title: Improved performance of Bis-GMA/TEGDMA dental composites by net-like structures formed from SiO2 nanofiber fillers.
abstract: The major objective of this study was to explore the effects of silicon dioxide (SiO2) nanofibers on the performance of 2, 2-bis-[4-(methacryloxypropoxy)-phenyl]-propane (Bis-GMA)/tri-(ethyleneglycol) dimethacrylate (TEGDMA) dental composites. At first, the mechanical properties of Bis-GMA/TEGDMA (50/50, w/w) resins containing different contents of SiO2 nanofibers were evaluated to identify the appropriate composition to achieve the significant reinforcing effect. Secondly, optimized contents (5 or 10wt.%) of SiO2 nanofibers were mixed into resins together with SiO2 microparticles, which was 60wt.% of the resin. Controls for comparison were Bis-GMA/TEGDMA resins containing only SiO2 microparticles (60wt.%) or with additional SiO2 nanoparticles (5 or 10wt.%). Properties including abrasion, polymerization shrinkage and mechanical properties were evaluated to determine the contribution of SiO2 nanofibers. In comparison with SiO2 nanoparticles, SiO2 nanofibers improved the overall performance of Bis-GMA/TEGDMA composite resins, especially in improving abrasion resistance and decreasing polymerization shrinkage. The explanations were that one-dimensional SiO2 nanofibers were able to shield particular fillers from being abraded off, and able to form a kind of overlapped fibrous network to resist polymerization shrinkage. With these approaches, SiO2 nanofiber-containing Bis-GMA composite resins were envisioned a promising choice to achieve long-term durable restorations in clinical therapies.
authors.affiliation: Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, PR China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China; Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing 100081, PR China. Electronic address: caiqing@mail.buct.edu.cn.
authors.forename: Qing
authors.initials: Q
authors.lastname: Cai
authors.affiliation: Department of Dental Materials, Peking University School and Hospital of Stomatology, Beijing 100081, PR China.
authors.forename: Xuehui
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wei
authors.affiliation: Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, PR China.
authors.forename: Mingming
authors.initials: M
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Yang
authors.affiliation: Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, PR China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Ma
authors.affiliation: First Clinical Division, Peking University School and Hospital of Stomatology, Beijing 100034, PR China.
authors.forename: Yali
authors.initials: Y
authors.lastname: Cheng
authors.affiliation: Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, PR China; National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing 100081, PR China; Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing 100081, PR China. Electronic address: kqdengxuliang@bjmu.edu.cn.
authors.forename: Xuliang
authors.initials: X
authors.lastname: Deng
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D006801:Humans; D057139:Nanofibers / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D011109:Polymethacrylic Acids / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D011109:Polymethacrylic Acids; D011140:Polyurethanes; C020946:triethylene glycol dimethacrylate; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; D012822:Silicon Dioxide
keywords: Dental composites; Polymerization shrinkage; Silicon dioxide nanofibers; Wear resistance