مجله دانشکده دندانپزشکی اصفهان (Jan 2009)
Comparison of solubility of four type of cements used in fixed restorations
Abstract
Introduction: Zinc phosphate and poly carboxilate cement have wide usage in operative,pedodontics dentistry and fixed prosthodontics. Ariadent zinc phosphate and poly carboxilatecements are manufactured in Iran. One of the important and necessary properties of each cement tobe used in oral cavity, is its low solubility. The purpose of the present study was to determine andcompare solubility of Harvard zinc phosphate and poly carboxilate cement with Ariadent.Methods and materials: In this experimental study that was based on specification No 2725 and2726 of Iranian standard, ten disc shaped samples with 1 ± 0.03 mm width and 10 ± 0.3 mmdiameter was constructed for each cement. Zinc phosphate solubility with spectrophotometer andpoly carboxilate solubility with conductivity evaluation was measured. The data were analyzed withT 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 P205 per gr. respectively. There was statistically significant differencebetween the two cements (p value = 0.001). The mean value of solubility for Harvard and Ariadentpoly carboxilate 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, themean value of solubility of 4 experimental cements in this study were within standard limits.Key Words: Zinc phosphate cement, Poly carboxilate cement, Solubility
