Effect of cyclic compressive loading on the bond strength of an adhesive system to dentin after collagen removal
Nenhuma Miniatura disponível
Data
2005-07-25
Autores
Santos, Paulo Henrique dos [UNESP]
Sinhoreti, Mário Alexandre Coelho
Consani, Simonides
Sobrinho, Lourenço Correr
Adabo, Gelson Luis [UNESP]
Vaz, Luis Geraldo [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Purpose: The objective of this study was to verify the effect of cyclic compressive loading on the shear bond strength of an adhesive system following collagen removal. Materials and Methods: Sixty bovine teeth were divided into 4 groups based on the adhesive procedure used: groups 1 and 2 - etching with 35% phosphoric acid and application of the Single Bond adhesive system; groups 3 and 4 - after etching, a 10% sodium hypochlorite solution was applied for 1 min before the application of the adhesive. In all the specimens, a Z100 resin cylinder was built up over the bond area. Groups 2 and 4 were submitted to 500,000 cycles with a load of 100 N. Results: The mean values for the shear bond test (MPa) were: group 1: 7.37 ± 1.15; group 2: 5.72 ± 1.66; group 3: 5.95 ± 1.21; group 4: 3.66 ± 1.12. There was no difference between groups 1 and 2 (p > 0.01). Between groups 1 and 3, 2 and 4, and 3 and 4 there was a significant difference (p < 0.01). The majority of the specimens demonstrated an adhesive failure. Conclusion: The application of sodium hypochlorite on dentin decreased the values of shear bond strength, as did the load cycling in the group treated with sodium hypochlorite.
Descrição
Palavras-chave
Adhesive system, Bond strength, Collagen removal, Sodium hypochlorite, bisphenol A bis(2 hydroxypropyl) ether dimethacrylate, collagen, dentin bonding agent, hypochlorite sodium, oxidizing agent, phosphoric acid, resin, silicon dioxide, single bond, Z100 composite resin, zirconium, animal, cattle, chemistry, dental acid etching, dental bonding, dentin, mechanical stress, shear strength, ultrastructure, Acid Etching, Dental, Bisphenol A-Glycidyl Methacrylate, Phosphoric Acids, Shear Strength, Silicon Dioxide, Sodium Hypochlorite, Stress, Mechanical, Zirconium
Como citar
Journal of Adhesive Dentistry, v. 7, n. 2, p. 127-131, 2005.