High temperature dimensional alterations of implant supportedframeworks
Braz. j. oral sci
;
4(12): 689-694, Jan.-Mar. 2005. ilus, tab
Artigo
em Inglês
| LILACS, BBO
| ID: lil-412439
RESUMO
The present in vitro study was designed to evaluate the effect of high temperature firing cycles used for application of porcelain veneer in the misfit of implant supported frameworks, and the effect of a pre-heating treatment on the dimensional alterations of implant supported frameworks. The investigation was conductedbased on the results given by 14 nickel-chromium (06 elements metal structures. Half of the structures formed the control group and were exposed to simulated porcelain firings. The other half formed the test group, and were submitted to a pre-heating treatment with the implant frameworks embedded in investment, before the porcelain firing simulation. The marginal misfit measurements inboth groups were made before and after the porcelain firing simulation, by using a scanning electron microscope. The results were submitted to statistical analysis of variance. The multiple comparisons were made by means of the Bonferroni ôtõ test. For the frameworks produced in the usual manner, without the preheatingtreatment (control group), misfit deteriorates during thehigh temperature firing cycles employed for porcelain application. In the test group, pre-heating treatment did not change the final metal distortion resulting from the porcelain firing cycles, and the greatest amount of the distortion took place before the conventional porcelain firing cycles
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Índice:
LILACS (Américas)
Assunto principal:
Implantes Dentários
/
Osseointegração
/
Ligas Metalo-Cerâmicas
Idioma:
Inglês
Revista:
Braz. j. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2005
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Federal University of Santa Catarina/BR
/
Paulista State University Júlio de Mesquita Filho/BR
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