Artificial Enamel Wear after Prolonged Chewing Simulation against Monolithic Y-TZP Crowns

Abstract

See, stats, and : https:// www. researchgate. net/ publication / 323547450 Deborah , Leonardo , Emerson Martins , Peter , Grace. Artificial. . . . Article CITATIONS 0 READS 3 1 : Some : Corrosion Non - carious - oral Emerson University 12 SEE All. The . Abstract The aim of this study was to evaluate the effect of chewing simulation on wear of artificial enamel abraded against zirconia - based crowns . Fifteen crown preparations were scanned for the manufacturing of crowns using comput - er - aided - design / computer - aided - machining technique (CAD / CAM) , accord - ing to the following (n = 5) : Polished (PM) and glazed (GM) monolithic zir - conia (1 . 5 mm uniform thickness) , and Bilayer (BL - 0 . 8 mm zirconia coping , 0 . 7 mm porcelain veneer) crowns . The samples were cemented and chewing simulation (2 . 5 million cycles / 0 - 80N / artificial saliva / 37˚C) was performed with steatite indenters (6 mm diameter) as antagonists . Assuming the unifor - mity of the unaged samples , antagonists were scanned using a surface profi - lometer and the material loss volume was calculated . Roughness of the crowns ' occlusal surface was also analyzed using the profilometer . Scanning electron microscopy was used to characterize the abraded surface . One - way ANOVA and Tukey test (p = 0 . 05) were employed for analysis of wear results . A significant difference was observed among the groups (p < 0 . 001) . Artificial enamel abraded against porcelain (BL) had significantly higher material loss (0 . 217 mm 3 ± 0 . 015) than those abraded against monolithic zirconia , polished (PM - 0 . 167 mm 3 ± 0 . 02) and glazed (0 . 101 mm 3 ± 0 . 03) , which were similar to each other . Veneering porcelain results in more pronounced wear of the artificial enamel than monolithic zirconia . However , mastication against monolithic Y - TZP also imposes wear to the opposing teeth .