Pinnacle Medicine & Medical Sciences

(ISSN: 2360-9516)

March 2015, Vol. 2 (3).

© Author(s) 2015. This work is distributed under the Creative Commons Attribution 3.0 License.

Research Article

 

Effect Of Prior Use Of Desensitizing Agents On Bond Strength Of Adhesive Systems To Human Dentin

Armando Brito Chermont1*, Alessandra Pereira de Andrade2, Angela Mauymi Shimaoka3 & Rubens Corte Real de Carvalho4

1*Prof. Da Faculdade de Odontologia da Universidade Federal do Pará,
Doutorando pela Faculdade de Odontologia da Universidade de São Paulo,
Brazil.

2,3Pós Doutoranda em Odontologia pela Universidade de São Paulo,
Brazil.

4Prof. Titular da Faculdade de Odontologia da Universidade de São Paulo,
Brazil.

Accepted 16 March, 2015; Available Online 19 March, 2015.

Abstract:

The aim of this study was to evaluate the effect of desensitizing agents on the bond strength of different adhesive systems condition and rinse and self-etching to dentin through microshear. Sixty dentin fragments were used, obtained from the buccal and lingual surfaces of molars third molars, which were distributed in groups (n = 12) according to desensitizing treatment (control - no treatment; potassium oxalate; + CPP-ACP fluorine; arginine; nano-hydroxyapatite) and adhesive system employ (Single Bond Adpter 2 / 3M; Clearfil SE Bond / Curaray). The applications of desensitizing agents (2 ml) were performed in three sessions with an interval of 48 hours. The dentin fragments remained immersed in 6 ml of artificial saliva in the period between applications. The adhesive systems were applied according to the instructions of the manufacturer and cured for 40 seconds. About every two dentin surfaces were fabricated in composite cylinders. The mechanical test was performed using a microshear speed of 1 mm / min .The fracture patterns were determined using a digital microscope with increased 50 times. Fractures were classified as adhesive, cohesive in dentin and composite resin cohesive described percentage. Data were compared by 2-way ANOVA and the Bonferroni test (p <0.05).
It was concluded that the desensitizing treatments influenced the bond strength of adhesive systems and conditional wash; treatment with potassium oxalate and arginine reduced the bond strength of self-etching; treatment with CPP-ACP did not interfere with hydroxyapatite and adhesion of self-etching.





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