بررسي مقايسه اي تاثير حذف پوسيدگي به روش شيميايي- مكانيكي بر ريزنشت ترميم هاي كامپوگلاس مولرهاي شيري در آزمايشگاه

Comparison of the effect of chemo-mechanical and mechanical caries removal on microleakage of compoglass restorations in primary molars (An invitro study)

Background & Aim: The aim of this study was to determine the effect of chemo-mechanical caries removal on microleakage of compoglass restorations in primary molars. Methods & Materials: In this experimental study 70 primary molar teeth with proximal caries were selected and divided into two groups. In one group the caries were removed with round bur and in the other group with carisolv gel. Samples were restored with compoglass restoration material, then thermocycled. The surfaces of teeth were sealed with two coats of nail varnish 1-2 mm short of the margins and were immersed in basic Fushin solution for 24 hours at 37° C and sectioned mesiodistally. The extent of dye penetration was evaluated with Olympus stereomicroscope at 40x. The data were analyzed quantitatively (Chi square and proportions statistic test) and quantitatively (T test). Results: Qualitative test showed that, dye penetration in gingival and axial walls in chemomechanical group is significantly lower than mechanical group. Quantitative T test also showed that dye penetration length in gingival and axial walls in chemomechanical method is lower, and their difference is significant. Conclusion: The extent of microleakage in compoglass restorations after caries removal with chemo-mechanical method is lower than with mechanical method; therefore, it can be replaced by conventional method, if necessary