Calcium ion release from four different light-cured calcium hydroxide cements

Introduction: The aim of this study was to compare calcium (Ca) ion-releasing capacity of four different light-cured calcium hydroxide [Ca(OH) 2 ] cements with self-cured Ca(OH) 2 cement. Materials and Methods: Five different brands of Ca(OH) 2 cements were taken and they were grouped into five groups which are as follows: Group I - Dycal (control group), Group II - Septocal, Group III – TheraCal, Group IV - Cal LC, and Group V - Hydrocal. All specimens ( n = 50) were prepared by mixing and curing the cements as per manufacturer's instructions. Each sample was placed on the bottom of a 4 cm high test tube in 10 ml deionized water at 37°C. This stored water was collected for Ca analysis and replaced after 7, 14, and 21 days. In this manner, ion release was measured after 7, 14, and 21 days by inductively coupled plasma-optical emission spectroscopy test. Results: Ca ion release from all groups at various time durations was measured and mean was calculated along with the standard deviation. These values were compared using two-way ANOVA and Tukey's post hoc test which showed highly significant result with P Conclusions: Within the limitations of this study, light-cured Ca(OH) 2 cements released high amount of Ca ions compared to self-cured Ca(OH) 2 cements. Group V (Hydrocal) and Group III (TheraCal) were found to be the highest light-cured Ca ion releasing materials.