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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Surface structural change of bioactive inorganic filler-resin composite cement in simulated body fluid: effect of resin.
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Surface structural change of bioactive inorganic filler-resin composite cement in simulated body fluid: effect of resin.

机译：模拟体液中生物活性无机填料-树脂复合水泥的表面结构变化：树脂的影响。

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摘要

Recently much attention has been paid to bioactive filler-resin composite cements because they can solidify in a few minutes to give high mechanical strengths and they can bond to living bone. In this study the dependence on resin of apatite-forming ability in simulated body fluid (SBF) was investigated for the composite cements of bioactive CaO-SiO2-P2O5-CaF2 glass with polymethyl methacrylate (PMMA) or bisphenol-a-glycidyl methacrylate/triethyleneglycol (Bis-GMA/TEGDMA) resin. The PMMA-containing composite cement did not show the apatite-forming ability in SBF because the reaction of the glass grains with SBF was inhibited due to the complete covering of the grains with PMMA. To the contrary, the Bis-GMA/TEGDMA-containing cement exhibited high apatite-forming ability in SBF; these monomers significantly dissolved from the composite surface into SBF, causing a direct exposure of the glass grains to SBF to convert into silica gel. It is assumed that thus formed silica gels, and the silicate ions that were dissolved and adsorbed onto the composite surface, induced the apatite nucleation between the spaces of the glass grains and on the composite surface, respectively. A continuous bone-like apatite layer was formed on the top surface of the glass-Bis-GMA/TEGDMA composite cement in a short period.
机译：最近，生物活性填料-树脂复合水泥引起了人们的广泛关注，因为它们可以在几分钟内固化以提供较高的机械强度，并且可以粘结到活骨上。在这项研究中，研究了生物活性CaO-SiO2-P2O5-CaF2玻璃与聚甲基丙烯酸甲酯（PMMA）或双酚-a-甲基丙烯酸缩水甘油酯/甲基丙烯酸三乙二醇酯的复合水泥对模拟体液（SBF）中磷灰石形成能力的依赖性。 （Bis-GMA / TEGDMA）树脂。含PMMA的复合水泥在SBF中没有形成磷灰石的能力，因为玻璃颗粒与SBF的反应由于PMMA完全覆盖而被抑制。相反，含Bis-GMA / TEGDMA的水泥在SBF中显示出高的磷灰石形成能力。这些单体从复合材料表面显着溶解到SBF中，导致玻璃颗粒直接暴露于SBF中，从而转化为硅胶。假定由此形成的硅胶以及溶解并吸附在复合材料表面上的硅酸盐离子分别在玻璃颗粒的空间之间和复合材料表面上引起磷灰石形核。在短时间内在玻璃-Bis-GMA / TEGDMA复合水泥的顶表面上形成了连续的骨状磷灰石层。

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