EVALUATION OF SURFACE ROUGHNESS AND MARGINAL MICROLEAKAGE OF ZIRCONIA REINFORCED GLASS IONOMER VERSUS RESIN MODIFIED GLASS IONOMER IN CLASS V RESTORATION IN PRIMARY MOLARS (IN VITRO STUDY)

Document Type : Original Article

Authors

1 Pediatric dentistry,Faculty of dentistry,Cairo University,Cairo,Egypt

2 Pediatric department, Faculty of Dentistry, Cairo university, Cairo, Egypt

3 pediatric dentistry, Faculty of dentistry, Cairo University, Cairo, Egypt

10.21608/adjc.2025.344730.1682

Abstract

Abstract
Aim: To evaluate surface roughness and marginal microleakage of Zirconia Reinforced Glass Ionomer (Zirconomer) versus Resin modified Glass Ionomer (Riva Light Cure) in restoring class V cavities in primary molars.
Methodology: Thirty-eight primary molars were divided into two groups, group 1 for Zirconomer and group 2 for Riva LC. Class V cavities were prepared on all molars and restored with their assigned restorative material. For microleakage evaluation, teeth were subjected to thermocycling, immersed in methylene blue dye and sectioned buccolingually. Assessment of the degree of dye penetration was done under stereomicroscope. For surface roughness, molars were subjected to toothbrushing using an automated brushing simulator, a before and after surface roughness measurements were recorded using atomic force microscope. An Independent t test was performed for surface roughness and Chi square test for microleakage evaluation.
Result: Zirconomer showed lower surface roughness values before and after simulated toothbrushing than Riva LC. Both materials showed microleakage with a higher mean score for Zirconomer group than Riva LC group.
Conclusion: within the limitation of the study, Zirconomer showed lower surface roughness values than Riva LC, but higher microleakage values.

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