Degree of conversion of two self-adhesive resin luting cements through different lengths of fiber post

Purpose To evaluate the degree of conversion (DoC) self-adhesive resin luting cements when irradiated through different fiber post lengths. Methods A total 60 teeth were sectioned to achieve lengths 4 mm, 7 and 10 while posts trimmed give 3 6 9 mm Post space was created accommodate 1 cement apically. Two (Multilink Speed RelyX U200) used. four cycles 20 s irradiation done with an attenuated reflectance Fourier transform infrared spectroscopy reading between each cycle. Results The mean ± standard deviation DoC achieved a light-emitting diode quartz tungsten halogen for Multilink 67.4 2.7% 72.4 4.0%, respectively, U200, corresponding values 56.5 62.0 3.8%, respectively. For Speed, there no significant difference control group, found groups. All other groups showed differences. Conclusion reduced as length increased.