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    • 3. 发明专利
    • Dispersion liquid of nanoscale glass particles for dentistry and preparation method thereof
    • 用于牙科的纳米玻璃颗粒的分散液及其制备方法
    • JP2014139172A
    • 2014-07-31
    • JP2014006542
    • 2014-01-17
    • Schott Agショット アクチエンゲゼルシャフトSchott AG
    • JOERG SCHUHMACHERJOCHEN HERRMANNSCHMIDT HANS-JOACHIMBASTIAN SCHOENJENS SUFFNER
    • A61K6/083
    • A61K6/083A61K6/0008A61K6/0091
    • PROBLEM TO BE SOLVED: To provide a translucent composite for dentistry that has a low thermal expansion coefficient, improves its compressive strength, tensile strength, flexural strength, abrasion resistance, and elastic coefficient, and uses a nanoscale x-ray non-transmission filler material as a base, and to provide a precursor thereof.SOLUTION: The present invention relates to the precursor of the composite for dentistry that comprises a matrix monomer which has: a nanoparticle mixed oxide matrix containing a silicic acid and a metal oxide (for example, Ba, Sr) as a filler; and at least one polymerizable group; and the composite for dentistry that can be produced by hardening the precursor. In the composite for dentistry, a particle size of a filler particle is 5-100 nm, and the content of a filler material is 10-70 wt.%. The difference in refractive index between the filler material and the matrix monomer is less than 0.1, and light transmissivity of light with a wavelength of 400-750 nm is 30% or more at the content of the filler material of 10 wt.%.
    • 要解决的问题:为了提供具有低热膨胀系数的用于牙科的半透明复合材料,提高其抗压强度,拉伸强度,弯曲强度,耐磨性和弹性系数,并且使用纳米级X射线非透射填充材料 作为基质,并提供其前体。解决方案:本发明涉及用于牙科的复合材料的前体,其包含基质单体,其具有:含有硅酸和金属氧化物的纳米颗粒混合氧化物基质(例如, Ba,Sr)作为填料; 和至少一个可聚合基团; 以及通过硬化前体可以产生的用于牙科的复合材料。 在牙科用复合体中,填料粒子的粒径为5〜100nm,填充材料的含量为10-70重量%。 填料与基体单体之间的折射率差小于0.1,当填料的含量为10重量%时,波长400-750nm的光的透光率为30%以上。