Abstract

SILVA, Ana Amélia Bianchi e; VEECK, Elaine Bauer; OLIVEIRA, José Pedro Peixoto de  and  SOUZA, Paulo Henrique Couto. Comparison of chemical composition of packable resin composites by scanning electron microscopy. J. Appl. Oral Sci. [online]. 2005, vol.13, n.1, pp. 67-71. ISSN 1678-7757.  http://dx.doi.org/10.1590/S1678-77572005000100014.

OBJECTIVES: the purpose of this study was to compare the chemical composition of four different shades (incisal/extra-light, A2, A3 and B3) of two packable resin composites (SOLITAIRE^®, and PRODIGY CONDENSABLE^TM). METHODS AND MATERIALS: the specimens measured 4mm in diameter and 4mm in thickness. Five specimens were made for each shade of the materials. They were light cured for 40 seconds at a power of 600mW/cm². Subsequently, the specimens were removed from the plates and ground to powder and then pressed into holes measuring 4mm in diameter in a Teflon matrix, using the plates of the same material as base and cover. Specimens were evaluated under SEM with an x-ray detector for the spectroscopic test by energy dispersing. RESULTS: the chemical components found in both materials were practically the same, but in different proportions. Carbon, Oxygen, Aluminum, Silica, Fluoride and Barium were found. CONCLUSIONS: the chemical composition of each same material varied according to each shade analyzed.

Keywords : Packable composite; Spectroscopic test; Composite resins.