بررسي حلاليت چهار نوع سمان مورد استفاده در ترميم هاي ريختگي ثابت

Comparison of solubility of four type of cements used in fixed restorations

Introduction: Zinc phosphate and poly carboxylate cement have wide usage in operative and pedodontics dentistry and fixed prosthodontics. Ariadent zinc phosphate and poly carboxylate cements are manufactured in Iran. One of the important and necessary properties of each cement to be used in oral cavity, is its low solubility. The purpose of the present study was to determine and compare solubility of Harvard zinc phosphate and poly carboxylate cement with Ariadent. Methods and materials: In this experimental study that was based on specification No 2725 and 2726 of Iranian standard, ten disc shaped samples with 1 ±0.03 mm width and 10 ± 0.3 mm diameter was constructed for each cement. Zinc phosphate solubility with spectrophotometer and poly carboxylate solubility with conductivity evaluation was measured. The data were analyzed with T test. P value < 0.05 considered as significant. Results: The mean value of solubility for Harvard and Ariadent zinc phosphate cement was 1.23 ± 0.24 and 0.86 ± 0.15 mgr P2O5 per gr. respectively. There was statistically significant difference between the two cements (p value = 0.001). The mean value of solubility for Harvard and Ariadent poly carboxylate cement was 39.27 ± 4.40 and 37.85 ± 3.05 simence on the meter per kg. respectively. There was statistically no significant difference between the two cements (p value = 0.4). Discussion: In accordance to determined values from Iranian standard No 2725 and 2726, the mean value of solubility of 4 experimental cements in this study were within standard limits.