CN111451508A - Method for designing and manufacturing surface structure of dental prosthesis in glaze-like dentin boundary - Google Patents

Abstract

The invention relates to a method for designing and manufacturing a surface structure of a dental prosthesis in the glaze-imitated dentin boundary, which comprises the following steps: the surface of the dental prosthesis is divided into 2 layers, and a printing file is generated by using 3D printing software; the inner layer is of a solid structure, and the outer layer is of a gradient hollow structure with gradually increasing porosity from inside to outside; the porosity of the innermost layer of the hollow structure is 0, and the porosity of the outermost layer is 50-80%; the shape of the pores and the gaps is a glaze-like dentinal junction structure; printing and forming by using a 3D printer; the used material can be pure titanium, titanium alloy, zirconium oxide or titanium-zirconium based amorphous metal glass; can be clinically bonded and repaired after being sterilized. The invention can effectively improve the surface bonding performance of the prosthesis, model the mechanical buffer effect of the glaze dentin interface to a certain extent, reduce the local stress concentration in the chewing functional state, obviously reduce the generation and the development of the prosthesis micro-leakage and the secondary caries through the complex interface structure, and improve the long-term success rate of the dental prosthesis.

Description

Method for designing and manufacturing surface structure of dental prosthesis in glaze-like dentin boundary

Technical Field

The invention relates to a dental prosthesis in the glaze-imitated dentin sphere, in particular to a method for designing and manufacturing the surface structure of the dental prosthesis in the glaze-imitated dentin sphere.

Background

The dental restoration manufactured by casting or material reduction has simple interface with the rest natural teeth or implant abutments, in order to improve the bonding force, the restoration is often needed to be subjected to sand blasting, acid etching or special retention structure design, the operation is complicated and the effect is not ideal, especially when high-strength materials such as zirconium oxide and the like are applied, the ideal bonding interface is difficult to obtain by the conventional process, so that the restoration is easy to fall off after permanent bonding, or the clinical application of excellent restoration materials is limited due to insufficient shearing force after bonding.

Disclosure of Invention

The invention aims to provide a method for designing and manufacturing a surface structure of a dental prosthesis in a glaze-imitated dentin interface, which can effectively improve the bonding property of the surface of the prosthesis, mould the mechanical buffer effect of the glaze-imitated dentin interface to a certain extent, reduce the local stress concentration in a chewing functional state, remarkably reduce the occurrence and the progress of micro-leakage and secondary caries of the prosthesis through a complex interface structure and improve the long-term success rate of the dental prosthesis.

In order to achieve the purpose, the invention has the following technical scheme:

the invention relates to a method for designing and manufacturing a surface structure of a dental prosthesis in an enamel-like dentin boundary, which comprises the following steps:

1) the surface of the dental prosthesis is divided into 2 layers, and a printing file is generated by using 3D printing software;

2) the inner layer is of a solid structure, and the outer layer is of a gradient hollow structure with gradually increasing porosity from inside to outside;

3) the porosity of the innermost layer of the hollow structure is 0, and the porosity of the outermost layer is 50-80%;

4) the shape of the pores and the gaps is a glaze-like dentinal junction structure;

5) printing and forming by using a 3D printer;

6) the used material can be pure titanium, titanium alloy, zirconium oxide or titanium-zirconium based amorphous metal glass;

7) can be clinically bonded and repaired after being sterilized.

Wherein, the glaze-like dentinal junction structure consists of enamel, dentin and dentinal junction, the dentinal junction consists of a plurality of arc-shaped small concave bodies which are next to each other, the convex surfaces of the small concave bodies face to the dentin, and the concave surfaces of the small concave bodies face to the enamel

The invention has the advantages that: the bonding performance of the surface of the restoration body can be effectively improved, the mechanical buffering effect of the glaze dentin interface is simulated to a certain degree, the local stress concentration in the chewing function state is reduced, the generation and the progress of the micro-leakage and the secondary caries of the restoration body can be obviously reduced through a complex interface structure, and the long-term success rate of the dental restoration body is improved.

