Bond strength of 4 sealants using conventional etch and a self-etching primer

The purpose of this study was to determine and compare the shear bond strength of 4 fissure sealant systems (Dyract Seal, Concise, Visio-Seal, Helioseal) to enamel using conventional etch and self-etching primer (Prompt-L-Pop).

Fifty-six newly extracted noncarious first permanent molars were used and embedded in a Teflon mold (3-mm height, 3-mm internal diameter). Mesial surfaces were exposed to a flattened area of enamel and then dried and washed. The teeth were divided into 8 groups, each consisting of 7 specimens stored in 37 degrees C distilled water for 24 hours. Then specimens were tested in a shear mode (Instron) at a crosshead speed of 0.5 mm/minute. The mean and standard deviations were subjected to an analysis of variance.

The average bond strengths using Prompt-L-Pop were: (1) Dyract Seal=20.61 MPa; (2) Concise=23.42 MPa; (3) Visio-Seal=2.94 MPa; and (4) Helioseal=11.83 MPa. These values were higher than and statistically different from those of Dyract Seal (10.18 MPa) and Concise (9.17 MPa) when the conventional etch system was used (student t test, P<.001).

The bond strengths of Prompt-L-Pop, in conjunction with Dyract Seal and Concise fissure sealant materials, exceeded those of conventional etch.