Effect of phosphoric acid on microtensile bond strength between dimethacrylate-based fiber post and resin composite core material

Authors

Sariya Saoraya
Wacharasak Tumrasvin
Siriporn Arunpraditkul

Publication Date

2015-05-01

Abstract

Objective To evaluate microtensile bond strength between dimethacrylate-based fiber post and resin composite core material after post surface treatment with phosphoric acid followed by silane and/or bonding agent. Materials and methods Thirty FRC Postec Plus® were divided into 6 groups by application of post surface with group 1 silane, group 2 bonding agent, group 3 silane and bonding agent. Group 4-6: post surface were etched with 37% phosphoric acid for 1 minute and followed by application of silane (group 4), bonding agent (group 5), and silane and bonding agent (group 6). The surface-treated post was placed at the center of a cylindrical plastic matrix. Multicore® Flow was injected into the matrix band and light-activated. The post-core units were cut into twenty stick-shaped specimens per group for microtensile bond strength test. Modes of failure were classified by stereomicroscope (40x). Data were analyzed with two-way analysis of variances and Dunnettûs T3 at a significance level 0.05 (p < 0.05). Results Post surface treatment with phosphoric acid followed by silane and bonding agent showed the significantly highest microtensile bond strength. Whereas silanization without phosphoric acid etching showed the significantly lowest microtensile bond strength and adhesive failure. The most of specimens in other groups demonstrated cohesive failure in fiber posts. Conclusion Post surface treatment with 37% phosphoric acid for 1 minute followed by silane and/or bonding agent can increase microtensile bond strength between dimethacrylate-based fiber post and resin composite core material.

DOI

10.58837/CHULA.CUDJ.38.2.6

First Page

155

Last Page

164

Recommended Citation

Saoraya, Sariya; Tumrasvin, Wacharasak; and Arunpraditkul, Siriporn (2015) "Effect of phosphoric acid on microtensile bond strength between dimethacrylate-based fiber post and resin composite core material," Chulalongkorn University Dental Journal: Vol. 38: Iss. 2, Article 6.
DOI: 10.58837/CHULA.CUDJ.38.2.6
Available at: https://digital.car.chula.ac.th/cudj/vol38/iss2/6