Influence of Scanning-Aid Materials on the Accuracy and Time Efficiency of Intraoral Scanners for Full-Arch Digital Scanning: An In Vitro Study

Oh, Hyun-Su; Lim, Young-Jun; Kim, Bongju; Kim, Myung‐Joo; Kwon, Ho-Beom; Baek, Yeon-Wha

doi:10.3390/ma14092340

Cited by 22 publications

(24 citation statements)

References 24 publications

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“…The less accurate reproduction of the attachments may be present in models with asymmetries between the right and left sides of the arch. This inaccuracy could be because the intraoral scanner constructs the image using mirror reproduction [ 33 ].…”

Section: Discussion and Results Interpretationmentioning

confidence: 99%

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Performance of Rigid and Soft Transfer Templates Using Viscous and Fluid Resin-Based Composites in the Attachment Bonding Process of Clear Aligners

Valeri

Aloisio

Mummolo

et al. 2022

International Journal of Dentistry

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Objectives. The study aims at assessing the accuracy of the process of attachment bonding in aligner treatments. The analysis leads to the error estimation in the faithful reproduction of master model attachments using two types of transfer templates and two light-curing resin-based composites usually used in orthodontics. Methods. The authors have used two transfer templates made of two different materials. The first, named Leone-biocompatible thermoforming material hard/soft, has a lower Young’s modulus and is labelled as soft, while the other, named Leone-biocompatible thermoforming material, is marked as rigid. The resin-based composites possess different mechanical and rheological properties. Specifically, Transbond™ XT Light Cure Paste Adhesive, 3M has a higher viscosity than the TetricEvoflow, Ivoclar Vivadent, a flowable nanohybrid composite. The authors attempt to estimate the performance ranking between the four possible couples obtained by combining the two light-curing resin-based composites and transfer templates. Each combination was repeated in six models and compared with twelve master models, resulting in 36 total samples. A 3-D laser scanner is used to generate a digital model of each model. The comparison between digital models is the base for a comparative assessment in terms of relative and absolute error. The relative error is estimated using scalar performance indicators ranging from 0 to 1, where 1 indicates the optimum matching. The absolute error estimated from the mean square error between the coordinates of each digital model yields the reproduction accuracy in micrometer. Furthermore, the authors attempted to assess the error distribution by evaluating the point-by-point difference between the digital models. Results. This analysis aims at localizing the sources of error in the considered models. The use of Transbond™ XT Light Cure Paste Adhesive, 3M with a rigid transfer template is always associated with significant accuracy and minor dispersion. However, in a few instances, using the soft template or the flowable resin-based composite can lead to bad performances. Significance. The data processing bestowed the following performance ranking from the first with lower reproduction error to the last characterized by the worst performance: (1) attachments bonding with rigid template and Transbond™ XT Light Cure Paste Adhesive, 3M, (2) attachments bonding with soft template and Transbond™ XT Light Cure Paste Adhesive, 3M, (3) attachments bonding with rigid template and TetricEvoflow, Ivoclar Vivadent, and (4) attachments bonding with soft template and TetricEvoflow, Ivoclar Vivadent.

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Section: Discussion and Results Interpretationmentioning

confidence: 99%

“…The authors decided not to coat the models with powders or liquids because scanning-aid materials can be more effective on metallic surfaces than resin-like materials [ 33 ]. In addition, the manufacturer does not recommend it.…”

Section: Methodsmentioning

confidence: 99%

Performance of Rigid and Soft Transfer Templates Using Viscous and Fluid Resin-Based Composites in the Attachment Bonding Process of Clear Aligners

Valeri

Aloisio

Mummolo

et al. 2022

International Journal of Dentistry

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“…They found that the application of titania powder before Omnicam scanning improves the vertical fit of crowns and decreases the 3D luting space (i.e., the application of powder affected the edge difference of the crowns). Hyun‐Su Oh et al 112 analyzed the influence of scanning‐aid materials in a set of four experimental groups (three different types of scanning‐aid materials groups and one no‐application group) on two intraoral scanners and found that the application of powder can reduce scanning time and more efficiently obtain full‐arch scanned images. However, if the powder is applied unevenly, it can result in inaccurate scanning of certain areas, increase scanning time, and cause patient discomfort 113 .…”

