BACKGROUND International rules must be followed for testing biosecurity in dental materials. A new brand of restorative material appeared in the market and regulations indicated that it should be tested for toxicity. OBJECTIVES The aim of this study was to determine the 90-day sub chronic toxicity of one triethylene glycol dimethacrylate containing composite (MEDENTAL Light-Cure Composite™) o...

Color stabilities of experimental composite resins based on Bis-EFMA (a novel bisphenol A [BPA]-free monomer system) with 3M ESPE FiltekTM Z250 (FZ) and A-glycidyl methacrylate (Bis-GMA) urethane dimethacrylate (UDMA) were compared. was synthesized via the reaction between 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene 2-(methacryloyloxy)ethyl isocyanate. Experimental Bis-EFMA-, Bis-GMA-, UMDA-base...

Introduction: Composite resins have excellent mechanical properties, including fast polymerization,aesthetic quality, easy handling, and the ability to adhere enamel surfaces. However, there are alsosome disadvantages from this material, one of them is residual monomers. Bulk-fill composite areavailable in sculptable (solid) flowable (liquid) form. Most resin matrix aromatic oraliphatic acrylat...

objective(s): the aim of this study was to synthesis new dental nanocomposites reinforced with fabricated glass nanoparticles and compare two methods for fabrication and investigate the effect of this filler on mechanical properties. materials and methods: the glass nanoparticles were produced by wet milling process. the particle size and shape was achieved using psa and sem. glass nanoparticle...

There is still much debate about the release of bisphenol-A (BPA) from dental materials. Therefore, this study aimed to quantify BPA present as an impurity in both BPA-based and non-BPA-based monomers evaluate whether these may degrade upon salivary, bacterial, chemical challenges. was determined three different amounts (1, 2, 3 ?mol) each monomer (TEGDMA, UDMA, mUDMA, BisGMA, BisEMA-3, -6, -10...

et al., 2001). In deep cavities, the concentration of HEMA reaching the pulp would be in the range of 1.5-8 mmol/L, and about 4 mmol/L for TEGDMA (Noda et al., 2002). Inflammatory reactions (toxic reactions) are reported after the insertion of resin-based composites and adhesives in cavities very close to the pulp or when a (micro) perforation of the pulp had occurred. Consistently, the lack of...

BACKGROUND Vital pulp preservation in the treatment of deep caries is challenging due to bacterial infection. The objectives of this study were to synthesize a novel, light-cured composite material containing bioactive calcium-silicate (Portland cement, PC) and the antimicrobial quaternary ammonium salt monomer 2-methacryloxylethyl dodecyl methyl ammonium bromide (MAE-DB) and to evaluate its ef...

OBJECTIVES To investigate chemo-mechanical effects of incorporating alkaline bioactive glass nanoparticles into a light-curable dental resin matrix. METHODS An unfilled Bis-GMA/TEGDMA material was infiltrated with up to 20 wt% of ultrafine SiO2-Na2O-CaO-P2O5-Bi2O3 particles. The unfilled and filled resins were investigated regarding their viscosity before setting and compared to commercially ...

OBJECTIVES To formulate and evaluate new dual cured resin composite based on the inclusion of eugenyl methacrylate monomer (EgMA) with Bis-GMA/TEGDMA resin systems for intracanal post cementation and core build-up restoration of endodontically treated teeth. METHODS EgMA was synthesized and incorporated at 5% (BTEg5) or 10% (BTEg10) into dual-cure formulations. Curing properties, viscosity, T...