Dental bonding pretreatment system based on iron and ferrous ions

Abstract

The present invention provides a dental bonding pretreatment system based on the idea of protecting exposed collagen from denaturation by iron ions. A dental restoration material (metal, porcelain, resin and the like) is adhered to a tooth body by using an adhesive material such as a dental adhesive. Ferric / ferrous ions and side chain groups such as carboxyl, phosphate radicals and the like in the demineralized dentin organic matrix are bonded to endow the dentin organic matrix with degradation resistance, and meanwhile, the bonded iron ions or iron-containing insoluble nanoparticles deposited based on in-situ induction of the iron ions are beneficial to enhancing the mechanical property of a dentin organic matrix three-dimensional network, improving the compatibility of a bonding interface and promoting permeation and uniform distribution of a bonding agent, so that ideal bonding strength and bonding durability are obtained, and additional functions can be obtained. By using the pretreatment system provided by the invention, even if the surface of the tooth is completely dry when the adhesive is coated, relatively high bonding strength and bonding durability can be obtained, and the technical sensitivity of clinical operation is greatly reduced.

Description

technical field [0001] The invention belongs to the field of dental bonding restoration materials, and relates to a dental bonding pretreatment system based on iron / ferrous ions, which is used for reducing the occurrence of secondary caries, improving the bonding effect, and reducing the technical sensitivity of bonding operations. Background technique [0002] In dental medicine, the restoration of tooth defects occupies most of the resources of oral medicine. Whether it is direct restoration or indirect restoration, it is inseparable from the use of bonding materials. [0003] A strong and long-lasting bond between the tooth tissue and the bonding material is the key to a successful restoration. As one of the bonding interfaces with complex structures, dentin's surface treatment determines the bonding strength and bonding durability, which directly affects the clinical restoration effect. [0004] At present, the clinical dentin bonding technology is a wet bonding technol...

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Problems solved by technology

[0006] However, although the wet bonding technique has obtained better initial bonding strength, the non-collagenous protein in the organic matrix of demineralized dentin contains a large number of highly reactive side chain groups such as carboxyl, phosphate, and sulfhydryl groups, making the non-collagenous Protein has strong hydration ability. In wet bonding environment, non-collagen protein forms a hydrogel-like structure on the surface of dentin collagen fibers. These structures form a structure similar to "molecular sieve", which seriously hinders the key hydrophobicity of the adhesive. The penetration and uniform distribution of components in the demineralized dentin collagen fiber network makes the formed tooth-adhesive bonding interface-hybrid layer full of defects, which will cause various problems when used in a complex oral environment for a long time , also often leads to the loss of the restoration

[0007] At the same time, in the long-term process, the demineralized dentin collagen that is not wrapped by the adhesive material is easy to denature under the action of water and enzymes, resulting in the disintegration of the bonding interface and further increasing the bonding failure rate

[0008] In addition, in the wet bonding technology, there is no standard for the degree of wetness of the tooth surface to be coated with adhesive, too wet or too dry tooth surface will affect the bonding effect, which has great technical sensitivity

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