常用头影测量软件重叠技术的准确性研究

目的 分析常用头影测量软件重叠技术的准确性.方法 选取2010—2018年就诊于哈尔滨医科大学附属第一医院口腔正畸科的患者80例,分为青少年组与成年组,每组各40例.取每例样本矫治前后头颅侧位片,采用Bj?rk结构重叠法与常用头影测量软件重叠法进行上下颌重叠分析,计算两种重叠方法矫治前后分别得出的上下颌中切牙以及上下颌...

Study on the accuracy of superimposition technique of common cephalometric software

Abstract：　Objective　To analyze the accuracy of superimposition technique of common cephalometric software Methods　A total of 80 patients treated in the Department of Orthodontics in Harbin Medical University from 2010 to 2018 were selected and divided into adolescent group and adult group, each with 40 cases. Cephalograms were taken from each sample before and after treatment. The maxillary and mandibular superimposition was analyzed by Bj?rk structural superimposition method and cephalometric software superimposition method, and the vertical and horizontal displacement and axis rotation of the landmarks of the upper and lower central incisors and the upper and lower first molars were calculated before and after orthodontic treatment. Using SPSS23.0 software, Wilcoxon signed-rank test were used to calculate whether there were differences between the two superimposition methods. Results　There were significant differences between the two methods in the vertical displacement of the upper incisors and molars in the adolescent group (P<0.05), and there was no significant difference between the two methods in the mandibular superimposition(P>0.05). There was no significant difference in the measured values of the two methods in the adult group (P>0.05). Conclusion　The analysis of the superimposition method in the cephalometric software for adolescent patients may result in inaccurate tooth movement information, so it is recommended to use the accurate Bj?rk structural superimposition method. Adult patients can use cephalometric software superimposition technique.