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Journal of Applied Oral Science

Print version ISSN 1678-7757On-line version ISSN 1678-7765

Abstract

ANDREATTA FILHO, Osvaldo Daniel et al. Study of thermocycling effect on the bond strength between an aluminous ceramic and a resin cement. J. Appl. Oral Sci. [online]. 2005, vol.13, n.1, pp.53-57. ISSN 1678-7757.  http://dx.doi.org/10.1590/S1678-77572005000100011.

This study evaluated the effect of thermocycling on the bond strength between Procera AllCeram (Nobel-Biocare) and a resin cement (Panavia F, Kuraray CO). Nine ceramic blocks with dimensions of 5x6x6mm were conditioned at one face with Rocatec System (Espe). After, they were luted with Panavia F to composite resin blocks (Clearfil AP-X, Kuraray CO). The nine groups formed by ceramic, cement and composite resin were split up obtaining 75 samples with dimensions of 12x1x1mm and adhesive surface presenting 1mm2±0.1mm2 of area. The samples were divided into 3 groups (n=25): G1 - 14 days in distilled water at 37ºC; G2 - 6,000 cycles in water (5ºC - 55ºC - 30s); G3 - 12,000 cycles in water (5ºC - 55ºC - 30s). The samples were tested in a universal testing machine (EMIC) at a crosshead speed of 1mm/min. Data were analyzed by ANOVA and Tukey tests. The results indicated that mean values of rupture tension (MPa) of G1 (10.71 ± 3.54) did not differ statistically (p <5%) from G2 (9.01 ± 3.90), however there was statistical difference between G1 and G3 (7.28 ± 3.00). It was concluded that thermocycling significantly reduced the bond strength values when samples were submitted to 12,000 cycles.

Keywords : Ceramics; Resin cements; Tensile strength.

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