봉욱,
소속 상세정보
이성근 ( Lee Seong-Geun ) - Ilsan Ye Dental Clinic
강영훈 ( Kang Young-Hoon ) - Gyeongsang National University School of Medicine Department of Oral and Maxillofacial Surgery
김욱규 ( Kim Uk-Kyu ) - Pusan National University School of Dentistry Department of Oral and Maxillofacial Surgery
김종렬 ( Kim Jong-Ryoul ) - On General Hospital Jaw and Face Surgery Center Department of Oral and Maxillofacial Surgery
박봉욱 ( Park Bong-Wook ) - Gyeongsang National University School of Medicine Department of Oral and Maxillofacial Surgery
KMID : 0355620150410030156
Abstract
Bilateral sagittal split ramus osteotomy is considered a standard technique in mandibular orthognathic surgeries to reduce unexpected bilateral stress in the temporomandibular joints. Unilateral sagittal split ramus osteotomy (USSO) was recently introduced to correct facial asymmetry caused by asymmetric mandibular prognathism and has shown favorable outcomes. If unilateral surgery could guarantee long-term postoperative stability as well as favorable results, operation time and the incidence of postoperative complications could be reduced compared to those in bilateral surgery. This report highlights three consecutive cases with long-term follow-up in which USSO was used to correct asymmetric mandibular prognathism. Long-term postoperative changes in the condylar contour and ramus and condylar head length were analyzed using routine radiography and computed tomography. In addition, prior USSO studies were reviewed to outline clear criteria for applying this technique. In conclusion, patients showing functional-type asymmetry with predicted unilateral mandibular movement of less than 7 mm can be considered suitable candidates for USSO-based correction of asymmetric mandibular prognathism with or without maxillary arch surgeries.
키워드
Unilateral sagittal split ramus osteotomy; Functional facial asymmetry; Laterognathism; Temporomandibular joint
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