Degree of Conversion of Metacrylate-and Silorane-based Dental Composites at Various Depths and Using Different Matrix Bands

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BAREKATAIN MEHRDAD; MOUSAVINASAB SEYED MOSTAFA; Azarbaijani Saeid; RANJBARAN FATEMEH SADAT; Zadeh Dadashi Masoud

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Journal: Journal of Mashhad Dental School Year:2018 | Volume:42 | Issue:2 Page(s): 133-140

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Title

Degree of Conversion of Metacrylate-and Silorane-based Dental Composites at Various Depths and Using Different Matrix Bands

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Resin compositesQ2

Matrix stripQ1

Restorative dentistryQ2

Abstract

Introduction: To improve the quality of tooth-colored restorations, various equipment and materials are being used. In this study, we sought to determine the degree of conversion of metacrylate-and silorane-based composites using transparent blue Matrix strip at different depths. Materials and Methods: In this experimental-laboratory study, 48 specimens of methacrylate-and silylane-based composites were prepared in pre-made molds in thicknesses of 1, 2 and 3 mm. half of the specimens were cured with transparent polyester strips and the other half with blue strips, and then they were hardened by using a light-curing unit. The degree of conversion was determined by FT-IR. The degree of polymerization was assessed by comparing the IR absorption spectra between monomer and polymer specimens. The data were analyzed by performing Mann-Whitney and Kruskal-Wallis tests in SPSS. Results: The highest degree of conversion pertained to P90 composite with using transparent strip in 1 mm thickness (45. 5± 1. 29), while the lowest degree belonged to Z350 composite with using transparent strip in 3 mm thickness (14. 7± 1. 70). In comparison of the four groups, the silorane-based group with blue strip (41%) had the highest conversion degree, followed by the same composite (silorane) with transparent strip (39. 6%). Conversion degrees in these types of materials were much greater than those in metacrylate-based types (21%). Conclusion: In deep restorations with limited access to a light source, the use of silorane-based composites and blue polyester strips enhances the degree of conversion.

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APA: Copy

BAREKATAIN, MEHRDAD, MOUSAVINASAB, SEYED MOSTAFA, Azarbaijani, Saeid, RANJBARAN, FATEMEH SADAT, & Zadeh Dadashi, Masoud. (2018). Degree of Conversion of Metacrylate-and Silorane-based Dental Composites at Various Depths and Using Different Matrix Bands. JOURNAL OF MASHHAD DENTAL SCHOOL, 42(2 ), 133-140. SID. https://sid.ir/paper/74132/en

Vancouver: Copy

BAREKATAIN MEHRDAD, MOUSAVINASAB SEYED MOSTAFA, Azarbaijani Saeid, RANJBARAN FATEMEH SADAT, Zadeh Dadashi Masoud. Degree of Conversion of Metacrylate-and Silorane-based Dental Composites at Various Depths and Using Different Matrix Bands. JOURNAL OF MASHHAD DENTAL SCHOOL[Internet]. 2018;42(2 ):133-140. Available from: https://sid.ir/paper/74132/en

IEEE: Copy

MEHRDAD BAREKATAIN, SEYED MOSTAFA MOUSAVINASAB, Saeid Azarbaijani, FATEMEH SADAT RANJBARAN, and Masoud Zadeh Dadashi, “Degree of Conversion of Metacrylate-and Silorane-based Dental Composites at Various Depths and Using Different Matrix Bands,” JOURNAL OF MASHHAD DENTAL SCHOOL, vol. 42, no. 2 , pp. 133–140, 2018, [Online]. Available: https://sid.ir/paper/74132/en

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