![]() Since the size of the scanning window of IOSs is limited to allow manipulation of the scanner wand within the confined space of the oral cavity, a series of scan images is captured to create a virtual 3D model. In digital implant rehabilitation, the accuracy of IOSs relates to the final outcome of implant treatment because implant abutments and prostheses are constructed from digital models obtained by IOSs 6, 7, 8. Therefore, discrepancies between implant components should be minimal. This fundamental principle also applies to components of dental implant prostheses and restorations 5. When a physical dental cast is required, subtractive (milling) or additive technologies could be employed to construct a positive model from the digital dataset.ĭental restorations such as crowns, bridges, inlays, and veneers should precisely fit onto prepared teeth to enhance their longevity by minimizing complications associated with misfits between tooth substrate and restoration 4. However, traditional fabrication of dental casts could be simplified using an IOS, which creates a digital 3D dental model from which dental restorations could be fabricated. Performance of traditional impressions involve placing a material-loaded tray into the patient’s mouth, allowing it to set around the patient teeth for a certain period of time, and then removing it 1. ![]() With the improvements in accuracy and convenience together with the affordable cost of IOSs since its first appearance more than 30 years ago, use of IOSs in daily dental practice is increasing 1, 2, 3. The lowest amount of deviation was found at the cylinder next to the reference origin, while the highest deviation was evident at the contralateral side for all IOSs ( p 0.05), and the DWIO and PlasScan had the lowest trueness in partially edentulous mandible digital implant scans ( p < 0.001).Īn intraoral scanner (IOS) is a device used to translate 3-dimensional (3D) geometric information of intraoral structures into digital data. The type of IOSs and position of simulated cylindrical scan bodies affected the magnitude and direction of deviations on trueness. Deviation from the actual positions of the 6 cylinders along the XYZ axes and the overall 3D deviation of the digital scan were calculated. Digital scans of each IOS were compared with the reference dataset obtained by means of a coordinate measuring machine. ![]() The aim of this study was to evaluate the performance of 10 intraoral scanners (IOSs) (CEREC Omnicam, CEREC Primescan, CS 3600, DWIO, i500, iTero Element, PlanScan, Trios 2, Trios 3, and True Definition) in obtaining the accurate positions of 6 cylinders simulating implant scan bodies. Few investigations have evaluated the 3-dimensional (3D) accuracy of digital implant scans.
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