title: Characterization of a low shrinkage dental composite containing bismethylene spiroorthocarbonate expanding monomer.
abstract: In this study, a novel dental composite based on the unsaturated bismethylene spiroorthocarbonate expanding monomer 3,9-dimethylene-1,3,5,7-tetraoxa-spiro[5,5]undecane (BMSOC) and bisphenol-S-bis(3-meth acrylate-2-hydroxypropyl)ether (BisS-GMA) was prepared. CQ (camphorquinone) of 1 wt % and DMAEMA (2-(dimethylamino)ethyl methacrylate) of 2 wt % were used in a photoinitiation system to initiate the copolymerization of the matrix resins. Distilled water contact angle measurements were performed for the wettability measurement. Degree of conversion, volumetric shrinkage, contraction stress and compressive strength were measured using Fourier Transformation Infrared-FTIR spectroscopy, the AccuVol and a universal testing machine, respectively. Within the limitations of this study, it can be concluded that the resin composites modified by bismethylene spiroorthocarbonate and BisS-GMA showed a low volumetric shrinkage at 1.25% and a higher contact angle. The lower contraction stress, higher degree of conversion and compressive strength of the novel dental composites were also observed.
authors: Department of Prosthodontics, Affiliated Hospital of Medical College, Qingdao University, Qingdao 266003, Shandong, China. quietfly@163.com.
authors: Jing
authors: J
authors: Fu
authors: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China. simmer0728@sina.cn.
authors: Wenjia
authors: W
authors: Liu
authors: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China. haozi0548@163.com.
authors: Zhichao
authors: Z
authors: Hao
authors: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China. xiangnanwu01@gmail.com.
authors: Xiangnan
authors: X
authors: Wu
authors: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China. yinjian1000@126.com.
authors: Jian
authors: J
authors: Yin
authors: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China. dranilPanjiyar@gmail.com.
authors: Anil
authors: A
authors: Panjiyar
authors: Department of Dental Materials, West China Collage of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China. xqliu5102@sina.com.
authors: Xiaoqing
authors: X
authors: Liu
authors: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China. shenjiefei@scu.edu.cn.
authors: Jiefei
authors: J
authors: Shen
authors: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China. wanghang@scu.edu.cn.
authors: Hang
authors: H
authors: Wang
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D008422:Materials Testing; D058105:Polymerization; D017550:Spectroscopy, Fourier Transform Infrared; D017155:Wettability
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D017438:Bisphenol A-Glycidyl Methacrylate