Tsuboi Akihiro, Koizumi So, Takahashi Masahiro, Hikita Yu, Yamaguchi Tetsutaro
Department of Orthodontics, School of Dentistry, Kanagawa Dental University, Yokosuka 238-8580, Japan.
Dent J (Basel). 2024 Dec 24;13(1):3. doi: 10.3390/dj13010003.
This study aimed to explore the association between the ANB angle and mandibular bone thickness in individuals with skeletal malocclusion. We analyzed 224 adults, with a gender imbalance noted (68 men and 156 women), and an age range between 18.0 and 65.1 years. The thicknesses of the ramus (RT) and the body of the mandible (BT) were measured at 25 sites on each side (left and right) of the jaw, using CT images. The main focus was on the statistical associations between the ANB angle and the ratio (BT-RT)/volume of the mandible (V). Results revealed a significant negative association between (BT-RT)/V and the ANB angle ( < 0.001), while a positive association was found for RT/V ( < 0.001). No significant association emerged for BT/V. The findings indicated that with increased mandibular protrusion, the ramus thickness decreased, whereas the body thickness remained unchanged. The differing relationships in mandibular thickness underscore the significance of CT imaging in predicting craniofacial growth patterns, particularly in observing discrepancies between the mandibular body and ramus as they relate to the anterior-posterior jaw relationship.
本研究旨在探讨骨骼性错牙合个体中ANB角与下颌骨厚度之间的关联。我们分析了224名成年人，注意到存在性别失衡（68名男性和156名女性），年龄范围在18.0至65.1岁之间。使用CT图像在颌骨每侧（左侧和右侧）的25个部位测量下颌升支（RT）和下颌体（BT）的厚度。主要关注ANB角与下颌骨（V）的（BT - RT）/体积比值之间的统计关联。结果显示（BT - RT）/V与ANB角之间存在显著负相关（<0.001），而RT/V呈正相关（<0.001）。BT/V未出现显著关联。研究结果表明，随着下颌前突增加，升支厚度减小，而下颌体厚度保持不变。下颌厚度的不同关系凸显了CT成像在预测颅面生长模式中的重要性，特别是在观察下颌体与升支之间与前后颌关系相关的差异方面。
