Artigo
Bond strength and Raman analysis of the zirconia-feldspathic porcelain interface
Registro en:
The Journal of Prosthetic Dentistry, v. 112, n. 4, p. 886-894, 2014.
0022-3913
10.1016/j.prosdent.2014.02.009
9354064620643611
Autor
Borges, Ana Flávia Sanches
Ramos, Carla Muller
Mondelli, Rafael Francisco Lia
Cesar, Paulo
Tabata, Américo Sheitiro [UNESP]
Santos, Juliete de Souza
Resumen
The test groups were experimental zirconia, Zirkonzahn zirconia, and Schuetz zirconia. Blocks of partially sintered zirconia were cut into disks (n=20) and then veneered with a feldspathic porcelain. Half of the specimens from each group (n=10) were incubated in 37°C water for 24 hours, and the other half were thermocycled. All the specimens were then subjected to shear testing. The fractured areas were analyzed with optical stereomicroscopy and classified as adhesive, cohesive, or an adhesive-cohesive failure. Spectral patterns were examined to detect bands related to the zirconia and feldspathic porcelain phases. The shear strength data were submitted to 2-way ANOVA. Results No significant differences in shear bond strength were observed among the 3 groups, regardless of whether or not the specimens were thermocycled. Adhesive failures were the most prevalent types of failure (70%). Raman spectra were clearly distinguished for all the materials, which showed the presence of tetragonal and monoclinic phases. Conclusions The controlled production of the experimental zirconia did not influence the results of the bond strength. Raman analysis suggested a process of interdiffusion by the presence of peaks associated with the zirconia and feldspathic ceramics. Universidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Física, Faculdade de Ciências de Bauru, Bauru, Av. Eng. Luiz E.C. Coube S/N, CEP 17033-360, SP, Brasil Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil Department of Biomaterials and Oral Biology, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil Department of Physics, Faculty of Science, São Paulo State University, Bauru, SP, Brazil Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil Universidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Física, Faculdade de Ciências de Bauru, Bauru, Av. Eng. Luiz E.C. Coube S/N, CEP 17033-360, SP, Brasil