Influencia da covergencia axial e do alivio interno na adaptação e resistencia a remoção por tração de coroas totais cimentadas com cimentos resinosos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

The objective of this study was to evaluate the influence of axial convergence and relief on the marginal adaptation and retention of cemented complete crowns with Scothbond resin cement (3M) and Enforce resin cement (Dentsply). Sixteen hundred recently extracted bovine incisors were prepared to receive full cast crows, standardized preparations were made and the crows were made in a Ni-Cr alloy. Eight groups were formed according to: axial convergence (24° and 32°), relief and luting agent. The crowns were cemented according to the manufacturer s instructions, utilizing a 9 Kg static 1000 for two minutes. The specimens were thermocycled for 1500 cycles (5°C:t 2°C e 55°C ± 2°C). The crowns were sectioned with a diamond disk and polished. The marginal aptation was measured using a microscope with 40X of magnification (Leitz). The results were submitted to the ana1ysis of variance (ANOV A). The results of analysis were significant at the 5% leveI, and the Tukey multiple comparisons test was applied at the 5% leveI of significance. We concluded: 1) the crown adaptation was improved with the increase ofthe convergence ofthe 24° to 32°; 2) the crown adaptation was improved with the relief; 3) the crown adaptation was improved with scotchbond resin cement when it was comparable to enforce resin cement; 4) the increase of the convergence ofthe 24° to 32° decreased the crown retention to scotchbond resin cement; 5) The relief decreased the crown retention; 6) the crown retention was improved on axial convercence of24° to scotchbond resin cement when comparable to enforce resin cement

ASSUNTO(S)

boca - adaptação coroas (odontologia) propriedades mecanicas materiais dentarios protese dentaria

ACESSO AO ARTIGO

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