%0 Journal Article
%T Restaura£¿£¿o metaloceramica: um estudo comparativo da compatibilidade t¨¦rmica de ligas Ni-Cr e porcelanas odontol¨®gicas
%A ROLLO
%A Jo£¿o Manuel Domingos de Almeida
%A ROSSITTI
%A S¨¦rgio Mazzer
%J Revista de Odontologia da Universidade de S£¿o Paulo
%D 1999
%I Scientific Electronic Library Online
%R 10.1590/S0103-06631999000100013
%X one of the technological applications where a metal-ceramic compatibility is necessary, is the dental restoration build-up, known as metaloceramic. in this case, a porcelain is fused on a metal substructure to have a dental prosthesis. the basic requirement for the success of this dental restoration is the adjustment of the thermal expansion coefficient of each material to achieve a compression stress on the ceramic layer. this study was carried out to obtain the thermal expansion curves for ni-cr alloy and dental porcelains to analyze the thermal compatibility between metal-ceramic. simulating the introduction of a product on the market, an experimental ni-cr alloy was developed and compared with another largely commercialized ni-cr alloy. by analyzing these data, it was possible to verify the compatibility of each metal-ceramic pair regarding the thermal expansion behavior, using the yamamoto£¿s (1985) methods. in conclusion, the results of the new experimental alloy showed values that can include it as one more option inside the ni-cr alloy family used in metaloceramic dental restoration. the results clearly indicate that the methodology and equipment applied to this work are adequate to proceed a comparative study on thermal compatibility of ni-cr alloys and dental porcelains.
%K compatibility
%K metaloceramic
%K dental prosthesis.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-06631999000100013&lng=en&nrm=iso&tlng=en