Effect of the enamel conditioners on initial shear bond strength of resin-modified glass ionomer adhesive to enamel

Authors

Nattaporn Laotaveerungrueng
Paiboon Techalertpaisarn

Publication Date

2015-09-01

Abstract

Objective To study the effect of different enamel conditioners on initial shear bond strength of resinmodified glass ionomer adhesive to enamel. Materials and methods Fifty five human premolars were divided into 5 groups (11 samples for each group). Group 1, 2, 3 and 4 (Experimental groups) were conditioned with no conditioner, 20% polyacrylic acid, 37% phosphoric acid and self-etching primer, respectively and the brackets bonded with resinmodified glass ionomer adhesive (Fuji ortho LC). Group 5 (Control group) was conditioned with 37% phosphoric acid and the brackets bonded with composite resin adhesive (Transbond XT). After light activation for 5 minutes, shear bond strengths of 10 specimens from each group were tested by universal testing machine. One remaining specimen from each group was used to investigate of resin penetration pattern into enamel under scanning electron microscope. The mean of shear bond strength among groups were compared by one-way ANOVA. The adhesive remnant indices (ARI) in each group were measured and tested by the Chi-square at 95% confidence interval. Results Mean of shear bond strengths and standard deviations of test groups 1, 2, 3, 4 and 5 were 8.4 ± 2.0, 10.8 ± 0.7, 14.6 ± 3.0, 13.7 ± 1.7 and 21.5 ± 4.0 megapascal, respectively. There is no significant difference between group 3 and 4 (p = 0.433). Types of enamel conditioners were statistically significant to ARI scores (p < 0.05). SEM image revealed that the size and number of resin tags in self-etching primer group are greater than other experimental groups. Conclusion The use of phosphoric acid or self-etching primer as a conditioner before bonding with resin-modified glass ionomer adhesive can increase initial shear bond strength.

DOI

10.58837/CHULA.CUDJ.38.3.3

First Page

197

Last Page

208

Recommended Citation

Laotaveerungrueng, Nattaporn and Techalertpaisarn, Paiboon (2015) "Effect of the enamel conditioners on initial shear bond strength of resin-modified glass ionomer adhesive to enamel," Chulalongkorn University Dental Journal: Vol. 38: Iss. 3, Article 3.
DOI: 10.58837/CHULA.CUDJ.38.3.3
Available at: https://digital.car.chula.ac.th/cudj/vol38/iss3/3