Mesoporous silica fillers and resin composition effect on dental composites cytocompatibility

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• 作者：Nina Attik^a ; ^b ; ¹ ; ^{nina.attik@univ-lyon1.fr} ; Franck Hallay^a ; ¹ ; Laurence Bois^a ; Arnaud Brioude^a ; Brigitte Grosgogeat^a ; ^b ; Pierre Colon^a ; ^c
• 关键词：Dental composite ; Porous fillers ; Human gingival fibroblast ; Cytocompatibility ; Confocal microscopy ; Time lapse imaging ; FTIR ; Conversion rate
• 刊名：Dental Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：33
• 期：2
• 页码：166-174
• 全文大小：2033 K
• 卷排序：33

文摘

Many new dental composites containing mesoporous silica fillers have been developed to improve rheological properties and enhance the resin–filler interface. To investigate the correlation between the cytocompatibility of several dental composites and their composition; two aspects have been considered: presence of bisphenol A (BPA)-glycidyl methacrylate (Bis-GMA) or triethyleneglycol-dimethacrylate (TEGDMA) among the resin monomers and presence of porous particles among the filler blends.MethodsFive commercial composites with different resin matrices and mineral fillers were compared to four experimental composites designed without any BPA-based monomers or TEGDMA. Porous fillers, with or without silanation, were added in some of the experimental composites. Two reference resin matrices were also selected. Cytocompatibility with cultured primary human gingival fibroblasts was assessed by confocal laser scanning microscopy with time-lapse imaging. Fourier transform infrared spectroscopy was used to control monomer conversion rate.ResultsConversion rates of the experimental composites ranged from 57% to 71%, a comparable ratio for dental composites. Experimental samples were better tolerated than tested commercial samples not containing TEGDMA and significantly better than those containing TEGDMA. Experimental composites with porous fillers exhibited good cytocompatibility, especially when surfaces were silanated.SignificanceCytotoxicity was associated with resin amount and especially resin nature. Composites containing porous fillers might behave as if the resin trapped into pores has no effect on toxicity. The cytotoxicity of composites with and without BPA derivatives was mainly attributed to the release of residual TEGDMA rather than the BPA derivatives.