title: Medial cortex fracture patterns after sagittal split osteotomy using short versus long medial cuts: can we obviate bad splits?
abstract: The aim of the present study was to evaluate the lingual fracture patterns after sagittal split osteotomy (SSO) using short and long medial osteotomy cuts, via three-dimensional (3D) cone beam computed tomography (CBCT). Forty-six subjects participated in this prospective study. Two types of medial osteotomy line were made: for type I, the medial osteotomy line was finished just before the lingula; for type II, the medial osteotomy line was extended 3-4mm beyond the lingula. Three fracture patterns were observed after SSOs. There were no significant differences in the medial fracture patterns between the two medial osteotomy types (P=0.16). The buccolingual thickness of the ramus was lower in fractures with pattern 3 (bad split) than in the two other fracture patterns. The length of the medial osteotomy line - short or long - did not alter the prevalence of a bad split. The bone thickness of the ramus may affect the type of fracture pattern on the medial side of the ramus.
authors: Oral and Maxillofacial Surgery, Shiraz University of Medical Sciences, Shiraz, Iran.
authors: B
authors: B
authors: Zamiri
authors: Oral and Maxillofacial Surgery, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Electronic address: Tabmed@gmail.com.
authors: R
authors: R
authors: Tabrizi
authors: Oral and Maxillofacial Radiology, Shiraz University of Medical Sciences, Shiraz, Iran.
authors: S
authors: S
authors: Shahidi
authors: Oral and Maxillofacial Surgery, Yasuj University of Medical Sciences, Yasuj, Iran.
authors: A
authors: A
authors: Pouzesh
mesh_terms: D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging* / Q000601:surgery*; D059229:Osteotomy, Sagittal Split Ramus / Q000009:adverse effects / Q000379:methods*; D011446:Prospective Studies; D055815:Young Adult
keywords: CBCT; bad split; fracture; mandible; sagittal osteotomy