The use of an intraoral scanner should be decided on the clinical situation and needs. Crowns fabricated on the subgingival finish line caused inaccurate marginal fit due to poor fabrication reproducibility of the marginal region. Intaglio surface trueness was significantly different in the marginal region, with the highest value in the subgingival location ( P < 0.05). The marginal and internal fit showed significant differences according to locations ( P < 0.05) the marginal fit showed the best results in the supragingival finish line ( P < 0.05). One-way analysis of variance and Tukey HSD test were performed for comparisons (α = 0.05). Intaglio surface trueness was evaluated using a 3D inspection software. Marginal and internal fit were evaluated with a silicone replica technique. Interim crowns were fabricated using a stereolithography three-dimensional (3D) printer (N = 16 per location). Crowns were designed based on the scanned area. The right maxillary first molar tooth preparation model was fabricated using a ceramic material and placed in four finish line locations (supragingival, equigingival, subgingival, and subgingival with a cord). This analysis aimed to evaluate the intaglio surface trueness, antagonist’s wear volume loss, and fracture resistance of full-contour crowns of (Y, Nb)-stabilized fully-sintered zirconia (FSZ), 4 mol% or 5 mol% yttria-stabilized partially sintered zirconia (4YZ or 5YZ) with high-speed sintering.This study evaluated the marginal and internal fit and intaglio surface trueness of interim crowns fabricated from tooth preparation scanned at four finish line locations. ![]() JO - The Journal of Advanced of ProsthodonticsĪB - PURPOSE. T2 - The Journal of Advanced of Prosthodontics TI - Comparative analysis on intaglio surface trueness, wear volume loss of antagonist, and fracture resistance of full-contour monolithic zirconia crown for single-visit dentistry under simulated mastication The full-contour crowns of FSZ as well as 4YZ or 5YZ with high-speed sintering were clinically acceptable, in terms of intaglio surface trueness, antagonist’s wear volume loss, and fracture resistance after simulated mastication. Both the type of zirconia and aging showed statistically significant effects on fracture resistance (P <. No significant P in wear volume loss of antagonists were detected among the groups (P >. The intaglio surface trueness measured at four different areas of the crown was less than 50 μm, regardless of the type of zirconia. Effect of the zirconia type and aging on fracture resistance of crowns was tested using two-way ANOVA. The trueness values were analyzed with Welch's ANOVA, and the wear volume loss with the Kruskal-Wallis tests. Before and after chewing, the fracture load was measured for each group. Half of the specimens were aged for 120,000 cycles in the chewing simulator, and the wear volume loss of antagonist was measured. ![]() The intaglio surface trueness of the crowns was evaluated at the inner surface, occlusal, margin, and axial areas and reported as root-meansquare, positive and negative average deviation. A total of 42 zirconia crowns were separated into three groups: FSZ, 4YZ, and 5YZ (n = 14). This analysis aimed to evaluate the intaglio surface trueness, antagonist’s wear volume loss, and fracture resistance of full-contour crowns of (Y, Nb)-stabilized fully-sintered zirconia (FSZ), 4 mol% or 5 mol% yttria-stabilized partially sintered zirconia (4YZ or 5YZ) with high-speed sintering.
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