光学感应式下颌运动轨迹描记所获参数准确性及可重复性的体外研究
In vitro study on the accuracy and reproducibility of parameters obtained by optical sensing mandibular movement tracing system
师晓蕊 1张吉昊 1刘峰1
作者信息
- 1. 北京大学口腔医学院·口腔医院门诊部 国家口腔医学中心 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 国家卫生健康委员会口腔医学计算机应用工程技术研究中心,北京 100081
- 折叠
摘要
目的 通过体外实验,测量并比较不同设定角度、不同操作路径下前伸髁导斜度及切导斜度的差别,评价光学感应式下颌运动轨迹描记的参数结果准确性及可重复性.方法 根据实际招募受试者口内光学扫描及上下颌牙列坐标数据文件,设计制作个性化测量模型及固定装置,3D打印加工并安装于全可调咬合架上.调节咬合架双侧前伸髁导斜度及前伸切导斜度,设10°至60°梯度变化共12组,使用咬合架设定参数模块完成下颌运动轨迹描记,并读取测量参数进行统计学分析.结果 除前伸髁导斜度40°与60°组及前伸切导斜度10°组外,其余各组测量值与设定值均存在统计学差异,标准差范围0.300°～2.994°;不同铰链轴测定的操作路径所获得前伸髁导斜度数值不存在统计学差异.结论 光学感应式下颌运动轨迹描记所获得的参数准确性及可重复性可满足临床应用需求,但其测量值仍与设定值存在一定差异.在保证测试装置稳定的前提下,针对同一对象进行多次不同测试时,是否进行重复轴定位对于测量结果不存在明显影响.
Abstract
Objective To measure and compare differences in sagittal condylar inclination(SCI)and sagittal frontal table inclination(SFTI)under different setting values and operating paths through in vitro experiments.Evaluate the accuracy and reproducibility of parameter results obtained by optical sensing mandibular movement tracing system.Methods Based on the actual intraoral scan data and dentition coordinate data files from recruited subjects,personalized measurement models and fixtures were designed and 3D-printed,then installed on the fully adjustable articulator.Bilateral SCI and SFTI were set with gradient changes from 10° to 60°,resulting in a total of 12 groups.The articulator module was used to complete the tracing of the mandibular movement and get the measurement parameters,followed by statistical analysis.Results Except for the 40° and 60° SCI groups and the 10° SFTI group,statistical differences were observed between the measured values and the set values,with standard deviation ranging from 0.300° to 2.994°.There was no statistical difference in SCI values obtained at different acquirement timings of hinge axis during operation.Conclusion The accuracy and reproducibility of parameters obtained by optical sensing mandibular movement tracing system can meet the needs of clinical applications,but there are still certain differences between the measured values and the setting values.Ensuring the stability of the test device,multiple tests on the same object,whether repeated hinge axis positioning is performed or not,has no significant impact on the results.
关键词
下颌运动轨迹描记/可重复性/咬合架参数设定Key words
Mandibular movement tracing/Reproducibility/Articulator parameter setting引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据