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http://dx.doi.org/10.14347/kadt.2019.41.4.263

Comparison of the Internal Fitness of Prostheses Fabricated with Non-Contact Extra-Oral Scanner and Intra-Oral Video Scanner  

Park, Jin-Young (Institute for Health Science, College of Public Health Science, Korea University)
Kim, Ji-Hwan (Department of Dental Laboratory Science & Engineering, College of Health Science, Korea University)
Jeong, Il-Do (Institute for Health Science, College of Public Health Science, Korea University)
Lee, Gwang-Young (Department of Dental Laboratory Technology, Wonkwang Health Science University)
Kim, Won-Soo (Department of Dental Laboratory Technology, Dae-jeon Health Science of College)
Publication Information
Journal of Technologic Dentistry / v.41, no.4, 2019 , pp. 263-269 More about this Journal
Abstract
Purpose: The purpose of this study was to evaluate the internal fitness of prostheses fabricated with non-contact extra-oral scanner and those fabricated with intra-oral video scanner, with a comparative accuracy analyses of their precision and trueness. Methods: A polymethyl methacrylate (PMMA) model was fabricated by replicating a master model. The prostheses in the first group were fabricated based on the PMMA model with an intra-oral video scanner (IVS group). Following the fabrication of work models with Type IV Stone that were based on the PMMA model, the prostheses in the second group were fabricated with a non-contact extra-oral scanner (ENB group). The precision and trueness of the prostheses were calculated from comparisons of the three-dimensional images of the internal surfaces of the prostheses and those of the master model. Kruskal-Wallis tests were used to determine the statistical significance, with the level of type 1 error set at 0.05. Results: Trueness (P < 0.009) and precision (P < 0.001) did not differ significantly between the ENB and IVS groups. The IVS group exhibited lower trueness values and larger precision values than the ENB group. Conclusion: Although no significant differences were found in the internal fitness of the prostheses that were fabricated by the two different scanners, the intraoral video scanner-fabricated prostheses had better trueness, whereas the non-contact extra-oral scanner-fabricated prostheses had better precision.
Keywords
Accuracy; CAD/CAM; Color-difference map; Precision; Three-dimensional analysis; Trueness;
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Times Cited By KSCI : 2  (Citation Analysis)
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