The accuracy of the CAD system using intraoral and extraoral scanners for designing of fixed dental prostheses

Abstract

The accuracy of prostheses affects clinical success and is, in turn, affected by the accuracy of the scanner and CAD programs. Thus, their accuracy is important. The first aim of this study was to evaluate the accuracy of an intraoral scanner with active triangulation (Cerec Omnicam), an intraoral scanner with a confocal laser (3Shape Trios), and an extraoral scanner with active triangulation (D810). The second aim of this study was to compare the accuracy of the digital crowns designed with two different scanner/CAD combinations. The accuracy of the intraoral scanners and extraoral scanner was clinically acceptable. Marginal and internal fit of the digital crowns fabricated using the intraoral scanner and CAD programs were inferior to those fabricated using the extraoral scanner and CAD programs.

Marginal and internal fit of CAD/CAM frameworks in multiple implant‐supported restorations: Scanning and milling error analysis

“…Despite the set protocol and accuracy of CAD extraoral scanners, it is still difficult to compare outcomes of published data due to the variability of devices and methodologies used . This study analyzes discrepancies in the vertical and horizontal planes in a setting that resembles closely the actual clinical scenario.…”

“…Despite the set protocol and accuracy of CAD extraoral scanners, it is still difficult to compare outcomes of published data due to the variability of devices and methodologies used 1,18,[23][24][25][26]. This study analyzes discrepancies in the vertical and horizontal planes in a setting that resembles closely the actual clinical scenario.The outcomes of this study show that scanning errors in the vertical plane (3 μm) constitute a small proportion of the MD (100 μm).Interestingly, scanning errors in the horizontal plane (44 μm) are greater and very close to the definitive ID of the suprastructures (49.6 μm).…”

Ceramic Materials and Technologies Applied to Digital Works in Implant-Supported Restorative Dentistry

“…The accuracy of an extraoral scanner is accepted as satisfactory for the clinical level, while many efforts are being made to develop an intraoral scanner that has an accuracy similar Both methods (direct and indirect) employed for data acquisition are based on the technology of optical scanning. The accuracy of an extraoral scanner is accepted as satisfactory for the clinical level, while many efforts are being made to develop an intraoral scanner that has an accuracy similar to that of an extraoral scanner [14]. Because an intraoral scanner should acquire the necessary data when capturing images of small oral structures that have many undercuts in a limited space, the data-capturing principles of the device are different from those of the extraoral scanner, which generally has a camera fixed at the top.…”

Análise comparativa da acurácia de modelos impressos, obtidos a partir de escaneamento intra-oral

“…Já o estudo de Ishida e Miyasaka (2016) utilizou como modelo mestre padrões de preparos de coroas, nas quais foram adaptadas coroas protéticas impressas. Outros estudos in vitro foram realizados com a utilização de diferentes tipos de modelos mestre, como modelos de aço (Caputi;Varvara, 2008;Aeran, 2012;Mehl, 2013;Guth et al, 2013;Manoj et al, 2013;Mehl, 2015;Shimizu et al, 2017), manequim do tipo Typodont (Ng et al, 2014;Cho et al, 2015), crânio seco (Choi et al, 2002;Cuperus et al, 2012;Murugesan et al, 2012) ou modelo de gesso (Bell et al, 2003;Keating et al, 2008;Hwang et al, 2013;Kasparova et al, 2013;Hazeveld et al, 2014;Anh et al, 2016;Flugge et al, 2016;Muller et al, 2016;Papaspyridakos et al, 2016;Wan Hassan et al, 2017). A fragilidade do gesso contra indica a sua utilização como modelo mestre, uma vez que se ocorrer algum tipo de fratura, perde-se a referência de medida para comparações com os outros modelos dos grupos experimentais.…”

“…Outros estudos informaram que a estratégia utilizada seguiu as recomendações dos fabricantes dos escâneres intra-orais Mehl, 2015;Ender et al, 2016). Dois estudos descreveram a estratégia de escaneamento utilizada Sun, 2015;Shimizu et al, 2017). Ao analisar a influência da estratégia de escaneamento, pode-se dizer que o importante foi realizar o escaneamento de maneira padronizada, para que desta forma a possível influência da estratégia de escaneamento fosse minimizada.…”