Abstract: Objective To verify the influence of different light intensities on the bond strength of fiber posts cemented with dual-cured resin cement.Methods 30 crownless human premolars were prepared.Fiber posts were inserted using dual-cured cement and were randomly divided into 3 groups(n=10):control group:no use of curing light source; low intensity group:the use of 600 MW/cm2 LED curing light intensity; high strength group:the use of 　　1 200 MW/cm2 LED curing light intensity.After one week,each root was sectioned transversally into three slices (cervical,middle and apical) and the bond strength of each section was determined using a push-out bond strength test.Results The bond strength:blank groupmiddle>apical.Conclusions When using a dual-cured cement,the bond strength of fiber post was influenced by the strength of curing light intensity.With the increase of curing light source intensity,the bond strength of fiber post also increased.

Key words: fiber post, resin cement, curing light source intensity, bond strength