基于气动排龈口内数字化印模新技术的后牙单冠修复治疗1例  

New intraoral digital impression with pneumatic gingival retraction used in the restoration of crown for posterior teeth:a case report

作　　者：徐昕恺 张美子 刘中宁[1] 孙玉春[1] 陈虎[1] 李伟伟[1] 赵晓一[2] 贾勇杰 肖淑娟 马超 陈晓军 江腾飞 赵晓波 田素坤 Xu Xinkai;Zhang Meizi;Liu Zhongning;Sun Yuchun;Chen Hu;Li Weiwei;Zhao Xiaoyi;Jia Yongjie;Xiao Shujuan;Ma Chao;Chen Xiaojun;Jiang Tengfei;Zhao Xiaobo;Tian Sukun(Center of Digital Dentistry,Faculty of Prosthodontics,Peking University School and Hospital of Stomatology&National Center for Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Research Center of Oral Biomaterials and Digital Medical Devices&Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health&Beijing Key Laboratory of Digital Stomatology,Beijing 100081,China;Department of General Dentistry,Peking University School and Hospital of Stomatology&National Center for Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Research Center of Oral Biomaterials and Digital Medical Devices&Beijing Key Laboratory of Digital Stomatology,Beijing 100081,China;Shining 3D,Hangzhou 311258,China)

机构地区：[1]北京大学口腔医学院·口腔医院口腔医学数字化研究中心、口腔修复教研室、国家口腔医学中心、国家口腔疾病临床医学研究中心口腔生物材料和数字诊疗装备国家工程研究中心、国家卫生健康委口腔医学计算机应用工程技术研究中心、口腔数字医学北京市重点实验室,北京100081 [2]北京大学口腔医学院·口腔医院综合治疗科、国家口腔医学中心、国家口腔疾病临床医学研究中心、口腔生物材料和数字诊疗装备国家工程研究中心、口腔数字医学北京市重点实验室,北京100081 [3]先临三维科技股份有限公司,杭州311258

出　　处：《中华口腔医学杂志》2024年第10期1044-1048,共5页Chinese Journal of Stomatology

基　　金：国家重点研发计划(2023YFB4605400);国家自然科学基金(52105265);北京市自然科学基金-海淀原始创新联合基金(L232145);北京大学口腔医院临床新技术新疗法项目(PKUSSNCT-23B04)。

摘　　要：固定修复中预备体边缘的清晰暴露是精准获取数字化印模和提高修复体边缘密合性的前提。为解决排龈线法存在的疼痛、急性损伤、操作时间长等不足,本课题组自主研发一种气动排龈口内数字化印模技术,采用新型扫描头喷射的高速气流瞬时排开游离龈,局部暴露龈下预备体边缘,结合基于法向距离判别的极点拼接算法和高速激光扫描摄影技术,完成全局预备体边缘数据及牙龈重建,实现无痛、无创、高效的预备体边缘位置精准获取。本文采用此技术对1例后牙全瓷冠修复患者进行治疗,获取的数字化印模中预备体边缘清晰,以此数据制作的牙冠边缘密合性好。In fixed prosthodontics,clear exposure of the preparation margin is the prerequisite for obtaining accurate digital impressions and improving the marginal fit of restorations.To resolve the issues associated with the cord retraction technique,such as pain,acute injury,and prolonged procedural time,this study proposes a new technology for intraoral digital impression taking with pneumatic gingival retraction.The new scanning head blows a high-speed airflow that instantaneously separates the free gingiva,locally exposing the subgingival preparation margin.Combined with the farthest point preservation stitching algorithm based on the distance from the normal vector and high-speed laser scanning photography,it achieves global preparation edge data and gingival reconstruction,realizing painless,non-invasive,and efficient precise acquisition of the preparation margin.Using this new technique,a patient with a full porcelain crown restoration on a posterior tooth was treated.The digital impression revealed a clear margin of the preparation,and the crown made from this data has a good marginal fit.

关 键 词：牙科印模技术 计算机辅助设计 排龈 口内扫描 气动排龈 口内数字化印模 

分 类 号：R783.3[医药卫生—口腔医学]