Dental prosthetic material and preparation method thereof

Abstract

The invention discloses a dental prosthetic material and a preparation method thereof. The method comprises the following steps of (1) immersing dentin in an EDTA aqueous solution; and (2) putting the dentin treated by the step (1) in a sodium hyaluronate-calcium nitrate hydrogel, adding a dihydrogen phosphate ion and fluoride ion aqueous solution after standing; and reacting to obtain the dental prosthetic material, wherein the sodium hyaluronate-calcium nitrate hydrogel is a mixture of sodium hyaluronate and calcium nitrate aqueous solutions. With the preparation method provided by the invention, a dense dental prosthetic material with a bionic structure analogous to human enamel is grown on the surface of the isolated human dentin directly under an environment similar to human physiological conditions (37 DEG C, atm, pH6.0) through a simple chemical method. The film dental prosthetic material has an extremely similar structure to that of natural human enamel and has apatite hexagonal prism crystals and enamel crystal column microstructures. Mechanical properties of the dental prosthetic material are between that of natural human enamel and that of the dentin.

Description

technical field [0001] The invention relates to a dental restorative material and a preparation method thereof. Background technique [0002] Dentin constitutes the main part of the tooth body. It is located in the inner layer of enamel and cementum, and is also the side wall of the pulp cavity and root canal. It is light yellow in color. Among them, minerals account for about 65% to 75%, organic matter accounts for 20%, and the remaining 5% to 10% is water, so the mineralization is not as good as enamel, but it has greater elasticity than enamel. The average microhardness is about 1 / 5 of that of enamel, but the hardness at the junction of the two is higher, about 3 times that of the proximal medullary end, which can enhance the support for the enamel column. [0003] If you observe with a microscope, you can see that there are many thin tubes arranged regularly in the dentin, called dentinal tubules, and there are nerve fibers in the tubes. When the dentin is exposed, it c...

AI Technical Summary

Problems solved by technology

This method also has disadvantages: 1. There is a large difference in the composition of the drug and dentin, and the desensitization effect achieved by the method of protein coagulation is not durable; 2. Sulfonol, thymol, silver nitrate ammonia, 75% Desensitization drugs such as sodium fluoride are highly irritating, and patients need to bear greater pain during the treatment process

However, this process cannot completely prevent external damage stimuli, nor can it return to the original state without damage. An effective medical method is still needed for clinical treatment.

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