Sagittal Split Ramus Osteotomy in the Shortest Buccal Bone Marrow Distances of the Mandible on the Coronal Plane.

Autor: Chen CM; School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.; Department of Oral and Maxillofacial Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan., Hsu HJ; Department of Oral and Maxillofacial Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan., Chen PH; School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan., Liang SW; School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan., Lin IL; Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan., Hsu KJ; School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.; Department of Dentistry, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung, Taiwan.
Jazyk: angličtina
Zdroj: BioMed research international [Biomed Res Int] 2021 Mar 18; Vol. 2021, pp. 5586498. Date of Electronic Publication: 2021 Mar 18 (Print Publication: 2021).
DOI: 10.1155/2021/5586498
Abstrakt: Purpose: This study investigated the relationship between the shortest buccal bone marrow of the ramus and skeletal patterns.
Materials and Methods: Using cone-beam computed tomography data (specifically, the A point-nasion-B point (ANB) angle), we divided patients into three groups as follows: skeletal class I (0° < ANB < 4°), class II (ANB: ≥4°), and class III (ANB: ≤0°). Sixteen vertical sections in the coronal plane were taken starting from slice 0 (original intact mandibular canal) anteriorly at 2 mm intervals to slice 15 (30 mm). The thickness of the mandible (M) and shortest buccal bone marrow (SBM) were measured. The data of SBM were divided into two groups (SBM ≥ 1 mm and SBM < 1 mm). For each skeletal pattern, an SBM value < 1 mm was considered to indicate a high possibility of postoperative nerve paresthesia and bad split.
Results: The three skeletal pattern groups also did not significantly differ in their M values for all sections. The mean SBM values of class III (0.91-2.11 mm) at 6-16 mm anterior to the mandibular foramen were significantly smaller than those of class II (1.53-3.17 mm). Comparing the occurrence ratio of SBM < 1 mm, the highest and lowest probabilities in class III (55% and 21.7%, respectively) were significantly larger at 6-20 mm anterior to the mandibular foramen than those in class II (28.3% and 5%, respectively).
Conclusion: Class III had a significantly shorter SBM distance and higher SBM occurrence probability than class II at the mandibular ramus region, implying that class III participants are more likely than class II participants to have nerve paresthesia and bad split after sagittal split ramus osteotomy.
Competing Interests: The authors declare that they have no conflicts of interest.
(Copyright © 2021 Chun-Ming Chen et al.)
Databáze: MEDLINE
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