目的:皮质骨厚度限制了牙齿的位置,因此可能是正畸牙齿移动的限制因素。该研究旨在将上颌骨和下颌骨的皮质骨厚度与不同面部类型的皮质骨厚度相关联,viz;dolichoface,近距离面部,和中面。
方法:分析了40次CT扫描的面部类型,并将其分为面部(13),近面(13)和中面(14)面部类型。扫描测量中切牙的右侧和左侧颊和舌侧皮质骨厚度,上颌骨和下颌骨上的第一和第二磨牙区。其他参数,如基底皮质骨厚度,高度,还测量了皮质骨的宽度。为了确定不同参数之间的相关性和差异,对获得的数据进行相关系数,t测试,和方差分析统计分析。
结果:发现中切牙的上颌颊皮质骨厚度与面部指数高度相关,相关系数为-0.833**。下颌颊骨厚度与面型和中切牙皮质骨厚度相关,首先,和第二磨牙由-0.531**,-0.474**,和-0.589**,分别。右侧和左侧皮质骨厚度之间存在显著差异(p<0.05),并且对于不同面部类型之间的所有参数也存在显著差异(p<0.05)。
结论:面部类型与皮质骨形态的某些解剖学测量之间存在一定的相关性。面部类型显示薄的颊皮质骨,这意味着这些类型的个体正畸牙齿移动的局限性。
OBJECTIVE: cortical bone thickness confines the position of teeth and thus can be a limiting factor for orthodontic tooth movement. The study is aimed to correlate the cortical bone thickness of the maxilla and mandible with that of different face types, viz; dolichofacial, brachyfacial, and mesofacial.
METHODS: Forty CT scans were analysed for the face types and were grouped into dolichofacial (13), brachyfacial (13) and mesofacial (14) face types. The scans were measured for the right and left side buccal and lingual cortical bone thickness at the central incisor, first and second molar regions on both the maxilla and mandible. Other parameters like basal cortical bone thickness, height, and width of cortical bone were also measured. To determine the correlation and difference between the different parameters, the obtained data was subjected to the correlation coefficient, t test, and ANOVA statistical analysis.
RESULTS: Maxillary buccal cortical bone thickness of central incisors was found to be highly correlated to facial index with a correlation coefficient of - 0.833 * *. Mandibular buccal bone thickness correlated with face type and cortical bone thickness at the central incisor, first, and second molars by-0.531 * *, - 0.474 * *, and - 0.589 * *, respectively. There was a significant difference between the right and left side cortical bone thickness (p < 0.05) and also for all the parameters amongst the different face types (p < 0.05).
CONCLUSIONS: There exists a definite correlation between the face type and the certain anatomical measurements of cortical bone morphology. Dolichofacial face types show thin buccal cortical bone, which implies the limitation of orthodontic tooth movement in these types of individuals.