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Postoperative Positional and Dimensional Changes of Mandibular Canal after Bilateral Sagittal Split Set-Back
Duygu İşcan1, Melih Motro2, Ahu Acar3
1Private Practice, İstanbul, Turkey.
Turkish Journal of Orthodontics
|August 17, 2018
Summary
This study mapped the mandibular canal (MC) using CBCT scans to understand its position and changes after surgery. Findings aid surgeons in predicting MC location and reducing nerve damage risks.
Area of Science:
- Oral and Maxillofacial Surgery
- Radiology
- Anatomy
Background:
- Inferior alveolar neurosensory disturbance (IAND) is a risk in mandibular surgeries.
- Understanding mandibular canal (MC) position is crucial for surgical planning.
Purpose of the Study:
- To document preoperative MC position.
- To analyze 3D postoperative positional and length changes of the MC.
- To aid in reducing IAND by providing anatomical data.
Main Methods:
- Cone-beam computed tomography (CBCT) data were analyzed.
- SimPlant Pro software was used for MC examination.
- MC location was measured relative to mandibular bony borders.
Main Results:
- Preoperatively, the MC is typically in the middle third of the ramus and corpus.
- Postoperatively, ramus width increased, ramus length decreased, and MC shifted laterally and inferiorly.
- MC length decreased bilaterally, independent of setback amount.
Conclusions:
- Preoperative MC position data can assist surgeons in surgical planning.
- Postoperative MC changes provide a basis for future studies correlating changes with IAND.
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