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:: Volume 22, Issue 4 (Winter 2005) ::
J Dent Sch GYEAR__, 22(4): 581-589 Back to browse issues page
Gonial angle changes following mandibular set back using bilateral sagittal split ramus osteotomy (BSSRO)
Mohammad Jafarian Corresponding Author: Dr. *1, Ali Asghar Roohi Dr.
Abstract:   (6323 Views)

Purpose: To assess the gonial angle changes using BSSRO tecnique for mandibular set back.

Methods & Materials: Lateral cephalograms of 30 patients, 11 male &19 female ranging from 18 to 38 years old who under went BSSRO to treat mandibular prognathism were traced. They were compared before operation, during intermaxillary fixation (IMF) and three months after operation by T – test. The fixation technique was wire osteosynthesis (superior border) - in 24 cases and position screw rigid fixation (2 screws) in 6 cases.

Results: Mandibular gonial angle decreased in all patients with a mean of 70 (SD=4.2). This reduction was 10.30 (SD=5.3) in rigid fixation group and 5.20 (SD=3.5) in nonrigid group. In severe set backs (more than 10 mm) the mean of reduction of gonial angle was 5.40 (SD=3.8). Conclusion: In set back osteotomies using BSSRO technique there is a decrease in gonial angle but no significant relation exists between the amount of set back and gonial angle changes.

J Dent Sch 2005 22(4): 581

Keywords: Mandible, Gonial Angle, Sagittal Split Osteotomy, Set Back
Full-Text [PDF 241 kb]   (1139 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2006/09/6
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Jafarian M, Roohi A A. Gonial angle changes following mandibular set back using bilateral sagittal split ramus osteotomy (BSSRO) . J Dent Sch. 2005; 22 (4) :581-589
URL: http://jds.sbmu.ac.ir/article-1-381-en.html

Volume 22, Issue 4 (Winter 2005) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی Shahid Beheshti University Dental Journal
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