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:: Volume 30, Number 4 (Winter 2013) ::
J Dent Sch GYEAR__, 30(4): 210-215 Back to browse issues page
Comparison of the Degree of Conversion of Two Resin Cements When using a Fiber Post
Dr. Somayyeh Kameli, Corresponding Author: Dr. Zohreh Moradi *, Dr. Mohammad Ataei, Dr. Maryam Ghavam, Dr. Mohammad Javad Kharazifard
Postgraduate student Dept. of Operative Dentistry , zo.moradi@shahed.ac.ir
Abstract:   (2697 Views)

Objective: Tooth-colored non-metal posts are adhered to the canal walls with the use of resin cements and dentin adhesives. Degree of conversion of these cements is especially important to ensure the durability of the restoration. The present study aimed at evaluating the degree of conversion (DC%) of self-cure and dual-cure resin cements at different depths and time points when using a DT. Light Post. Methods: In this experimental study, metal molds with 5 and 10 mm heights and internal diameter of 0.8 mm were used. Posts were vertically placed in the center of molds. Spectrum of absorption of the dual cure cement was measured before curing using Fourier transform infrared spectroscopy device. The uncured samples were then removed from the device and placed beneath the molds. After light irradiation, samples were transferred again to the FTIR device and their spectrum of absorption was measured. DC% was calculated using the relevant formula. For self-cure cements, spectrum of absorption was measured at 0, 2, 5, 10 and 15 minutes by the FTIR. Results were statistically analyzed using SPSS software.

Results: Self-cure cement had a DC of 5% at 0, 2, 5 and 10 minutes and a DC of 20% at 15 minutes. DC of the dual-cure cement was 44%, 15% and 8% at 0, 5 and 10 mm depths, respectively. Two-way ANOVA and Tukey’s Post Hoc test (HSD) revealed that in the dual-cure cement the DC at 5 and 10 mm depths was significantly different (P<0.05). DC was 20% at 15 minutes which was the highest.

Conclusion: DC% of the dual-cure cement was higher than that of the self-cure cement which is attributed to the optimal characteristics of the dual-cure cement and also the ability of fiber post to pass light.

Keywords: Self-cure resin cement, Dual-cure resin cement, DT Light Post, DC%
Full-Text [PDF 211 kb]   (1248 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2013/02/27
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Kameli S, Moradi Z, Ataei M, Ghavam M, Kharazifard M J. Comparison of the Degree of Conversion of Two Resin Cements When using a Fiber Post. J Dent Sch. 2013; 30 (4) :210-215
URL: http://jds.sbmu.ac.ir/article-1-1078-en.html
Volume 30, Number 4 (Winter 2013) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی Shahid Beheshti University Dental Journal
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