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CC BY-NC-ND 4.0 · Eur J Dent 2015; 09(04): 558-563
DOI: 10.4103/1305-7456.172631
Original Article
Dental Investigation Society

Effects of sealant, viscosity, and bonding agents on microleakage of fissure sealants: An in vitro study

Maryam Mehrabkhani
1   Department of Pediatric Dentistry, Dental Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
,
Fatemeh Mazhari
2   Department of Pediatric Dentistry, Dental Material Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
,
Samaneh Sadeghi
3   Department of Orthodontic, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran
,
Masoumeh Ebrahimi
4   Department of Pediatric Dentistry, Oral and Maxillofacial Diseases Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
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Publikationsdatum:
23. September 2019 (online)

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ABSTRACT

Objective: The aim of this study was to evaluate the effects of enamel or dentin bonding agent (DBA) and sealant viscosity on sealant microleakage. Materials and Methods: Sixty extracted human premolars were randomly divided into two equal groups (based on sealant viscosity) and each group was divided into three subgroups of 10 teeth. Group 1 (low viscosity sealant, Seal-Rite, Pulpdent, USA with 7.7% filler): Prophylaxis, enameloplasty, etching of occlusal surfaces with 38% of phosphoric acid gel, rinsing and drying, followed by (1) enamel bonding agent (EBA) (Margin Bond, Coltène/Whaledent AG) or (2) DBA (Excite, Ivoclar Vivadent AG, Liechtenstein) or (3) no bonding (NB) prior to sealant application. In Group 2, similar procedures were performed except for applying a high viscosity sealant (Seal-Rite, Pulpdent, The USA with 34.4% filler). Specimens were thermocycled and then immersed in a 0.5% basic fuchsine solution for 24 h next, buccolingual slices of samples were scored under a stereomicroscope. The Kruskal–Wallis and Mann–Whitney U-tests were used for data analysis. Results: There was no significant difference between DBA, EBA, and NB subgroups in the microleakage scores in both groups. Low viscosity sealant had a lower microleakage than the high viscosity sealant in both DBA (P = 0.002) and NB (P = 0.041) subgroups. Conclusion: The results indicated that the use of low viscosity sealant reduced the microleakage of pit and fissure sealants. However, the use of a bonding agent before sealant placement didn't affect the microleakage.

Key words:

Dentin bonding agent - enamel bonding agent - microleakage - sealant viscosity
 

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