Accuracy of complete-arch digital implant impression with or without scanbody splinting: An in vitro study

• Published in: Journal of dentistry 2022-04, Vol.119, p.104072-104072, Article 104072
• Main Authors: Pozzi, Alessandro, Arcuri, Lorenzo, Lio, Fabrizio, Papa, Andrea, Nardi, Alessandra, Londono, Jimmy
• Format: Article
• Language: English
• Subjects: Accuracy; Algorithms; Complete-arch; Computer-Aided Design; Conformity; Dental Implants; Dental Impression Technique; Dentistry; Deviation; Digital dentistry; Digital impression; Edentulous; Error analysis; Error reduction; Evaluation; Humans; Imaging, Three-Dimensional; Implant scanbody; Intraoral scanner; Maximum likelihood method; Models, Dental; Mouth, Edentulous; Multivariate analysis; Optical scanners; Polyether ether ketones; Scanners; Standard deviation; Three dimensional printing; Transplants & implants; Variance analysis
• ISSN: 0300-5712; 1879-176X
• DOI: 10.1016/j.jdent.2022.104072

To assess accuracy of implant complete-arch digital impression with intraoral scanner (IOS) and implant scanbody splinting (ISS). An edentulous mandibular model with 4 analogues was fabricated. Four polyetheretherketone (PEEK) implant scanbodies (ISBs) were scanned, according to a randomized sequence, by investigated IOS with (ISS+) and without implant scanbody splinting (ISS-), resulting in 30 test and 30 control files. The model was digitized by industrial optical scanner and the related file superimposed to the test and control files by a best fit algorithm. Linear (ΔX, ΔY and ΔZ-axis) and angular deviations (ΔANGLE) were evaluated for each analogue. A global measure of linear absolute error (ΔASS) was calculated considering the sum of absolute linear discrepancies. Influence of ISS and implant position on IOS accuracy was assessed using General Linear Model and possible interaction between ISS and implant position evaluated. Implant position showed a significant main effect (p