Author:
Zhang Shizhen,Wei Xiaoyu,Wang Lufei,Wu Zhouqiang,Liu Lu,Yan Xinyu,Lai Wenli,Long Hu
Abstract
This study aims to evaluate the overall bone thickness (OBT) and cortical bone thickness (CBT) of mandibular symphysis and to determine the optimal sites for the insertion of orthodontic mini implants. Cone-beam computed tomography (CBCT) images of 32 patients were included in this study. The sample was further categorized into three facial types: low-, average-, and high-angle. OBT and CBT were measured at the mandibular symphysis region. All measurements were performed at six different heights from the cementoenamel junction [CEJ] and at seven different angles to the occlusal plane. Analysis of variance (ANOVA) was used for statistical comparison and a p value less than 0.05 was considered statistically significant. Our results revealed that neither OBT nor CBT was influenced by age or sex, except for the observation that CBT was significantly greater in adults than in adolescents. OBT and CBT were significantly greater in low-angle cases than in average- and high-angle cases. Both OBT and CBT were significantly influenced by insertion locations, heights and angles, and their interactions. CBT and OBT were greatest at the location between two lower central incisors, and became greater with increases in insertion height and angle. Both recommended and optimal insertion sites were mapped. The mandibular symphysis region was suitable for the placement of orthodontic mini implants. The optimal insertion site was 6–10 mm apical to the CEJ between two lower central incisors, with an insertion angle being 0–60 degrees to the occlusal plane.
Funder
National Natural Science Foundation of China
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Mandibular Labial Region;Clinical Insertion Techniques of Orthodontic Temporary Anchorage Devices;2023-12-18
2. Requirements for the Insertion of Orthodontic Temporary Anchorage Devices;Clinical Insertion Techniques of Orthodontic Temporary Anchorage Devices;2023-12-18
3. Root Contact;Clinical Insertion Techniques of Orthodontic Temporary Anchorage Devices;2023-12-18
4. Infra zygomatic crest (IZC) and mandibular buccal shelf (MBS) bone screws: A comprehensive updated review;Journal of Dental Specialities;2023-09-15