Please use this identifier to cite or link to this item: https://doi.org/10.1111/jopr.12714
Title: Three-Dimensional Accuracy of Digital Static Interocclusal Registration by Three Intraoral Scanner Systems
Authors: Wong, Kuan Yee
Esguerra, Roxanna Jean 
Chia, Vanessa Ai Ping
Tan, Ying Han 
Tan, Keson Beng Choon 
Keywords: Science & Technology
Life Sciences & Biomedicine
Dentistry, Oral Surgery & Medicine
Static interocclusal registration
intraoral
scanner
accuracy
3D
CMM
ARTICULATION
RECORDS
STL
Issue Date: 1-Feb-2018
Publisher: WILEY
Citation: Wong, Kuan Yee, Esguerra, Roxanna Jean, Chia, Vanessa Ai Ping, Tan, Ying Han, Tan, Keson Beng Choon (2018-02-01). Three-Dimensional Accuracy of Digital Static Interocclusal Registration by Three Intraoral Scanner Systems. JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY 27 (2) : 120-128. ScholarBank@NUS Repository. https://doi.org/10.1111/jopr.12714
Abstract: Purpose: Prior studies have defined the accuracy of intraoral scanner (IOS) systems but the accuracy of the digital static interocclusal registration function of these systems has not been reported. This study compared the three-dimensional (3D) accuracy of the digital static interocclusal registration of 3 IOS systems using the buccal bite scan function. Materials and Methods: Three IOS systems compared were 3MTM True Definition Scanner (TDS), TRIOS Color (TRC), and CEREC AC with CEREC Omnicam (CER). Using each scanner, 7 scans (n = 7) of the mounted and articulated SLA master models were obtained. The measurement targets (SiN reference spheres and implant abutment analogs) were in the opposing models at the right (R), central (C), and left (L) regions; abutments #26 and #36, respectively. A coordinate measuring machine with metrology software compared the physical and virtual targets to derive the global 3D linear distortion between the centroids of the respective target reference spheres and abutment analogs (dRR, dRC, dRL, and dRM) and 2D distances between the pierce points of the abutment analogs (dXM, dYM, dZM), with 3 measurement repetitions for each scan. Results: Mean 3D distortion ranged from –471.9 to 31.7 μm for dRR, –579.0 to –87.0 μm for dRC, –381.5 to 69.4 μm for dRL, and –184.9 to –23.1 μm for dRM. Mean 2D distortion ranged from –225.9 to 0.8 μm for dXM, –130.6 to -126.1 μm for dYM, and –34.3 to 26.3 μm for dZM. Significant differences were found for interarch distortions across the three systems. For dRR and dRL, all three test groups were significantly different, whereas for dRC, the TDS was significantly different from the TRC and CER. For 2D distortion, significant differences were found for dXM only. Conclusions: Interarch and global interocclusal distortions for the three IOS systems were significantly different. TRC performed overall the best and TDS was the worst. The interarch (dRR, dRC, dRL) and interocclusal (dXM) distortions observed will affect the magnitude of occlusal contacts of restorations clinically. The final restoration may be either hyperoccluded or infraoccluded, requiring compensations during the CAD design stage or clinical adjustments at issue.
Source Title: JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
URI: https://scholarbank.nus.edu.sg/handle/10635/231438
ISSN: 1059941X
1532849X
DOI: 10.1111/jopr.12714
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