Magnesium oxide for magnesium phosphate concrete, preparation method of magnesium oxide and magnesium phosphate concrete

Abstract

The invention belongs to the field of medical biological materials and discloses a magnesium oxide for magnesium phosphate concrete, a preparation method of the magnesium oxide and a magnesium phosphate concrete. The magnesium phosphate concrete comprises phosphate, magnesium oxide, sugar and calcium salt, wherein the weight ratio of phosphate to magnesium oxide is (2.5-1):1; the magnesium oxide is the mixture of two magnesium oxides with different reactivities at different roasting temperatures; and the reactivity of the magnesium oxide roasted at higher temperature is lower than the reactivity of the magnesium oxide roasted at lower temperature. The preparation method comprises the following steps of: preparing two magnesium oxides with different reactivities at different roasting temperatures into the magnesium oxide mixture in different proportions according to a target solidifying time, and solving the solidifying time of the concrete obtained by the mixtures; drawing a solidifying time curve according to the ratio of solidifying time to mixture proportion, and searching for the mixture proportion corresponding to the solidifying time on the curve; and finally, preparing the magnesium oxide mixture from the two magnesium oxides at different roasting temperatures according to the ratio. The mechanical strength, the degradability and the biocompatibility of such a material are all improved.

Description

technical field [0001] The invention belongs to medical biomaterials; specifically, it is a magnesium phosphate cement, which relates to the treatment of bone and its accessory structure damage. Fixed bone or reconstructed ligaments can also be used to stabilize the prosthesis. Background technique [0002] Magnesium phosphate cement (magnesium phosphate cement, MPC) is a kind of chemically bonded magnesium phosphate ceramics formed by magnesium oxide and acid phosphate through the acid-base neutralization reaction in aqueous medium at room temperature. ). These materials have the following characteristics: [0003] 1. Its properties are between sintered ceramics and traditional cement, the synthesis process is similar to traditional cement, and it also has the structure and characteristics of sintered ceramics; [0004] 2. Fast solidification, hard texture, expansibility, and can form a firm bond with a variety of materials; [0005] 3. It is an all-inorganic, pH-neutra...

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Problems solved by technology

[0015] For the above-mentioned problems that current MPC biomaterials exist, the purpose of the present invention is to provide a kind of magnesium oxide for magnesium phosphate cement, and its preparation method, to solve the magnesium oxide calcining time and temperature that are used for magnesium phosphate cement. Many of the above-mentioned disadvantages brought about by screening or empirically determining

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