Effects of Chitosan on Micro-Shear Bond Strength of Self-Adhesive Cements

Shahin  Kasraei; Elahe  Mostajir; Niusha  Golbari; Sogol  Nejadkarimi; Parmis  Kasraei; Gelareh  Tajziehchi

doi:10.18502/jimc.v8i4.19550

Shahin Kasraei Restorative Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Elahe Mostajir Restorative Department, School of Dentistry, Arak University of Medical Sciences, Arak, Iran
Niusha Golbari Restorative Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Sogol Nejadkarimi Restorative Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Parmis Kasraei School of Dental Medicine, Bahçeşehir University, Istanbul, Turkey
Gelareh Tajziehchi Restorative Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran

DOI: https://doi.org/10.18502/jimc.v8i4.19550

Keywords: Adhesive cement, Chitosan, Dentin, Resin cements

Abstract

Background: The long-term success of bonding of self-adhesive cement to the tooth is questionable. Different conditioning methods were suggested to improve the bonding durability of these cements. This study aimed to investigate the effect of 1% chitosan solution on micro-shear bond strength of self-adhesive resin cements to dentin.

Methods: 28 human sound premolar teeth were divided into 4 groups. The occlusal surfaces of the teeth were ground to expose the dentine surface. In control groups, BF (Bifix) and EB (Embrace) dual-cure self-adhesive cements were applied to the dentin surface using a microtube and were light cured. In the EB+Ch and BF+Ch test groups, dentin surfaces were conditioned with 1% chitosan solution before using resin cements. The specimens were thermocycled for 2000 times between 5-55°C and their bond strength was measured by a mechanical testing machine at strain rate of 0.5 mm. Failure modes were determined using a stereo-microscope at 40X magnification. Data were analyzed using Two-Way ANOVA and Tukey’s tests (α=0.05).

Results: The results have revealed maximum bond strength in the EB+Ch test group (13.73±0.42 Mpa) and the minimum strength in the BF control group (8.01±0.42 Mpa). Data analysis showed the maximum bond strength in groups where dentin had been pretreated with chitosan solution (p<0.001). The failure mode was mainly adhesive type in all groups.

Conclusion: Dentin surface treated with 1% chitosan solution prior to application of self-adhesive cements increases the cement-dentin bond strength.