阅读说明：本技术 一种3d打印氧化锆修复体及其制备方法以及其与牙体的粘接方法 (3D printed zirconia prosthesis, preparation method thereof and bonding method of prosthesis and tooth body ) 是由 吴国锋 陈晞 陆伟 孙方方 戴沄 于 2019-09-03 设计创作，主要内容包括：本发明公开了一种3D打印氧化锆修复体,涉及牙科修复技术领域,所述修复体上用于与牙体粘接的粘接面设置为粗化表面,所述粗化表面包括粘接面以及开设在粘接面上的微纹饰,所述微纹饰包括若干个凸块、凹槽或者凸块及凹槽；本发明还公开了一种3D打印氧化锆修复体的制备方法以及3D打印氧化锆修复体与牙体的粘接方法。本发明通过3D打印技术直接制备出含有粗化表面的氧化锆修复体,增加了树脂粘接剂与修复体的粘接面积,改善了修复体与牙体的粘接性能。(The invention discloses a 3D printed zirconia restoration, which relates to the technical field of dental restoration, wherein an adhesive surface for adhering with a tooth body on the restoration is a roughened surface, the roughened surface comprises an adhesive surface and a micro-texture arranged on the adhesive surface, and the micro-texture comprises a plurality of bumps, grooves or bumps and grooves; the invention also discloses a preparation method of the 3D printed zirconia restoration and a bonding method of the 3D printed zirconia restoration and a tooth body. The invention directly prepares the zirconia restoration body with the coarsened surface by the 3D printing technology, increases the bonding area of the resin adhesive and the restoration body, and improves the bonding performance of the restoration body and the tooth body.)

1. The 3D printing zirconia prosthesis is characterized in that: the bonding surface used for bonding with the tooth body on the prosthesis (3) is a roughened surface, the roughened surface comprises a bonding surface and a micro-texture arranged on the bonding surface, and the micro-texture comprises a plurality of bumps (1), grooves (2) or bumps (1) and grooves (2).

2. The 3D printed zirconia prosthesis of claim 1, wherein: the bump (1) is a regular or irregular geometric body, and the groove (2) is a regular or irregular geometric body.

3. The 3D printed zirconia prosthesis of claim 2, wherein: the convex block (1) and the groove (2) are both straight prisms.

4. The 3D printed zirconia prosthesis of claim 2, wherein: the convex block (1) and the groove (2) are both cylinders.

5. The 3D printed zirconia prosthesis of claim 2, wherein: the lug (1) and the groove (2) are both in a circular truncated cone shape.

6. The 3D printed zirconia prosthesis of claim 5, wherein: the end face diameter of the circular truncated cone-shaped projection (1) towards one end of the tooth body is larger than that of the circular truncated cone-shaped projection (1) away from one end of the tooth body, and the end face diameter of the circular truncated cone-shaped groove (2) towards one end of the tooth body is larger than that of the circular truncated cone-shaped groove (2) away from one end of the tooth body.

7. The 3D printed zirconia restoration according to any of the claims 1, wherein: the depth of the micro-texture is 200-300 μm.

8. A method of manufacturing a 3D printed zirconia restoration based on any of claims 1 to 7, wherein the method comprises: the method comprises the following steps:

s1: scanning the oral cavity of a patient by adopting a digital scanning technology to obtain a digital oral cavity model;

s2: designing a restoration body (3) on the basis of a digital oral cavity model, designing a roughened surface on an adhesive surface for adhering with a tooth body on the restoration body (3), and then printing the zirconium oxide restoration body (3) by a 3D printing technology.

9. A3D printing zirconia restoration body and tooth body bonding method is characterized in that: the method comprises the following steps:

s1: producing a zirconia prosthesis (3) by the production method according to claim 8, and coating a resin adhesive on the bonding surface of the prosthesis (3);

s2: pretreating the bonding surface of the tooth body;

s3: and (3) connecting the bonding surface of the zirconia restoration (3) to the bonding surface of the tooth body to position the zirconia restoration (3), and then performing illumination to complete the bonding of the zirconia restoration (3) and the tooth body.

10. The method for bonding a 3D printed zirconia prosthesis to a dental body as claimed in claim 9, wherein: the pretreatment of the tooth bonding surface in the S2 sequentially comprises the following steps: cleaning and polishing tooth surface, coating phosphoric acid gel, rinsing and keeping moist, coating pretreatment agent, blowing lightly and irradiating by light.

Technical Field

The invention relates to the technical field of dental restoration, in particular to a 3D printed zirconia restoration, a preparation method thereof and a bonding method of the restoration and a tooth body.

Background

In recent years, Yttrium stabilized tetragonal polycrystalline zirconia (Y-TZP) ceramics have been widely used in the field of dental restoration and implant, and 3 ~ 5% Yttrium oxide (Y2O 3) has been added to maintain a stable tetragonal crystal structure, thereby significantly improving mechanical and chemical stability compared to conventional glass-based ceramic systems.

