Resumen

MARTIN, Javier et al. Effects of Five Composite Polishing Systems over Crown and Root Surface: SEM and Optical observations. Acta odontol. venez [online]. 2009, vol.47, n.1, pp.18-27. ISSN 0001-6365.

The aim of this IN VITRO study was to describe the crown and root surface surrounding composite restorations, after polishing procedures. Materials and Methods: 50 standardized restorations were made over the crown surface and 50 over the root surface of teeth extracted by orthodontics indications. The cavities were prepared using cylindrical carbide burs (Meissinger) under water irrigation with a high speed hand piece (Champion Dental Products Inc) and restored with hybrid composite (Filtek Z250^®, 3M^®). They were randomized and separated into five groups of 10 restorations either in crown and root. Each group was polished using different systems, according to manufacturer’s instructions. Group 1(PB): Arkansas Stone (Dedeco). Group 2 (PD): Fine, extrafine and ultrafine Diamond Burs (Diatech^®). Group 3 (DOA): Aluminum Oxide Discs (Sof lex^® 3M^®). Group 4 (PG): Enhance^® Points (Dentsply^®). Group 5 (FCT): 16 and 30 blades Tungsten Carbide Burs (Komet^®). 10 teeth without treatment were used as control group (Group 6). All samples were analyzed and photographed by SEM (TEAC Siemens^®), and Optical microscope (Carl Zeiss^®). The images were compared with control group. Results: The comparison of the microphotography with control group showed changes in both crown and root surfaces in groups 1, 2, 3 and 4. It was seen a loss of the enamel superficial characteristics, in crown surfaces and a loss of the cementum and exposure of dentin in root. In group 5 some specimens resulted in a modification of normal tooth surface characteristics and in others there were no changes. Conclusions: The five composites polishing systems analyzed in this study resulted in enamel and cementum modification.

Palabras clave : Sistemas de pulido; Resina compuesta; Meb.