کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
3159623 | 1198348 | 2007 | 10 صفحه PDF | دانلود رایگان |
PurposeTo evaluate the transverse displacement of the proximal segment and its association with horizontal relapse post-treatment.MethodsRetrospective study of 25 patients (10 males, 15 females) who underwent bilateral sagittal split osteotomy (BSSO) advancement and Le Fort I osteotomy with rigid internal fixation (RIF) using bicortical lag screws. Posteroanterior and lateral cephalograms obtained preoperatively (T1), early postoperatively (T2), and after orthodontic treatment completion (T3) were used to assess: the angulation of each proximal segment relative to the upper orbital margin line and obtain the sum of both angles (total angle), mandibular intergonial width (IGW), mandibular length (Ar-B), B point position, and condylion position. Paired t tests were used to determine statistically significant (P < .05) changes within the variables between various time points (T2-T1; T3-T2; T3-T1). Correlations between variables were estimated by calculating Pearson’s correlation coefficients.ResultsT2-T1 findings: all 25 patients showed an increase in IGW with a mean of 6.5 ± 2.5 mm and the angulations of the proximal segments increased 3.2 ± 2.6° (total angle change). Ar-B increased 3.8 ± 3.4 mm. B point moved anteriorly 4.8 ± 2.9 mm. T3-T2 findings: IGW decreased 1.8 ± 1.5 mm; angulation of the right and left proximal segments decreased 1.2 ± 2.8° (total angle change). Condylion moved superiorly 1.5 ± 2.0.ConclusionsStatistically significant changes occurred in transverse width and angulation of proximal segments of patients who underwent BSSO advancement with Le Fort I osteotomy. No clinically significant associations were found between transverse displacement of the proximal segments and horizontal relapse.
Journal: Journal of Oral and Maxillofacial Surgery - Volume 65, Issue 1, January 2007, Pages 50–59