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Wear Characteristics of Dental Ceramic CAD/CAM Materials Opposing Various Dental Composite Resins

Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea
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Materials 2019, 12(11), 1839; https://doi.org/10.3390/ma12111839
Received: 30 April 2019 / Revised: 22 May 2019 / Accepted: 3 June 2019 / Published: 6 June 2019
The aim of this study was to evaluate the wear properties of opposed dental ceramic restorative CAD/CAM materials and several posterior direct restorative composite resins. Three kinds of dental ceramics CAD/CAM materials (monolithic zirconia, lithium disilicate, leucite) and four dental composite resins—that is, MI Gracefil, Gradia Direct P, Estelite Σ Quick, and Filtek Supreme Ultra—were used in this study. For each of the 12 groups (three ceramics × four composite resins), five each of a canine-shaped ceramic specimen and a cuboidal shape opposing composite resin were prepared. All of the specimens were tested in a thermomechanical loading machine (50 N, 100,000 cycles, 5/55 °C). Wear losses of ceramic specimens and composite resin specimens were evaluated using a three-dimensional profiling system and an electronic scale, respectively. Statistical analyses were performed using the Kruskal–Wallis test and Mann–Whitney U test with Bonferroni’s correction. Zirconia showed significantly less volumetric loss than lithium disilicate or leucite regardless of composite resin type (p > 0.05/3 = 0.017), and that Estelite Σ Quick showed significantly more weight loss than Filtek Supreme Ultra, MI Gracefil, or Gradia Direct P regardless of ceramic type (p > 0.05/6 = 0.083). Zirconia showed less volumetric loss than lithium disilicate or leucite. Some composite resins opposing ceramics showed considerable weight loss. View Full-Text
Keywords: monolithic zirconia; lithium disilicate; leucite; composite resin; wear monolithic zirconia; lithium disilicate; leucite; composite resin; wear
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Gwon, B.; Bae, E.-B.; Lee, J.-J.; Cho, W.-T.; Bae, H.-Y.; Choi, J.-W.; Huh, J.-B. Wear Characteristics of Dental Ceramic CAD/CAM Materials Opposing Various Dental Composite Resins. Materials 2019, 12, 1839.

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