华西口腔医学杂志2025，Vol.43Issue(6)：771-779,9.DOI:10.7518/hxkq.2025.2025077
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 im-plant restoration in edentulous jaws
摘要
Abstract
Objective To 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.Methods With the use of an in vitro edentulous 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 in-formation 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.Results The extraoral scanning system demonstrated superior true-ness 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 sys-tem exhibited increased three-dimensional morphological and linear deviations(P<0.001)but maintained a stable angu-lar 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).Conclusion The 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.关键词
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分类
医药卫生引用本文复制引用
杨咏涛,李欣,商相宜,单珅瑶,李文博,秦庆钊,王勇,赵一姣..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[J].华西口腔医学杂志,2025,43(6):771-779,9.基金项目
北京市自然科学基金(L232100,L242132) （L232100,L242132）
国家自然科学基金(82271039,82071171) （82271039,82071171）
国家重点研发计划(2022YFC-2405401) Beijing Natural Science Foundation(L23-2100,L242132) （2022YFC-2405401）
the National Natural Science Founda-tion of China(82271039,82071171) （82271039,82071171）
National Key Re-search and Development Program of China(2022YFC24-05401) （2022YFC24-05401）
