Resumo

NICOLUZZI, Alexandro et al. The influence of accelerated aging in compressive resistance composite resins. Acta odontol. venez [online]. 2008, vol.46, n.4, pp.465-468. ISSN 0001-6365.

The objective of this work was to verify the influence of the Sped up Artificial Aging in the compressive strength of 3 composed resins. It was used a matrix of nylon for confection of 48 bodies of test with 8,0mm of height and 4,0mm of width, having been 16 with the Filtek resin Supreme(3M), 16 with Charisma (Heraeus Kulzer) and 16 with Filtek Z-250(3M). For the confection of the test bodies the incremental technique was used respecting the time of curing indicated for the manufacturers. Passed 24 hours, half of the bodies of test of each material was submitted to the compressive assay in the Universal Machine of Assays (EMIC DL-2000) with load cell of 2000Kgf and speed of 0,05mm/min. To another half it was submitted to the artificial aging sped up in the C-UV machine Sped up System of Aging for not metallic - ASTM-G-53 for 192 hours that is equivalent approximately the 5 years of aging and later submitted to the compressive assay. Analysis was become fullfilled comparative statistics between the gotten results using ANOVA/Tukey (P<0.05). It was verified that it did not have difference statistics in the compressive strength between the resins aged and not aged Z-250 and Filtek Supreme. However difference occurred statistics between aged and not aged the Charisma resin.

Palavras-chave : Composite resins; compressive strength; materials testing.