The purpose of this study was toevaluate the effect of thermocycling on the tensile bond strength and marginal leakage of composite bond to dentin surface.
Four kinds of dentin conditioner and adhesives including Superbond D-Liner, All-Bond 2, Prisma Universal Bond 3, and Clearfil Photobond were used for this study, Thermocycling consisted of 500 cycles, 15 seconds dwell time each in 5℃ and 55℃
bath.
Tensile bond strength was measured using an Instron testing machine with a crosshead speed of 1 mm/min, marginal leakage was evaluated using an image analyzer, and applicated dentin surface was observed by SEM.
@ES The results obtained were summerized as follows;
@EN 1.Tensile bond strength was 6.64±2.32 Mpa at Superbond D-Liner group, 6.35±1.56 Mpa at All-Bond 2 group, 4.75±0.95 Mpa at Prisma Universal Bond 3 group and 4.66±1.89 Mpa at Clearfil Photobond group. Superbond D-Liner group and All-Bond 2
group
were larger than Clearfil Photobond group(P<0.05).
2. After thermocycling, tensile bond strength showed significant difference between All-Bond 2 group and the others, Superbond D-Liner group and clearfil photobond group(P<0.05).
3. Marginal leakage after thermocycling of Superbond D-Liner group and All-Bond 2 group were less than Prisma Universal Bond 3 group and Clearfil Photobond group (P<0.05).
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