Comparative study of the adaptation between metallic copings and alumina, in system In-Ceram, before and after cementation / Estudo comparativo da adaptação entre copings metalicos e de alumina, no sistema In-Ceram, antes e apos cimentação

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The purpose of this study was to evaluate the marginal fit before and after cementation of metal and aluminium oxide In-Ceram copings, on bovine teeth preparation using two kinds of cement. Sixty bovine incisors were embedded in resin and the coronal portions of the teeth were prepared to receive complete crowns usin a 4103 diamond bur under refrigeration with 8o of tapering and right shoulder. Thirty crowns were fabricated for each coping. The crowns were then seated on the teeth with 9 Kgf static loads for 1 minute and the marginal discrepancy was mensured using a microscopic (STM). Afterwards, the copings were removed and fifteen samples of each coping were luted on the teeth with zinc phosphate (SS White/Esp, Petrópolis, RJ. Brasil) and resin cement (Rely X ARC 3M/ESPE Divisão Dental ? Brasil), applied 9 Kgf static loads for 7 minutes and the marginal discrepancy was mensured again. Data were submitted to analysis of variance and Tukey´s test (5%); results showed that the two copings had cervical fits after cementation statistically higher than those before cementation, concerning both cements. The In-Ceram system showed statistically higher values for the cervical fits when resin cement was used. No statistically significant difference was found between the copings concerning cements with zinc phosphate

ASSUNTO(S)

dental materials dental prosthesis protese dentaria dental cements materiais dentarios cimentos dentarios

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