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Penetration of Filled and Unfilled Resin Sealants on Different Enamel Substrates
Kamila Rosamilia Kantovitz1, Kelly Maria Silva Moreira1, Fernanda Miori Pascon1
1Department Pediatric Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
Purpose:
To evaluate the penetration ratio of filled and unfilled resin-based sealants on different enamel substrates and pit and fissure morphologies.
Methods:
Forty-eight occlusal enamel blocks obtained from impacted human third molars were randomly divided (n equals eight) according to enamel substrates (sound; caries-like lesion; caries-like lesion plus topical fluoride application) and sealant material (FluroShield; Helioseal Clear Chroma). Sealants were applied on the enamel surface. The specimens were stored in 100 percent humidity for 24 hours at 37 degrees Celsius, sectioned in a buccal-lingual direction (at approximately 50 μm), and examined to determine the sealant penetration ratio (b x 100/a; a equals total fissure length and b equals sealant penetration length) and pit and fissure morphology (V-, U-, or Y-shaped). Statistical analysis was performed using Friedman and Kruskal-Wallis tests (P<0.05).
Results:
Enamel substrate and sealant material did not affect the sealant penetration ratio, with no interactions between these factors. Moreover, the morphology significantly affected the sealant penetration, with the "Y"-shaped fissures presenting the lowest sealant penetration ratio compared to "U-"shaped (P=0.0001) and "V-" shaped fissures (P=0.0018).
Conclusions:
Pit and fissure morphology was a critical factor on sealant's penetration capacity; however, enamel substrate and sealant type did not affect sealant's penetration ratio.
