Digital impressions’ accuracy through “cut-out-rescan” and “data exchange by over scanning” techniques in complete arches of two intraoral scanners and CAD/CAM software

Passos, Leandro; Meiga, Sergio; Brigagão, Vinicius; Neumann, Marcus A.; Street, Alexandre

doi:10.2186/jpr.jpr_d_20_00089

Cited by 13 publications

(18 citation statements)

References 10 publications

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“…Therefore, it was deemed necessary to verify if the cutting-out procedure affects the accuracy of the scan. In accordance with a recent study, the cutting-out technique did not obtain clinical significative differences in terms of both trueness and precision, when compared to scanning technique 1 [ 23 ]. It could be speculated that, if necessary, re-scanning a specific area of the dental arch does not affect the overall accuracy of the scan itself.…”

Section: Discussionsupporting

confidence: 89%

Intraoral Scans of Full Dental Arches: An In Vitro Measurement Study of the Accuracy of Different Intraoral Scanners

Giuliodori¹,

Rappelli

Aquilanti

2023

IJERPH

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The aim of this in vitro study was to evaluate the accuracy of different intraoral scanners (IOS), according to different scanning strategies and to the experience of the operator. Six IOS setups were used in this study. Ten scans of a complete epoxy-resin-made maxillary dental arch were performed with each IOS, using four different scanning techniques (manufacturer-suggested scanning strategy, cut-out rescan technique, simplified scanning technique, novel scanning technique). Scans were also performed by an expert operator in the field of digital dentistry. An operator with no experience in the field of intraoral scans performed 10 scans following each of the scanning strategy suggested by the manufacturer. The master model was scanned with an industrial high-resolution reference scanner to obtain a highly accurate digitized reference model. All the digital models were aligned with the reference model using a software aimed at comparing the STL files. A total of n = 300 scans were performed. Once the data were pooled, Medit i700 and Primescan obtained the best results in terms of both trueness and precision, showing no statistically significative differences (p > 0.05) to the first and the second scanning technique, Medit i700 scanner allowed to obtain the best values both in terms of trueness (24.4 ± 2.1 μm and 21.4 ± 12.9 μm, respectively) and precision compared to other IOS (23.0 ± 1.6 μm and 30.0 ± 18.0 μm, respectively). When considering the third scanning technique, Medit i700 recorded the best values in terms of trueness while Primescan recorded the best values in terms of precision (24.0 ± 2.7 μm and 26.8 ± 13.7 μm, respectively). When considering the two operators, significant differences between the two were found only with Medit i700 (p < 0.001). The examined IOS showed statistically significant differences in terms of trueness and precision. The used scanning strategy is a factor influencing the accuracy of IOS. Considering the expertise of the operators, clinically scanning strategies are not operative sensitive in terms of accuracy.

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Section: Discussionsupporting

confidence: 89%

Intraoral Scans of Full Dental Arches: An In Vitro Measurement Study of the Accuracy of Different Intraoral Scanners

Giuliodori¹,

Rappelli

Aquilanti

2023

IJERPH

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“…77 In a recent study published in 2022, authors demonstrated that the impact of the cutting off and rescanning procedures on scanning accuracy varied depending on the IOS tested. 79 Two different IOS from the same manufacturer, Omnicam and Primescan systems, were assessed.…”

Section: Cutting-off Rescaning and Overlapping Methodsmentioning

confidence: 99%

“…Cutting off and rescanning procedures have been identified in the dental literature as factors that can decrease intraoral scanning accuracy. [76][77][78][79] Previous laboratory and clinical studies have demonstrated that rescanning mesh holes significantly decreases the accuracy of intraoral digital scans. [76][77][78][79] Furthermore, the higher the number and diameter of the mesh holes rescanned, the lower the accuracy.…”

Section: Cutting-off Rescaning and Overlapping Methodsmentioning

confidence: 99%

“…The Primescan system was found to be more negatively impacted by these cutting off and rescanning procedures that its predecessor IOS device tested. 79 However, the studies analyzing the influence of cutting off and rescanning procedures are scarce. Studies are needed to further assess the impact of those scanning procedures on the accuracy of virtual casts, as well as its influence on the fit of the definitive restorations.…”

Section: Cutting-off Rescaning and Overlapping Methodsmentioning

confidence: 99%

“…Two different IOS from the same manufacturer, Omnicam and Primescan systems, were assessed. The Primescan system was found to be more negatively impacted by these cutting off and rescanning procedures that its predecessor IOS device tested 79 . However, the studies analyzing the influence of cutting off and rescanning procedures are scarce.…”

Section: Introductionmentioning

confidence: 99%

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A guide for maximizing the accuracy of intraoral digital scans. Part 1: Operator factors

Revilla‐León

Kois

2022

J Esthet Restor Dent

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Objectives To describe the factors related to the operator skills and decisions that influence the scanning accuracy of intraoral scanners (IOSs). A new classification for these factors is proposed to facilitate dental professionals' decision making when using IOSs and maximize the accuracy and reliability of intraoral digital scans. Overview Each IOS system is limited by the hardware and software characteristics of the selected device. The operator decisions that can influence the accuracy of IOSs include the scanning technology and system selection, scanning head size, calibration, scanning distance, exposure of the IOS to ambient temperature changes, ambient humidity, ambient lighting conditions, operator experience, scanning pattern, extension of the scan, cutting off, rescanning, and overlapping procedures. Conclusions The knowledge and understanding of the operator factors that impact scanning accuracy of IOSs is a fundamental element for maximizing the accuracy of IOSs and for successfully integrating IOSs in daily practices. Clinical Significance Operator skills and clinical decisions significantly impact intraoral scanning accuracy. Dental professionals must know and understand these influencing operator factors for maximizing the accuracy of IOSs.

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Influence of repeated cut-off and rescanning on the trueness of the intraoral digital scans

Guo,

Lu,

et al. 2024

Journal of Dentistry

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Digital impressions’ accuracy through “cut-out-rescan” and “data exchange by over scanning” techniques in complete arches of two intraoral scanners and CAD/CAM software

Cited by 13 publications

References 10 publications

Intraoral Scans of Full Dental Arches: An In Vitro Measurement Study of the Accuracy of Different Intraoral Scanners

Intraoral Scans of Full Dental Arches: An In Vitro Measurement Study of the Accuracy of Different Intraoral Scanners

A guide for maximizing the accuracy of intraoral digital scans. Part 1: Operator factors

Influence of repeated cut-off and rescanning on the trueness of the intraoral digital scans

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