Effect of chlorhexidine gluconate on porosity and compressive strength of a glass ionomer cement

INTRODUCTION: For presenting wide antibacterial activity, chlorhexidine (CHX) has been extensively used in dentistry and can be easily incorporated into the glass ionomer cement (GIC) and consequently released into the oral cavity. AIM: The aim of this study was porosity and compression strength of a GIC, that was added to different concentrations of CHX. MATERIAL AND METHOD: Specimens were prepared with GIC (Ketac Molar Esaymix) and divided into 4 groups according to the concentration of CHX: control, 0.5% and 1% and 2% (n = 10). For analysis of pores specimens were fractured with the aid of hammer and chisel surgical, so that the fracture was performed in the center of the specimens, dividing it in half and images were obtained from a scanning electron microscope (SEM) analyzed in Image J software. The compressive strength test was conducted in a mechanical testing machine (EMIC - Equipment and Testing Systems Ltd., Joseph of the Pines, PR, Brazil). Statistical analysis was performed by ANOVA, Tukey test. Significance level of 5%. RESULT: No statistically significant changes between the study groups was observed both for the number of pores as well as for the compressive strength. CONCLUSION: The use of GIC associated with CHX gluconate 1% and 2% is the best option to be used in dental practice.