The zirconia ceramics do not contain a glass matrix component and are difficult to be etched by hydrofluoric acid or phosphoric acid to form a rough surface to provide mechanical retention. In addition, the content of silicon element in zirconia ceramics is less than 1 wt%, while the content of silicon element in feldspar porcelain is as high as 50%, so that silane is difficult to sufficiently exert chemical coupling action on the zirconia surface. The good surface stability and chemical inertness can cause the low-efficiency and non-durable bonding effect between the zirconia restoration and the tooth tissue, the bonding force of the bonding agent is difficult to resist the attenuation effect of aging to the bonding force in the using process, and the long-term survival rate of the restoration is reduced. The zirconia has the characteristic of chemical inertness, so that the adhesion of the zirconia and resin becomes a clinical difficulty and a research hotspot. Surface modification of zirconia is essential to achieve better micro-mechanical interlocking or chemical bonding to increase the bonding strength.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a 3D printed zirconia restoration, a preparation method thereof and a method for bonding the restoration with a tooth body.

In order to solve the technical problems, the technical scheme of the invention is as follows:

A3D printing zirconia restoration body is characterized in that an adhesion surface used for adhering with a tooth body on the restoration body is a roughened surface, the roughened surface comprises an adhesion surface and a micro-texture arranged on the adhesion surface, and the micro-texture comprises a plurality of bumps, grooves or bumps and grooves.

Further, the bump is a regular-shaped or irregular-shaped geometric body, and the groove is a regular-shaped or irregular-shaped geometric body.

In the 3D printed zirconia restoration, the projections and the grooves are all right prisms.

In the 3D printed zirconia prosthesis, the projection and the groove are both cylinders.

In the 3D printed zirconia prosthesis, the projection and the groove are both in the shape of a truncated cone.

In the 3D printed zirconia prosthesis, the diameter of the end face of the truncated cone-shaped projection facing the tooth is larger than the diameter of the end face of the truncated cone-shaped projection far away from the tooth, and the diameter of the end face of the truncated cone-shaped groove facing the tooth is larger than the diameter of the end face of the truncated cone-shaped groove far away from the tooth.

The 3D printing zirconia restoration has the depth of the micro-texture of 200-300 mu m.

A preparation method of a 3D printed zirconia restoration comprises the following steps:

s1: scanning the oral cavity of a patient by adopting a digital scanning technology to obtain a digital oral cavity model;

s2: designing a restoration body on the basis of a digital oral cavity model, designing a roughened surface on an adhesive surface for adhering with a tooth body on the restoration body, and then printing out the zirconium oxide restoration body by a 3D printing technology.

A3D printing zirconium oxide restoration and tooth body bonding method comprises the following steps:

s1: preparing a zirconia prosthesis by the preparation method according to claim 8, and coating a resin adhesive on the adhesive surface of the prosthesis;

s2: pretreating the bonding surface of the tooth body;

s3: and (3) connecting the bonding surface of the zirconia restoration body to the bonding surface of the tooth body to position the zirconia restoration body, and then illuminating to complete the bonding of the zirconia restoration body and the tooth body.

In the aforementioned method for bonding the 3D printed zirconia prosthesis to the tooth, the pretreatment of the bonding surface of the tooth in S2 sequentially comprises the following steps: cleaning and polishing tooth surface, coating phosphoric acid gel, rinsing and keeping moist, coating pretreatment agent, blowing lightly and irradiating by light.

The invention has the beneficial effects that:

(1) according to the invention, the zirconia restoration body with the roughened surface is directly prepared by a 3D printing technology, and the surface micro-morphology of silicate ceramics treated by hydrofluoric acid is simulated, so that the capacity of a resin adhesive is increased, the specific surface area of an adhesive surface is increased, the micro-mechanical locking force of the resin-based adhesive is greatly increased, the problem that the zirconia restoration body cannot form the roughened surface due to the fact that the zirconia restoration body is difficult to be corroded by hydrofluoric acid or phosphoric acid is solved, and the adhesive property of the zirconia restoration body and a tooth body is improved; compared with cutting processing, the problems of material waste, cutter abrasion, more processing cycle times and the like are avoided;

(2) the shape and the depth of the micro-texture can be controlled by a 3D printing technology, so that the micro-texture can be adjusted according to actual needs, and the application range is wider;

(3) the invention also designs the micro-texture into the boss or the groove, when the two forms of micro-texture are used, the resin adhesive can enter the gap or the groove between the bosses, and after the adhesive is solidified, a stronger limiting force can be generated between the adhesive and the micro-texture, thereby further improving the adhesive property of the adhesive and the restoration;

(4) the invention also firstly pretreats the tooth body when the prosthesis is adhered with the tooth body, and the acid etching is carried out on the tooth surface through the phosphoric acid gel, thereby increasing the roughness of the tooth body surface, further increasing the adhesive property of the tooth body and the resin adhesive and ensuring the adhesive property of the prosthesis and the tooth body.

Drawings

FIG. 1 is a schematic view of a roughened surface of example 1;

FIG. 2 is a schematic view of the roughened surface of example 2;

FIG. 3 is a schematic view of the roughened surface of example 3;

FIG. 4 is a schematic view of the roughened surface of example 4;

FIG. 5 is a schematic view of the roughened surface of example 5;

FIG. 6 is a schematic view of the roughened surface of example 6;

FIG. 7 is a schematic view of the roughened surface of example 7;

FIG. 8 is a schematic view of the roughened surface of example 8;

wherein: 1. a bump; 2. a groove; 3. and (3) repairing the body.

Detailed Description

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.