Avaliação da retenção de pinos de fibra de vidro reembasados (pinos anatomicos) e não reembasados cimentados em diferentes condições / Evaluation of relined (anatomic post) and non relined fiber glass posts retention cemented in different conditions

AUTOR(ES)

Vanessa Cruz Macedo

DATA DE PUBLICAÇÃO

2009

RESUMO

This study evaluated the effect of the relining (anatomic posts), of type cements and the length of the luting on the retention of fiber glass posts. One hundred and eighty bovine incisors were selected, their coronary portion removed, and the canals endodontically treated. After endodontic treatment, the canals were extended with diamonds burs nº 4138 and 4137. The roots were divided initially in two groups: G1 - fiber glass posts without relining and G2 - fiber glass posts relined with composite resin (anatomic posts). Each group was subdivided in three subgroups according with the type of cements used: A - RelyX ARC, B - RelyX Unicem, and C - RelyX Luting. The subgroups were luting in three different length in the canals: 5 mm, 7.5 mm and 10 mm, totality 10 roots for each subgroup (n=10). All samples were submitted to tensile bond strength testing in a universal testing machine, with speed of the 0.5 mm/min. The results in kgf were converted in MPa and submitted by ANOVA three factors and significance level at 95%. The results displayed that there weren t difference between the resins cements RelyX ARC and RelyX Unicem, when luting in different length. The cement RelyX Luting 2, showed lowers values of bond strength. The fiber glass posts relined (anatomic post) showed higher values than those posts without relined. Could be concluded that the fiber glass posts relined (anatomic posts), luting in length of the 5 mm obtained the best results when luted with the resin cements RelyX ARC e RelyX Unicem.

ASSUNTO(S)

materiais dentarios dental materials

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