Shear strength of sealants placed with non-rinse conditioning compared to a conventional acid etch-rinse technique (original) (raw)

ASDC journal of dentistry for children

Abstract

The present study compared the shearing strength of a non-rinse conditioning (NRC) compomer sealant to that of a conventional sealant. Thirty molars and premolars were sectioned longitudinally. The resulting halves were divided into 4 groups. Cylinders of sealants were bonded to the sections using a gelatin capsule as a matrix, as follows: Group A (n = 15) NRC + Prime & Bond + Dyract Seal; Group B (n = 15) same as group A but with phosphoric acid and rinse; Group C (n = 15) conventional phosphoric acid + Helioseal; Group D (n = 15) NRC + Helioseal. After immersing the specimens in water for 7 days, the samples were mounted on the Instron testing machine at a 20 mm/min crosshead speed. The results were subjected to ANOVA with Scheffe test, with a significant level of .05. No shearing strength values could be obtained for the specimens of group D. Some cylinders separated from the enamel while still immersed in the water, and in others the adhesion was too low, and no readings could b...

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