Please use this identifier to cite or link to this item: https://doi.org/10.1111/jopr.12723
Title: Three-Dimensional Static Articulation Accuracy of Virtual Models - Part I: System Trueness and Precision
Authors: Yee, Sophia Hui Xin
Esguerra, Roxanna Jean 
Chew, Amelia Anya Qin'An
Wong, Keng Mun 
Tan, Keson Beng Choon 
Keywords: Science & Technology
Life Sciences & Biomedicine
Dentistry, Oral Surgery & Medicine
Coordinate measuring machine
model scanner systems
precision
static articulation accuracy
trueness
DENTAL IMPRESSIONS
LINEAR EXPANSION
OCCLUSAL RECORD
VITRO
SCANNER
CAD/CAM
CROWNS
Issue Date: 1-Feb-2018
Publisher: WILEY
Citation: Yee, Sophia Hui Xin, Esguerra, Roxanna Jean, Chew, Amelia Anya Qin'An, Wong, Keng Mun, Tan, Keson Beng Choon (2018-02-01). Three-Dimensional Static Articulation Accuracy of Virtual Models - Part I: System Trueness and Precision. JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY 27 (2) : 129-136. ScholarBank@NUS Repository. https://doi.org/10.1111/jopr.12723
Abstract: Purpose: To evaluate the 3D static articulation accuracy of 3 model scanner-CAD systems (Ceramill Map400 [AG], inEos X5 [SIR], Scanner S600 Arti [ZKN]) using a coordinate measuring machine (CMM). Trueness and precision for each system will be reported in Part I. Materials and Methods: The master model simulated a single crown opposing a 3-unit fixed dental prosthesis. Five mounted stone cast sets were prepared, and one set was randomly selected. Reference values were obtained by measuring interarch and interocclusal reference features with the CMM. The stone cast set was scanned 5 times consecutively and articulated virtually with each system (3 test groups, n = 5). STL files of the virtual models were measured with CMM software. dRR, dRC, and dRL, represented interarch global distortions at right, central, and left sides, respectively, while dRM, dXM, dYM, and dZM represented interocclusal global and linear distortions between preparations. Results: For trueness values, mean interarch global distortions ranged from 13.1 to 40.3 μm for dRR, –199.0 to –48.1 μm for dRC, and –114.1 to –47.7 μm for dRL. Mean percentage error of interarch distortion did not exceed 0.6%. Mean interocclusal distortions ranged from 16.0 to 117.0 μm for dRM, -33.1 to 101.3 μm for dXM, 32.9 to 49.9 μm for dYM and –32.0 to 133.1 μm for dZM. ANOVA of trueness found statistically significant differences for dRC, dRL, dRM, dXM, and dZM. For precision values, absolute mean difference between the 10 superimposition combinations ranged from 25.3 to 91.0 μm for dRR, 21.5 to 85.5 μm for dRC, 24.8 to 70.0 μm for dRL. Absolute mean difference ranged from 49.9 to 66.1 μm for dRM, 20.7 to 92.1 μm for dXM, 86.8 to 96.0 μm for dYM, and 36.5 to 100.0 μm for dZM. ANOVA of precision of all test groups found statistically significant differences for dRR, dRC, dRL, dXM and dZM, and the SIR group was the least precise. Conclusion: The overall interarch global distortion of all three model scanner-CAD systems was low and did not exceed 0.6%. Variations in scanner technology, virtual articulation algorithm, and use of physical articulators contributed to the differences in distortion observed among all three groups.
Source Title: JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
URI: https://scholarbank.nus.edu.sg/handle/10635/231439
ISSN: 1059941X
1532849X
DOI: 10.1111/jopr.12723
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