Accuracy of intraoral impressions: a literature review

Intraoral fingerprints can vary in precision and accuracy, depending on the scanner used. These parameters have not been studied in depth. Objective: To analyze and compare the characteristics of accuracy (precision and veracity) of intraoral digital impressions. Materials and methods: A bibliographic search was carried out in Pubmed and Cochcrane to identify relevant studies on accuracy in intraoral digital impressions by means of image superposition, and standard models for unitary fixed prostheses or short arches, the characteristics of the studies were delimited by the PICOS system , recommended by the PRISMA guide. Results: 3 selected studies met all previously established eligibility criteria. The scanners analyzed and their precision and accuracy results in the 3 studies were: Bluecam: 12.7 ± 2.6 um / 17.5 ± 1.8 um, Omnicam: 12.5 ± 3.7 um / 13.8 ± 1.4 um. Carestream 3500: 0.014mm / 13 ± 1, Zfx Intrascan: 0.033mm / 30 ± 10-45, Bluecam: 0.029mm / 22.5 ± 25-30, Omnicam: 0.031mm / 30 ± 32.5-27.5, True definition: 0.011mm / 10 ± 2.5-7.5. E4D dentist: 97.6 ± 109.2 um / 114.2 ± 80.7 um, Fastscan: 26.0 ± 24.4 um / 45.2 ± 29.8 um, iTero: 25.8 ± 22.5 um / 52.1 ± 38.8 um, Trios: 13.0 ± 12.1 / 49.7 ± 36.6 um, Zfx Intrascan : 132.3 ± 124.4 um / 89.4 ± 64.2 um. Conclusions: The selected studies found different values ​​of precision and veracity according to the type of scanner, the ones with the best performance were: In precision: Bluecam, Trios, Carestream 3500. While in veracity they were: True Definition, Omnicam, Fastscan.

• Main Author: Carrillo Vaca, David Gerardo (author)
• Other Authors: Astudillo Ortiz, Jaime Leonardo (author)
• Format: article
• Language: spa
• Published: 2021
• Subjects: Exactitud de los datos; precisión de medición dimensional; veracidad; impresión digital intraoral; escáneres intraorales; Data Accuracy; Dimensional Measurement Accuracy; Trueness; Intraoral Digital Impression; Intraoral Scanner
• Online Access: https://revistadigital.uce.edu.ec/index.php/odontologia/article/view/3446