Section: Factors Influencing the Performance Of 3d Imaging Devicesmentioning

confidence: 99%

An overview of three‐dimensional imaging devices in dentistry

Hou

Zhao

et al. 2022

J Esthet Restor Dent

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Objective To review four types of three‐dimensional imaging devices: intraoral scanners, extraoral scanners, cone‐beam computed tomography (CBCT), and facial scanners, in terms of their development, technologies, advantages, disadvantages, accuracy, influencing factors, and applications in dentistry. Methods PubMed (National Library of Medicine) and Google Scholar databases were searched. Additionally, the scanner manufacturers' websites were accessed to obtain relevant data. Four authors independently selected the articles, books, and websites. To exclude duplicates and scrutinize the data, they were uploaded to Mendeley Data. In total, 135 articles, two books, and 17 websites were included. Results Research and clinical practice have shown that oral and facial scanners and CBCT can be used widely in various areas of dentistry with high accuracy. Conclusion Although further advancement of these devices is desirable, there is no doubt that digital technology represents the future of dentistry. Furthermore, the combined use of different devices may bring dentistry into a new era. These four devices will play a significant role in clinical utility with high accuracy. The combined use of these devices should be explored further. Clinical significance The four devices will play a significant role in clinical use with high accuracy. The combined use of these devices should be explored further.

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“…For instance, not only the matching algorithms of software, but also the sensor quality of the intraoral scanner must be improved [ 17 ]. Scanning strategies such as scanning path, environment control, and application of scanning-aid agents are used to obtain accurate scanned images [ 10 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, to reduce the reflective properties of the metallic surface and increase the accuracy in the case of a long span, surface treatments, such as the application of scanning-aid agents, are frequently suggested. A previous study reported that when a resin-based full-arch model was scanned with the application of scanning-aid materials, the precision of root mean square (RMS) values was improved [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of scanning-aid agents on the scanning accuracy in specially designed metallic models: A laboratory study

Lim

Kim

et al. 2022

PLoS ONE

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The advent of intraoral scanning methods has caused a paradigm shift in dentistry. However, despite their many advantages, intraoral scanners cannot accurately recognize the metallic surfaces of prothesis. Therefore, this experiment was designed to verify the effect of scanning-aid agents on the scanning accuracy using metallic reference models. Three different types of metallic reference models (inlay, onlay, and bridge) were specially designed and produced using a milling machine to simulate intraoral dental restorations. Three experimental groups (application of ScanCure, IP Scan Spray, and VITA Powder Scan Spray) were set up and scanned images (each n = 5) were acquired using the I500® intraoral scanner. The reference datasets were established by a 3D design that reflected the deviations between the measured distances and previously planned distances on the reference models. All acquired experimental datasets were digitally superimposed and compared with the reference datasets. Intragroup comparisons (precision, n = 10) were also performed. The root mean square (RMS) values of trueness in the ScanCure and IP groups were significantly more accurate than those of the VITA group in the inlay and onlay reference models (p < 0.05). Notably, in the bridge reference model, the liquid-type ScanCure group showed the highest accuracy of trueness, with statistical significance (p < 0.05). However, the RMS values of precision were not significantly different among the groups. These findings suggest that liquid-type scanning agents can be effectively used to obtain more accurate scan images of intraoral metallic dental restorations.

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Influence of Scanning-Aid Materials on the Accuracy and Time Efficiency of Intraoral Scanners for Full-Arch Digital Scanning: An In Vitro Study

Cited by 22 publications

References 24 publications

Performance of Rigid and Soft Transfer Templates Using Viscous and Fluid Resin-Based Composites in the Attachment Bonding Process of Clear Aligners

Performance of Rigid and Soft Transfer Templates Using Viscous and Fluid Resin-Based Composites in the Attachment Bonding Process of Clear Aligners

An overview of three‐dimensional imaging devices in dentistry

Effect of scanning-aid agents on the scanning accuracy in specially designed metallic models: A laboratory study

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