关键词: 计算机辅助设计与制造, 口内扫描仪, 3D打印技术

Abstract: Objective　To evaluate the clinical effects of anterior teeth restoration by digital impression technology combining 3D printing technology after root canal treatment. Methods　Totally 34 patients whose single anterior teeth needed crown restoration visited the Department of Prosthetic Dentistry from May 2018 to May 2019. They were enrolled and divided into two groups；17 zirconium dioxide crowns（group ZC）were scanned by 3shape Trios and 3D print moulage was made；17 lithium disilicate glass-ceramic crowns（group LD）were scanned and made by CEREC Omnicam. The restoration quality was evaluated using modified USPHS standard. The satisfaction form was filled by patients one month later. Results　There were no statistically significant differences between the clinical effects （expect the color） of the two groups（P > 0.05）. After one month，there were no statistically significant differences in the evaluations of the shape，comfort level，expenses，and satisfaction between the two groups（P > 0.05），and most of the evaluations were good. The color matching in group ZC was higher than in group LD（P < 0.05）. Conclusion　The two kinds of treatment methods both gain good clinical effect and satisfaction in the patients. The restorations using 3D printing technology have a better appearance.

Key words: computer aided design and computer aided manufacturing, CAD/CAM；intraoral scanner；3D printing technology