Surface Integrity of Dimethacrylate Composite Resins with Low Shrinkage Comonomers |
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Authors: | Jingwei He,Sufyan Garoushi,Eija Sä ilynoja,Pekka Vallittu,Lippo Lassila |
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Affiliation: | 1.Department of Biomaterials Science and Turku Clinical Biomaterials Center—TCBC, Institute of Dentistry, University of Turku, 20520 Turku, Finland; (S.G.); (P.V.); (L.L.);2.College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China;3.Research Development and Production Department, Stick Tech Ltd.—Member of GC Group, 20521 Turku, Finland;4.City of Turku Welfare Division, Oral Health Care, 20101 Turku, Finland |
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Abstract: | The goal of current research was to investigate the influence of adding low shrinkage “Phene” like comonomers hexaethylene glycol bis(carbamate-isoproply-α-methylstyrene) (HE-Phene) and triethylene glycol bis(carbamate-isoproply-α-methylstyrene) (TE-Phene) on the surface and color characteristics of composite resin. A range of weight fractions (0, 10, 20, 30, 40 wt.%) of HE/TE-Phene monomers were mixed with bisphenol A glycidyl methacrylate (GMA)/triethylene glycol dimethacrylate (TEGDMA) monomer. Experimental composite resins were made by mixing 71 wt.% of silica fillers to 29 wt.% of the resin matrix. A Vickers indenter and glossmeter were used for testing surface hardness (SH) and gloss (SG) at 60°. A chewing-simulator was used to evaluate the surface wear after 15,000 cycles. Color change (∆E) and translucency parameter (TP) were measured using a spectrophotometer. Data showed that HE/TE-Phene monomer had no negative impact (p > 0.05) on surface gloss, wear, color change and translucency of experimental composite resins. Surface hardness was in a reducing direction with the increas in HE/TE-Phene weight fraction (p < 0.05). The study results suggested that incorporating HE/TE-Phene monomers up to 30 wt.% with Bis-GMA/TEGDMA resin did not negatively influence the surface integrity of composite resins except for SH. |
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Keywords: | low-shrinkage monomers surface gloss wear color change |
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