Effect of prefabricated auxiliary devices and scanning patterns on the accuracy of complete-arch implant digital impressions

• Published in: Journal of dentistry 2024-01, Vol.140, p.104788-104788, Article 104788
• Main Authors: Wu, Hio Kuan, Chen, Guanhui, Wang, Jing, Zhang, Zhengchuan, Huang, Xiaoqiong, Lin, Xiaoxuan, Deng, Feilong, Li, Yiming
• Format: Article
• Language: English
• ISSN: 0300-5712; 1879-176X
• DOI: 10.1016/j.jdent.2023.104788

This study aimed to evaluate the impact of prefabricated auxiliary devices (PAD) and scanning patterns on the accuracy of complete-arch implant digital impressions. An edentulous maxillary model was inserted with four parallel implant analogs and four PAD. The model was scanned with D2000 dental laboratory scanner as the reference scans. Test scans were obtained by 8 different scanning patterns (SP), which including SPA, SPB, SPC, SPD, SPE, SPF, SPG and SPH, with (test group) or without (control group) using the PAD by an intraoral scanner (Aoralscan 3, 3DShining). SPA was the scanning pattern recommended by the manufacturer. Each scanning time was recorded. The related files were imported into inspection software for assessment. Aligned Ranks Transformation ANOVA, Kruskal-Wallis and Mann-Whitney tests were used to evaluate the values. The level of significance was set at α = 0.05. The scanning patterns significantly influenced the linear accuracy in the test group and the scanning time for both groups. Lower linear trueness in the test group was found in SPF (p