不同矢状骨面型成年患者磨牙后三角及下颌升支前缘骨骼特征的CBCT分析

Abstract

Abstract: Objective The aim of this study was to evaluate bone characteristics of the mandibular retromolar trigone and anterior ramus region to evaluate the risks for miniscrew insertion in in adult with different sagittal skeletal patterns. Methods The sample consisted of 150 adult patients with different sagittal skeletal patterns who visited Affiliated Stomatological Hospital of Nanjing Medical University from 2016 to 2020. On sagittal scan views, bone depth and cortical bone thickness were evaluated on specific lines parallel and at a 45° angle to the occlusal plane, and at 2 mm and at 4 mm distance from it. Results All of the considered insertion sites showed on average more than 10 mm of bone depth. Cortical bone thickness showed average values from 1.7 mm to 2.4 mm. Inferential statistics showed significantly (P <0.05) greater bone depth and cortical bone thickness in cross-sectional scans parallel to the occlusal plane compared with those at a 45° angle to it. The Class Ⅱ patients have the smallest bone depth while the Class Ⅰ have the biggest(p<0.05). Conclusion The retromolar trigone and anterior ramus region showed enough bone depth and cortical bone thickness for safe miniscrew insertion in adult with different sagittal skeletal patterns

Key words: sagittal skeletal patterns, miniscrew, bone characteristics, CBCT

CLC Number:

R783.5

Jun-Jie YE. CBCT analysis of bone characteristics of mandibular retromolar trigone and anterior ramus region in adult with different sagittal skeletal patterns[J]. , 2021, 41(6): 509-513.

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CBCT analysis of bone characteristics of mandibular retromolar trigone and anterior ramus region in adult with different sagittal skeletal patterns

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