Influence of rotary diamond and ultrasonic tips on bond strength of composite cingulum rest seats over dentin

Authors

  • Gustavo Salgado de Souza Universidade Federal do Pará
  • Welton Bohry de Souza Universidade Federal do Pará
  • Jose Luiz Rezende Bispo dos Santos Universidade Federal do Pará
  • Eliza Burlamaqui Klautau Universidade Federal do Pará
  • João Evandro da Silva Miranda Universidade Federal do Pará

Keywords:

Removable partial prosthesis, composite rest seat

Abstract

Purpose: To evaluate the influence of using either ultrasonic CVD (Chemical Vapor Deposition) or conventional rotary diamond tips on the adhesive strength of cingulum rest seats made of composite resin over bovine dentin. Methods: Twenty specimens were produced for each experimental group. For specimens in Group 1, the dentin was exposed with a rotary diamond tip; in Group 2 this procedure was performed using an ultrasonic CVD diamond tip. In both groups a two-step self-etching adhesive system was used, and the shape and size of the rest seats made of composite resin were standardized. The specimens were subjected to a shear assay using a universal testing machine at a crosshead speed of 0.5 mm/min. Data were analyzed by Student’s t-test at the significance level of 0.05. Results: There was a statistically significant difference (P= 0.028) between the means of the experimental groups: 24 kgf for Group 1 and 31. kgf for Group 2. Conclusion: Dental preparation with dentin exposure in the cingulum region by using ultrasonic CVD diamond tip showed the highest bond strength of self-etching adhesive system and composite rest seats for support of removable partial dentures.

Author Biographies

Gustavo Salgado de Souza, Universidade Federal do Pará

Especialista em Prótese Dentária pelo Centro de Ensino Superior do Pará (CESUPA) e Mestrando em Odontologia pela Faculdade de Odontologia da UFPA.

Welton Bohry de Souza, Universidade Federal do Pará

Graduação em odontologia pela Faculdade de Odontologia da Universidade Federal da UFPA.

Jose Luiz Rezende Bispo dos Santos, Universidade Federal do Pará

Especialista em Prótese Dentária pela FOB – USP; especialista em Implantodontia pela ABO-PA; professor do curso de especialização em Prótese Dentária pela ABO-PA e mestrando em odontologia pela UFPA.

Eliza Burlamaqui Klautau, Universidade Federal do Pará

Mestre em Prótese Dentária pela FOB-USP; doutora em Materiais Dentários pela FOB-USP; Professora Adjunto I da Graduação e Mestrado da UFPA.

João Evandro da Silva Miranda, Universidade Federal do Pará

Mestre e Doutor em Reabilitação Oral pela FOB – USP; Professor Adjunto IV da Graduação e mestrado da UFPA.

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Published

2011-04-08

Issue

Vol. 26 No. 2 (2011)

Section

Original Article

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