无牙颌种植修复数字化印模口外扫描与口内扫描的精度比较研究
Comparative study on the accuracy of extraoral scanning versus intraoral scanning in digital impressions for implant restoration in edentulous jaws
作者：杨咏涛, 李欣, 商相宜, 单珅瑶, 李文博, 秦庆钊, 王勇, 赵一姣
Author：Yang Yongtao, Li Xin, Shang Xiangyi, Shan Shenyao, Li Wenbo, Qin Qingzhao, Wang Yong, Zhao Yijiao
收稿日期：2025-02-28 年卷（期）页码：2025,43(6):771-771-779
期刊名称：华西口腔医学杂志
Journal Name：West China Journal of Stomatology
关键字：无牙颌种植,数字化印模,立体摄影测量,口内扫描,精度,
Key words：edentulous implant,digital impression,stereophotogrammetry,intraoral scan,accuracy,
基金项目：北京市自然科学基金(L232100);北京市自然科学基金(L242132);国家自然科学基金(82271039);国家自然科学基金(82071171);国家重点研发计划(2022YFC-2405401)
中文摘要
目的 评估自主研发的基于四目立体摄影测量技术的种植口外扫描系统在获取种植体三维位置信息方面的精准度，并与口内扫描系统进行对照研究。 方法 借助体外无牙颌种植模型，分别使用口外扫描系统和口内扫描系统获取含有种植体三维形态和位置信息的STL（Standard Tessellation Language）数据，作为实验组和对照组，使用牙颌模型扫描仪获取参考数据，在Geomagic Wrap 2021软件中分析实验组和对照组与参考数据的三维形态偏差、线性偏差和角度偏差，比较2组的正确度和精密度。 结果 口外扫描系统在三维形态偏差、线性偏差和角度偏差的正确度上均优于口内扫描系统，且差异具有统计学意义（P<0.001）。口外扫描系统在三维形态偏差上的精密度也高于口内扫描系统（P<0.001）。随着种植体数量的增加，口外扫描系统的三维形态偏差和线性偏差有所上升（P<0.001），但角度偏差变化差异无统计学意义，而口内扫描系统的三维形态偏差、线性偏差和角度偏差均有增加（P<0.05）。 结论 基于立体摄影测量技术的口外扫描系统在获取多单位种植体位置信息方面的精度优于口内扫描系统，为实现全流程无牙颌种植数字化修复提供了新的思路。
英文摘要
ObjectiveTo evaluate the accuracy of a self-developed extraoral scanning system based on four-camera stereophotogrammetric technology in the acquisition of three-dimensional positional information on dental implants and conduct a comparative study involving an intraoral scanning system.MethodsWith the use of anin vitroedentulous jaw model with implants, extraoral (experimental group) and intraoral (control group) scanning systems were employed to obtain STL (Standard Tessellation Language) datasets containing three-dimensional morphological and positional information on scan bodies. In addition, a dental model scanner was used to obtain reference data. The three-dimensional morphological, linear, and angular deviations between groups and reference data were analyzed using Geomagic Wrap 2021 software to compare trueness and precision.ResultsThe extraoral scanning system demonstrated superior trueness in three-dimensional morphological, linear, and angular deviations compared with the intraoral scanning system, with statistically significant differences (P<0 .001). the extraoral scanning system also showed a higher precision in three-dimensional morphological deviation (P<0 .001). as the number of implants increased, the extraoral scanning system exhibited increased three-dimensional morphological and linear deviations (P<0 .001) but maintained a stable angular deviation. the intraoral scanning system displayed significant increases in three-dimensional morphological, linear, and angular deviations with the increase in the number of implants (P<0 .05).ConclusionThe stereophotogrammetry-based extraoral scanning system outperforms intraoral scanning system in terms of the accuracy for multi-unit implant positioning and provides a novel approach for attaining a fully digital workflow for implant rehabilitation in edentulous jaws.
下一条：单纯锥度固位种植体早期失败的危险因素分析
【关闭】
