An in vitro comparative study of microshear bond strength of restorations for arrested dentine in primary teeth after silver diamine fluoride application using two composite resin systems
Objectives: Silver Diamine Fluoride (SDF) induced arrested lesions in primary teeth can appropriately be restored using composite resin with various adhesive systems. This study aimed to compare micro-shear bond strength of composite resin restorations using etch-and-rinse system (E&R; Adper Single Bond 2 Adhesive, 3M ESPE, St Paul, MN, USA) and self-etching (SE; Clearfil® S3 Bond Light-Cure, Kuraray Co, Ltd, Osaka, Japan) system on SDF-induced discolored dentine in primary molars. Methods: Dentine layer on occlusal table of 12 primary molars was mechanically exposed and the crowns were mesio-distally sectioned and separated into buccal and lingual paried portions. Sound dentine was applied with 38% SDF solution (Saforide, Toko Seiyaku Kasei Ltd., Japan). Specimens were stored in 100% relative humidity incubator at 37 oC for 7 days. Specimes with discoloration dentine were randomly assigned to, either E&R or SE group and flowable composite material was placed in Ø 2 millimeters block. The durability was challenged in 500 cycles of standard thermocycling (ISO TR11405). The microshear bond strength was evaluated and data was analysed using the paired t-test. Results: The mean microshear bond strength of SE group was higher than those of the E&R group, however the difference was not statistically significant. Conclusions: The tested adhesive systems had comparable bond strength when restoring the SDF-induced discoloration dentine of primary molars. Results from this study, in part, suggested that single-step application of SE system containing 10-MDP together with flowable composite restorative material could be used as a convenient alternative to restore the SDF-induced arrested dentine in primary teeth.
2017 Japanese Division Annual Meeting (Tokyo, Japan) 2017