[Effect of based-resin desensitizing agent and self-etching adhesive resin on marginal leakage of class II amalgam restorations]

ABSTRACT

The purpose of this study was to compare marginal leakage of class II amalgam restorations lined with a resin- based desensitizing agent and a self-etching adhesive system with copal varnish. Fifty six freshly extracted human premolar teeth were divided into four groups. Class II box only cavity preparation was prepared on mesial and distal surfaces of each tooth. While the cavities in two groups were lined with desensitizing agent; Viva Sens [A] and adhesive system; Clear Fil S[3] Bond [B],one group was treated with copal varnish; Copalite [C], and last group was used as control, without any lining [D]. Spherical high copper amalgam [Oralloy] was hand-condensed into each preparation, specimens were thermocycled, stained and sectioned. Microleakage was graded using a stereomicroscope. Microleakage scores were calculated and analyzed. Kruskal-Wallis and Mann-Witheny tests were used for analysis of data [alpha=0.05]. For the leakage values of groups A and B, T-test revealed less microleakage with Viva Sens [P<0.05]. Kruskal-wallis test showed significant difference in four groups [P<0.05]. Clear Fil S[3] Bond showed less microleakage than control group, but leakage in copal varnish and Clear Fil S[3] Bond was similar. Less microleakage was revealed with Viva Sens when compared with the other groups [P<0.05]. Viva Sens reduced microleakage of Class II high copper amalgam restorations significantly more than the Clear Fil S[3] Bond and copal varnish