Drawings

FIG. 1 is a schematic structural view under a microscope of the enamel-like dentin junction of the present invention;

in the figure, 1, dentin; 2. the dentinal junction; 3. long glaze clumps; 4. and (5) glaze columns.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The invention relates to a method for designing and manufacturing a surface structure of a dental restoration in an enamel-like dentin boundary, which comprises the following steps:

1) the surface of the dental prosthesis is divided into 2 layers, and a printing file is generated by using 3D printing software;

2) the inner layer is of a solid structure, and the outer layer is of a gradient hollow structure with gradually increasing porosity from inside to outside;

3) the porosity of the innermost layer of the hollow structure is 0, and the porosity of the outermost layer is 50-80%;

4) the shape of the pores and the gaps is a glaze-like dentinal junction structure;

5) printing and forming by using a 3D printer;

6) the used material can be pure titanium, titanium alloy, zirconium oxide or titanium-zirconium based amorphous metal glass;

7) can be clinically bonded and repaired after being sterilized.

Referring to fig. 1, the printed and formed glaze-like dentinal junction structure consists of enamel, dentin and a dentinal junction, wherein the dentinal junction consists of a plurality of small arc-shaped concave bodies which are next to each other, the convex surfaces of the small concave bodies face to the dentin, and the concave surfaces of the small concave bodies face to the enamel; the enamel is composed of long enamel clusters and enamel columns; the small concave bodies are composed of short glaze clumps.

Compared with the existing dental prosthesis, when oral bacteria permeate between the prosthesis and the dental preparation body from the edge of the prosthesis and the dental preparation body, if the surface structure of the implant is a single straight interface, the resistance of the bacteria permeation is small; when the interface is a complex enamel-like dentin boundary structure, bacteria can permeate more slowly, so that the occurrence and the progress of the micro-leakage and the secondary caries of the prosthesis can be obviously reduced.

Software of the 3D printer and the 3D printer, wherein the software of the oral medical laser cladding 3D printer and the matched 3D printer which are produced by Nanjing Qianjin Intelligent science and technology Limited company in China is adopted when the metal structure is printed; the medical zirconia 3D printer for the oral cavity and the software of the matched 3D printer which are produced by Hangzhou and natural science and technology limited company are adopted when the zirconia structure is printed.

Porosity: the ratio of the cumulative sum of all pore volumes in the pore layer on the surface of the dental implant to the whole volume of the pore layer.

As described above, the present invention can be more fully realized. The above description is only a reasonable embodiment of the present invention, and the scope of the present invention includes but is not limited to the above description, and any insubstantial modifications of the technical solution of the present invention by those skilled in the art are included in the scope of the present invention.

Claims (2)

1. A method for designing and manufacturing a surface structure of a dental prosthesis in a glaze-like dentin boundary is characterized by comprising the following steps:

1) the surface of the dental prosthesis is divided into 2 layers, and a printing file is generated by using 3D printing software;

2) the inner layer is of a solid structure, and the outer layer is of a gradient hollow structure with gradually increasing porosity from inside to outside;

3) the porosity of the innermost layer of the hollow structure is 0, and the porosity of the outermost layer is 50-80%;

4) the shape of the pores and the gaps is a glaze-like dentinal junction structure;

5) printing and forming by using a 3D printer;

6) the used material can be pure titanium, titanium alloy, zirconium oxide or titanium-zirconium based amorphous metal glass;

7) can be clinically bonded and repaired after being sterilized.

2. The method for designing and manufacturing the surface structure of the dental prosthesis in the enamel-like dentin sphere according to claim 1, wherein the method comprises the following steps: the glaze-like dentinal junction structure consists of enamel, dentin and a dentinal junction, wherein the dentinal junction consists of a plurality of arc-shaped small concave bodies which are next to each other, the convex surfaces of the small concave bodies face to the dentin, and the concave surfaces of the small concave bodies face to the enamel.

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