Three-dimensional Evaluation of Mandibular Stability during Intermaxillary Fixation after Bilateral Sagittal Split Ramus Osteotomy Surgery

doi:10.13701/j.cnki.kqyxyj.2021.10.015

Abstract

Abstract: Objective: To analyze the short-term relapse tendency of mandible after bilateral sagittal split ramus osteotomy (BSSRO) surgery with three-dimension measurement. Methods: CBCT images of forty-nine patients seeking for orthognathic surgery were collected in the study. The collection time was four days preoperatively (T0), four days postoperatively (T1), four to six weeks postoperatively (T2), and three months postoperatively (T3). A three-dimensional analytic method to measure mandible was set up with Pro Plan software. The study measured and analyzed the indicators and angles to describe the mandibular position and orientation. Results: For mandibular advancement patients, the measurements showed a significant difference in B and Pg in horizontal axis during short term (T1-T2). The mandibular plane tended to have a clockwise rotation. For mandibular setback patients, the measurements showed a significant difference in B in horizontal axis and Pg in horizontal and vertical axis. Conclusion: There was a three-dimensional relapse tendency of mandible in short-term after BSSRO,however, in the acceptable region.

Key words: bilateral sagittal split ramus osteotomy surgery, mandible, three-dimensional stability analysis

JIAO Xingqi, LI Yang, YI Biao. Three-dimensional Evaluation of Mandibular Stability during Intermaxillary Fixation after Bilateral Sagittal Split Ramus Osteotomy Surgery[J]. Journal of Oral Science Research, 2021, 37(10): 931-935.

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