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Comparison of the accuracy of intraoral scans between complete-arch scan and quadrant scan.

ABSTRACT: OBJECTIVE:To compare the accuracy of complete-arch scans and quadrant scans obtained using a direct chairside intraoral scanner. MATERIAL AND METHODS:Intraoral scans were obtained from 20 adults without missing teeth except for the third molar. Maxillary and mandibular complete-arch scans were carried out, and 4 quadrant scans for each arch were performed to obtain right posterior, right anterior, left anterior, and left posterior quadrant scans. Complete-arch scans and quadrant scans were compared with corresponding model scans using best-fit surface-based registration. Shell/shell deviations were computed for complete-arch scans and quadrant scans and compared between the complete-arch scans and each quadrant scans. In addition, shell/shell deviations were calculated also for each individual tooth in complete-arch scans to evaluate factors which influence the accuracy of intraoral scans. RESULTS:Complete-arch scans showed relatively greater errors (0.09 ~ 0.10 mm) when compared to quadrant scans (0.05 ~ 0.06 mm). The errors were greater in the maxillary scans than in the mandibular scans. The evaluation of errors for each tooth showed that the errors were greater in posterior teeth than in anterior teeth. Comparing the right and left errors, the right side posterior teeth showed a more substantial variance than the left side in the mandibular scans. CONCLUSION:The scanning accuracy has a difference between complete-arch scanning and quadrant scanning, particularly in the posterior teeth. Careful consideration is needed to avoid scanning inaccuracy for maxillary or mandibular complete-arch, particularly in the posterior area because a complete-arch scan might have potential error than a quadrant scan.

SUBMITTER: Moon YG

PROVIDER: S-EPMC7527390 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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Comparison of the accuracy of intraoral scans between complete-arch scan and quadrant scan.

Moon Youn-Gyeong YG Lee Kyung-Min KM

Progress in orthodontics 20201001 1

<h4>Objective</h4>To compare the accuracy of complete-arch scans and quadrant scans obtained using a direct chairside intraoral scanner.<h4>Material and methods</h4>Intraoral scans were obtained from 20 adults without missing teeth except for the third molar. Maxillary and mandibular complete-arch scans were carried out, and 4 quadrant scans for each arch were performed to obtain right posterior, right anterior, left anterior, and left posterior quadrant scans. Complete-arch scans and quadrant s ...[more]

PMID: 33000308

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Project description:BACKGROUND:The literature has not yet validated the use of intraoral scanners (IOSs) for full-arch (FA) implant impression. Hence, the aim of this in vitro study was to assess and compare the trueness of 12 different IOSs in FA implant impression. METHODS:A stone-cast model of a totally edentulous maxilla with 6 implant analogues and scanbodies (SBs) was scanned with a desktop scanner (Freedom UHD®) to capture a reference model (RM), and with 12 IOSs (ITERO ELEMENTS 5D®; PRIMESCAN® and OMNICAM®; CS 3700® and CS 3600®; TRIOS3®; i-500®; EMERALD S® and EMERALD®; VIRTUO VIVO® and DWIO®; RUNEYES QUICKSCAN®). Ten scans were taken using each IOS, and each was compared to the RM, to evaluate trueness. A mesh/mesh method and a nurbs/nurbs method were used to evaluate the overall trueness of the scans; linear and cross distances between the SBs were used to evaluate the local trueness of the scans. The analysis was performed using reverse engineering software (Studio®, Geomagics; Magics®, Materialise). A statistical evaluation was performed. RESULTS:With the mesh/mesh method, the best results were obtained by CS 3700® (mean error 30.4??m) followed by ITERO ELEMENTS 5D® (31.4??m), i-500® (32.2??m), TRIOS 3® (36.4??m), CS 3600® (36.5??m), PRIMESCAN® (38.4??m), VIRTUO VIVO® (43.8??m), RUNEYES® (44.4??m), EMERALD S® (52.9??m), EMERALD® (76.1??m), OMNICAM® (79.6??m) and DWIO® (98.4??m). With the nurbs/nurbs method, the best results were obtained by ITERO ELEMENTS 5D® (mean error 16.1??m), followed by PRIMESCAN® (19.3??m), TRIOS 3® (20.2??m), i-500® (20.8??m), CS 3700® (21.9??m), CS 3600® (24.4??m), VIRTUO VIVO® (32.0??m), RUNEYES® (33.9??m), EMERALD S® (36.8??m), OMNICAM® (47.0??m), EMERALD® (51.9??m) and DWIO® (69.9??m). Statistically significant differences were found between the IOSs. Linear and cross distances between the SBs (local trueness analysis) confirmed the data that emerged from the overall trueness evaluation. CONCLUSIONS:Different levels of trueness were found among the IOSs evaluated in this study. Further studies are needed to confirm these results.

Dataset Information

Comparison of the accuracy of intraoral scans between complete-arch scan and quadrant scan.

Publications

Comparison of the accuracy of intraoral scans between complete-arch scan and quadrant scan.

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