Light-cured composite resin for oral cavity by using single crystal diamond as filler and preparation method thereof

Abstract

The invention relates to a light-cured composite resin for an oral cavity by using single crystal diamond as a filler, which belongs to the field of a medical oral cavity material. The resin comprises a resin matrix and the filler, wherein the filler comprises coupling barium glass powder and coupling diamond. The composite resin is characterized in that the coupling diamond comprises coupling single crystal diamond which accounts for 15-25 percent of the total weight of the composite resin, coupling glomerocryst diamond which accounts for 0-1 percent of the total weight of the composite resin and coupling nanometer diamond which accounts for 0-1 percent of the total weigh of the composite resin. The single crystal diamond is added as the functional filler, so that the flexural strength and the micro hardness of the prepared composite resin are observably increased, the maximum flexural strength value of the composite resin, which can reach 112.5MPa, can satisfy the requirement in a national medical standard that flexural strength value of the composite resin should be equal to or greater than 50 MPa, even can satisfy the requirement for the strength (greater than 80 MPa) of occlusal restoring materials.

Description

technical field [0001] The invention relates to a novel light-cured composite resin material for oral cavity and a preparation method thereof, in particular to a composite resin added with artificial single crystal diamond filler and a preparation method thereof. Background technique [0002] Visible light-curable composite resin is a new type of oral material, and it is one of the commonly used filling materials and restoration materials in stomatology. It is used to repair tooth defects caused by dental caries and trauma. It has the advantages of convenient operation, good transparency, strong adhesion and beautiful color, and is widely used in the field of oral cavity. Its matrix is ​​formed by free radical polymerization of monomers containing methacrylate functional groups, and the reinforcement is inorganic particle filler. Since the advent of light-curing repair resin in the 1960s, it has been developed for more than 40 years. It has many improvements in the matrix, ...

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Problems solved by technology

The inventor is committed to the research and application of artificial diamond. It is mentioned in the article "Research on Modified Nano-diamond Reinforced and Toughened Medical Dental Composite Resin" (New Chemical Materials, Issue 02, 2006) that barium glass powder is used as the main filler Adding 0.2% synthetic nano-diamond to the medical oral composite resin, the flexural strength and microhardness of the composite resin are greatly improved. Zhong Yuxiu's "Influence of nano-diamond filler on the wear resistance and flexural strength of composite resin" (Oral Medicine, 2005 03 period) pointed out that when the addition amount of nano-diamond was 0.02-0.6%, the wear resistance and flexural strength were obviously improved, but the addition amount was 1%, its wear resistance and flexural strength had no obvious change, so Increasing the content of artificial nano-diamond, the wear resistance and flexural strength of the composite resin do not increase, but decrease, and the price of artificial nano-diamond is very expensive, it is impossible to add too much, so I want to further improve the composite resin. Flexural strength and microhardness, need to find new suitable fillers

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