| 2644 Shear bond strength between cast or milled titanium to ceramics | ||
|
D.K. OYAFUSO, M.P. NEISSER, M.A. BOTTINO, M.K. ITINOCHE, M.C.A. CARVALHO, and D.R. SILVA NETO, São José dos Campos University, UNESP - School of Dentistry, São Paulo, Brazil In recent years titanium has become a material of great interest in prosthetic dentistry. Objectives: This in vitro study evaluated the shear bond strength of two dental porcelains to cast and milled pure titanium. Methods: Twenty metallic structures (4 mm diameter x 4 mm thick) of each metal (cast or milled titanium) were shaped and abraded with aluminum oxide. The structures were separated in four groups of ten and two of them were veneered applying Triceram (Sprident) ceramic system and the others with Noritake (Shofu) ceramic system. The bond, opaque and dentin ceramic were applied and baked according to the manufacturer's instructions. The dentin layer were build up by using a teflon matrices, which helped to standardize the specimens. After baking, shear bond strength tests were performed by using a special device to concentrate the strength at the metal/ceramic interface during the test on an Instron Universal testing machine. The load was applied until the fracture of the specimens.Results: Data was analyzed statistically (2–way ANOVA and Tukey test) and the results didn't show significant statistic differences (alfa=5%) between the cast (68.61MPa) and milled (63.12MPa) titanium or between Triceram and Noritake porcelains that registered 64.38MPa and 67.38MPa, respectively. The MEV-EDS analysis was realized to analyze the specimens after mechanical test. The images showed the most part of the fractures occurred between the titanium and his oxide layer for all groups. Conclusions: It was possible to conclude that both cast and milled pure titanium can be used with the tested ceramics. | ||
| Seq #246 - Other Ceramics and Cements 3:45 PM-5:00 PM, Friday, 8 March 2002 San Diego Convention Center Exhibit Hall C | ||
|
Back to the Dental Materials: III - Ceramics and Cements Program
| ||