Elizabeta Gjorgievska¹,
J.W. Nicholson²,
Icko Gjorgovski³,
Snezana Iljovska¹ and
Marija Stevanovic¹

¹clinic for Pediatric and PreVentiVe dentistry, faculty of dental medicine, uniVersity “sts. Kiril and metodij” sKoPje, rePublic of macedonia;
² school of science, uniVersity of greenWich at medWay, Kent, uK;
³ faculty of natural and mathematic sciences, uniVersity “sts. Kiril and metodij” sKoPje, rePublic of MACEDoniA

Introduction: Microleakage can be defined as passage of bacteria, liquids, molecules or ions between the prepared tooth surface and the restorative material applied. As the ability of the material to be resistant to secondary caries and microleakage determines whether the restoration is successful or not, the purpose of this study was to determine and compare the microleakage between different types of dental restoratives, as well as between different types of teeth - deciduous and young permanent immature teeth. Material and methods: The evaluation was carried out by optical microscope connected to digital camera on restorations after different storage time intervals.
Results: The lowest dye penetration was noticed in Fuji IX, while the other materials did not show statistically significant difference. In addition, all the materials had better occlusal than cervical margins. The comparison of the samples in regard to time intervals showed that the conditioned samples have excellent resistance to microleakage, while in unconditioned samples, this percentage was lower (75%). No significant differences were found between the primary and young permanent immature teeth.
Conclusions: Fuji IX showed the lowest microleakage. Dyract AP and Unifil Flow had high level of microleakage, especially in the cervical area. No differences were found between different types of teeth.

Key words: fluoride, glass- ionomer cement, composite, microleakage