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General Chemistry ›› 2016, Vol. 2 ›› Issue (1): 55-63.DOI: 10.21127/yaoyigc20150006

• Full Papers • Previous Articles    

Degree of Conversion, Bond Strength and Biocompatibility of the APTES@SiO2 Strengthened Experimental Dental Adhesive

Bin Zhang,†,a Juan Zhou,†,*,c Peicheng Xu,†,b Ziyuan Zhu,d Jun Zhu,c Wenhao Qian,*,b Dannong He*,a,c()   

  1. a School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    b Shanghai Xuhui District Dental Center, Shanghai 200032, China
    c National Engineering Research Center for Nanotechnology, Shanghai 200241, China
    d Shanghai Ninth People#cod#x02019;s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
  • Received:2015-11-11 Accepted:2015-12-07 Online:2016-03-31 Published:2016-03-31
  • Contact: Juan Zhou,Wenhao Qian,Dannong He


The aim of this study was to investigate the effect of incorporation of the nano silica modified with (3-aminopropyl)triethoxysilane (APTES@SiO2) on the degree of conversion, bond strength and biocompatibility of an experimental dental adhesive. An amphiphilic bonding system was used as the experimental dentin bonding system. The APTES@SiO2 with diameter of 70 nm was prepared and added into the experimental dentin bonding system as nanofiller, and the effect of the modification on the stability of the nano APTES@SiO2 dispersed in the experimental adhesive was studied. In addition, the morphology, degree of conversion, bond strength to dental restorative resin and biocompatibility of the experimental adhesives containing nanofiller were tested. After modification, the dispersion stability of the nano particles in the adhesive was improved. With increasing the content of the nano APTES@SiO2, the rate of light conversion increased significantly. However, the ultimate degree of conversion, bond strength to resin and bulk compressive strength was not significantly affected. Compared with the adhesive without nanofiller, the adhesive with 2 wt% APTES@SiO2 showed better bond strength to dentin and lower polymerization shrinkage. In addition, the experimental adhesive showed slight cytotoxicity with the incorporation of APTES@SiO2, but it was attenuated at low concentration.

Key words: experimental dental adhesive, degree of conversion, bond strength, APTES@SiO2, biocompatibility

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