Light Conduction Capability of Different Light-Transmitting FRC Posts
سال انتشار: 1391
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 427
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شناسه ملی سند علمی:
JR_JDMT-1-2_001
تاریخ نمایه سازی: 20 مهر 1398
چکیده مقاله:
Introduction: Application of light transmitting posts to restore greatly damaged endodontically treated teeth has been increased. It is suspected that light intensity decreases as it passes throughout different materials. This can reduce the degree of conversion required for adequate bond strength throughout the length of these posts. The objective of this study was to evaluate the amount of light intensity reduction after passing through different depths of FRC posts. Methods: Four groups of five extracted human central incisors were prepared to cement four types of FRC posts with Panavia F 2 resin cement. The apical end of the posts were exposed by sectioning with a diamond disk and then polished. The light intensity measurement was performed using a micro-voltmeter in 8 points or depths with 2mm intervals beginning from the apical depth of 16mm up to a coronal depth of 6mm. Two different output light intensities [HIP (High Intensity Program) and LOP (Low Intensity Program)] were evaluated. Results: Statistical analysis showed significant differences in light intensity at various depths between 6 and 16mm in all groups. These reductions were linear in all specimens; however, the rate of reduction was dissimilar among different FRC posts. HIP and LOP light exposure modes had not the same rate of light reduction. Conclusion: Light intensity decreased dramatically after passing through different depths of FRC posts. None of the posts had sufficient enough light transmission for satisfactory polymerization at the apical and middle levels.
کلیدواژه ها:
نویسندگان
Saied Mostafa Moazzami
Department of Operative and Esthetic Dentistry, Dental Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Reza Kazemi
Department of Reconstructive Sciences, University of Connecticut Health Center, School of Dental Medicine, Farmington, USA
Maliheh Alami
Department of Operative and Esthetic Dentistry, Dental Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Ebrahim Attaran
Department of Physics, Ferdowsi University of Mashhad, Mashhad, Iran
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