%0 Journal Article
%T Micromorphology of Restorative System-Dentin Interface in Primary Teeth Using Different Adhesive Systems and Burs
%A Tereza Cristina Favieri de MELO-SILVA
%A Silvio Issao MYAKI
%A Claudio Luis de MELO-SILVA
%A Victor Elias ARANA-CHAVEZ
%J Pesquisa Brasileira em Odontopediatria e Cl¨ªnica Integrada
%D 2007
%I Associa??o de Apoio ¨¤ Pesquisa em Sa¨²de Bucal (APESB)
%X Objective: This study in vitro evaluated the micromorphology of the resin-dentin interface in primary teeth, using different rotatory instruments and adhesive systems. Method: Twenty primary molars were selected and randomly divided into two groups (n=10). In group C, the occlusal surfaces of teeth were cut with a carbide bur at high-speed until the area of dentin exposure. In group D, the same procedure was conducted, but the dentin was cut with a diamond bur. The surface of each tooth was divided into two halves; one half of the occlusal surface received application of two-step total-etch adhesive system (Single-Bond ¨C 3M), and the other half received application of one-step self-etching adhesive (One Up Bond F - Tokuyama). All teeth were restored with composite (Z-250 - 3M). The samples were thermocycled, embedded in acrylic resin, sectioned for achievement of the resin-dentin interface and the teeth were sputter- coated with gold and observed under SEM. Results: the two adhesive systems showed hybrid layer formation; the two-step adhesive system demonstrated better interface sealing than the self-etching; the dentin cut with carbide burs was not statistically different with regard to the adhesive system; and diamond bur with self-etching adhesive system showed the worst interface sealing with the highest gap values. Conclusion: the diamond bur presented negative influence only in the quality of the interface between restorative system and primary dentin when it was used the one step self-etching adhesive system.
%K Dental instruments
%K Adhesive system
%K Deciduous tooth
%U http://www.uepb.edu.br/eduep/pboci/pdf/Artigo1v71.pdf