Dal Piva, Amanda M. [UNESP]Tribst, Joao Paulo [UNESP]Gondim, Laisa D.Ribeiro, Isabella L.Campos, FernandaArata, AnelyseSouza, Rodrigo O.2019-10-062019-10-062018-12-01Minerva Stomatologica, v. 67, n. 6, p. 234-245, 2018.1827-174X0026-4970http://hdl.handle.net/11449/187122BACKGROUND: To evaluate the influence of aging and milling system on zirconia surface roughness (SR) and phase transformation. METHODS: Eighty crowns were divided in two groups according to yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramic milling system (CAD-Neodent or MAD-Zirkonzahn). The crowns were submitted to different aging protocols (N.=10): 1) no aging; 2) autoclaving; 3) pH cycling; or 4) thermocycling. Next, the samples were submitted to an optical profilometry analysis to determine differences in the S R (um). A n X-ray diffraction analysis (XRD) was performed to quantify the percentage of monoclinic phase transformation. SR data was analyzed by two-way A NOVA (a=0.5%). RESULTS: Aging protocol (P=0.42) and milling system (P=0.08) had no influence on the SR. However, the number of monoclinic phases was influenced by the autoclaving and pH cycling. CONCLUSIONS: The surface roughness of zirconia-based crowns was not influenced by low temperature degradation or milling system. Regarding the phase transformation, autoclaving and pH-cycling aging presented a monoclinic phase increase when compared to the control group and thermocycled groups.234-245engDental materialsProsthodonticsSurface propertiesYttria-stabilized tetragonal zirconiaArtigo10.23736/S0026-4970.18.04138-9Acesso restrito2-s2.0-85057572501