Purpose: To evaluate the micro-shear bond strength of newly developed all-in-one adhesive system, TMX-200 primer, to intact enamel. Materials and method: The labial surfaces of extracted human incisors were used in this study. The teeth were divided into three groups and treated as follows: Group1: TMX-200 primer (Kuraray Medical Co.) for 20 s. Group2: two-step self-etching primer system, Clearfil SE Bond (Kuraray Medical Co.). Group3: K-etchant (Kuraray Medical Co.) for 60s followed by bonding resin of Clearfil SE Bond. Small cylinders of flowable composites (Metafil Flo, Sun Medical or SI-BF2001-HF, SHOFU) were then bonded to the treated surfaces and subjected to the micro-shear test at a crosshead speed of 1 mm/min. Data were analyzed using two-way ANOVA and Fisher's PLSD test. Table presented mean bond strength±SD (MPa, n=10). Data with the same superscript letters presented no statistical significant difference (p>0.05).

 

 

 

 

Results: Bond strengths obtained for both flowable composites presented no significant differences. For SI-BF2001-HF, no significant differences in bond strengths were found among the surface treatments. Whereas, for Metafil Flo, surface treated by TMX-200 primer presented significant lower bond strength than other treatment. Conclusion: The results suggested that the bond strength of TMX-200 was slightly lower than that of the two-step self-etching primer system or the phosphoric acid etching. Supported by the grant for COE Program, FRMDRTB at TMDU.