The cumulative effect of error in the digital workflow for complete-arch implant-supported frameworks: An in vitro study

Pan, Yu1,2; Tsoi, James Kit Hon2; Lam, Walter Y. H.2; Zhao, Ke3; Pow, Edmond H. N.2

2022-07-01

10.1111/clr.13968

CLINICAL ORAL IMPLANTS RESEARCH   Impact Factor & Quartile

0905-7161

1600-0501

["Purpose: To investigate the error accumulation and distribution through various stages of the digital workflow for complete-arch implant-supported framework fabrication.","Materials and methods: A resin model of edentulous maxilla with 6 dental implants was scanned using an intraoral scanner for 10 times (Complete-digital group). Ten conventional gypsum casts were made and digitized by a laboratory scanner (Analogue-digital group). Five implant frameworks were designed and milled using CAD-CAM technique for each workflow. Inter-implant distances and angles of the resin model (reference) and frameworks were measured by a coordinate measuring machine, while the scans and virtual frameworks were examined by an inspection software. Effect of type of workflow and the individual stage on the accuracy of the frameworks were analysed by Two-way ANOVA.","Results: The expanded uncertainty of both workflows was similar to 150 mu m and similar to 0.8 degrees. The accuracy of the CAD stage was the highest. In the complete-digital workflow, the greatest distortion was found in the data acquisition stage, while in the analogue-digital workflow, it was found in the CAM stage. Compared with the analogue-digital group, the complete-digital group showed a significant higher precision in the first quadrant, but lower trueness in the second quadrant in data acquisition, and a significantly lower precision in the second quadrant at the CAD stage.","Conclusions: Linear distortions of the complete-digital and analogue-digital workflows were clinically acceptable, while angular distortions were not. Distortions were generally derived from data acquisition and CAM stage. The CAD precision depended on the distortions derived from data acquisition. The complete-digital workflow was not as accurate as the analogue-digital in complete-arch implant rehabilitation."]

CAD-CAM dental implants dimensional measurement accuracy edentulous imaging intraoral scanning jaw three-dimensional

SCI

English

First

Dentistry, Oral Surgery & Medicine ; Engineering

Dentistry, Oral Surgery & Medicine ; Engineering, Biomedical

WOS:000822715200001

WILEY

CLINICAL MEDICINE

Web of Science

1.Southern Univ Sci & Technol, Dept Dent, Shenzhen Peoples Hosp, Clin Med Coll 2,Affiliated Hosp 1,Jinan Univ, Shenzhen, Peoples R China
2.Univ Hong Kong, Fac Dent, Hong Kong, Peoples R China
3.Sun Yat Sen Univ, Guanghua Sch Stomatol, Hosp Stomatol, Guangdong Prov Key Lab Stomatol, Guangzhou, Peoples R China

Pan, Yu,Tsoi, James Kit Hon,Lam, Walter Y. H.,et al. The cumulative effect of error in the digital workflow for complete-arch implant-supported frameworks: An in vitro study[J]. CLINICAL ORAL IMPLANTS RESEARCH,2022.

Pan, Yu,Tsoi, James Kit Hon,Lam, Walter Y. H.,Zhao, Ke,&Pow, Edmond H. N..(2022).The cumulative effect of error in the digital workflow for complete-arch implant-supported frameworks: An in vitro study.CLINICAL ORAL IMPLANTS RESEARCH.

Pan, Yu,et al."The cumulative effect of error in the digital workflow for complete-arch implant-supported frameworks: An in vitro study".CLINICAL ORAL IMPLANTS RESEARCH (2022).