COMPARISON OF MICROLEAKAGE BETWEEN NANOHYDROXYAPATITE INCORPORATION INTO RESIN-BASED SEALANT AND CONVENTIONAL RESIN-BASED SEALANTS: A PILOT STUDY

Abstract

The aim of this study was to evaluate the microleakage of a nanohydroxyapatite-containing resin-based sealant compared with two conventional resin-based sealants. Fifteen extracted maxillary premolars were randomly assigned to three groups (n = 5 each): Group 1, resin-based sealant containing nanohydroxyapatite (nHA); Group 2, resin-based sealant containing fluoride (CP); and Group 3, resin-based sealant without remineralizing agent (EC). After sealant on occlusal surface, all specimens underwent thermocycling between 5 °C and 55 °C for 5,000 cycles, then were immersed in 5% methylene blue solution at 37 °C for 24 hours. Each tooth was sectioned buccolingually into two 1 mm-thick slices, and microleakage was assessed under a stereomicroscope. The result showed that Group 3 (EC) exhibited the greatest microleakage, followed by Group 1 (nHA), whereas Group 2 (CP) showed the least. These differences were not statistically significant (p = 0.823).

Keywords: Microleakage, Resin-Based Sealant, Nanohydroxyapatite, Fluoride, Remineralizing Agent