Dental repair composite resin with biological activity and preparation method thereof
A composite resin, dental restoration technology, applied in dental preparations, dentistry, medical science and other directions, can solve the problems that the continuity of organic monomers is easily affected by inorganic fillers, affect the performance of dental restoration resins, and have poor compatibility. The effect of promoting the formation of hydroxyapatite, improving the mechanical properties and increasing the concentration
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[0050] (1) Preparation of silica wollastonite
[0051]Mix 224ml of ethyl orthosilicate with 144ml of water, add nitric acid solution, adjust the pH value to 3, fully stir at room temperature for 30min, then add 0.25mol magnesium nitrate hexahydrate and 1.75mol calcium nitrate tetrahydrate and stir for 4h, seal it, and Aging at 60°C for 2 days and drying at 120°C for 2 days. The dried xerogel was calcined at 1350° C. for 3 hours to obtain pure white wollastonite powder.
[0052] (2) Silanization modified white wollastonite
[0053] Weigh 30.0g of white wollastonite powder, pour it into a 1000ml flask, measure 600ml (the ratio of the two is 1g:20mL) cyclohexane into the above flask, add the rotor, put it into the heat collecting type magnetic stirring In a container, stir at 700r / min for 15min at 30°C. While stirring, weigh 3.00 g of γ-methacryloxypropyltrimethoxysilane (γ-MPS) into a centrifuge tube, add 0.60 g of n-propylamine dropwise therein, shake and mix evenly. Then i...
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