Microtensile Bond Strength of Translucent Glass Fiber Posts to Intra-radicular Dentin

• Main Authors: N. Mohammadi, M. Abed Kahnamoui, ME. Ebrahimi Chaharom, S. Kimyai, M. Bahari
• Format: Article
• Language: English
• Published: Tehran University of Medical Sciences 2009-03-01
• Series: Journal of Dentistry of Tehran University of Medical Sciences
• Subjects: Tensile Strength; Lightpost; Curing Lights; Dental
• Online Access: http://journals.tums.ac.ir/upload_files/pdf/13516.pdf

Objective: The aim of the present study was to compare microtensile bond strengths (μTBS) of glass fiber posts to different parts of intra-radicular dentin using conventional method and one-shot technique under different light intensities.Materials and Methods: Twenty-eight single-rooted teeth were prepared to receive fiber posts: Group 1: Conventional method at light intensity of 600 mW/cm2; Groups 2, 3 and 4:One-shot technique at light intensities of 600, 800 and 1000 mW/cm2 respectively. Dumbbell-shaped slices were obtained from the samples and submitted to micro-tensile testing.The data were analyzed using two-way ANOVA and paired-samples t-test.Results: There were no significant differences in μTBS values of the cervical and middle thirds between the groups (P>0.05). μTBS values in the cervical thirds in groups 2 and 3 were significantly higher than those in the middle thirds (P>0.05). However, there were nosuch differences in groups 1 and 4 (P>0.05).Conclusion: It is proper to simultaneously cure the resin cement and the adhesive agent (one-shot technique); however, in that case, high light intensities (1000 mW/cm2) are recommended to achieve identical bond strength values in the cervical and middle thirds.