The polymerization efficiency of a bulk-fill composite based on matrixmodification technology
- Author:
Tarek M. ELSHAZLY
1
;
Christoph BOURAUEL
;
Moustafa N. ABOUSHELIB
;
Dalia I. SHERIEF
;
Dalia I. EL-KORASHY
Author Information
- Publication Type:Research Article
- From:Restorative Dentistry & Endodontics 2020;45(3):e32-
- CountryRepublic of Korea
- Language:English
-
Abstract:
Objectives:To evaluate the polymerization efficiency of a matrix-modified bulk-fill composite, and compare it to a conventional composite which has a similar filler system.The degree of conversion (DC%) and monomer elution were measured over different storage periods. Additionally, fillers' content was examined.
Materials and Methods:Cylindrical specimens were prepared, in bulk and incrementally, from Filtek Bulk Fill (B) and Filtek Supreme XTE (S) composites using a Teflon mold, for each test (n = 6). Using attenuated total reflection method of Fourier transformation infrared spectroscopy, DC% was measured after 24 hours, 7 days, and 30 days. Using high-performance liquid chromatography, elution of hydroxyethyl methacrylate, triethylene glycol dimethacrylate, urethane dimethacrylate, and bisphenol-A glycidyl dimethacrylate was measured after 24 hours, 7 days and 30 days. Filler content was examined by scanning electron microscopy (SEM). Data were analyzed using 2-way mixed-model analysis of variance (α = 0.05).
Results:There was no significant difference in DC% over different storage periods between B-bulk and S-incremental. Higher monomer elution was detected significantly from S than B.The elution quantity and rate varied significantly over storage periods and between different monomers. SEM images showed differences in fillers' sizes and agglomeration between both materials.
Conclusions:Matrix-modified bulk-fill composites could be packed and cured in bulk with polymerization efficiency similar to conventional composites.
