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Fabrication method of zirconia restoration based on light-curing rapid prototyping

A manufacturing method and prosthesis technology, applied in dental prostheses, medical science, dentures, etc., can solve the problems of cracks, crown surface loss, difficulty in cutting fine structures and undercut structures, etc., to increase the contact area, increase the Mechanical splicing to ensure the effect of edge closeness

Active Publication Date: 2021-12-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: aim at the above existing problems, to provide a zirconia prosthesis production method based on light-curing rapid prototyping, to solve the problem that the traditional prosthesis production process is difficult to cut out fine structures and undercut structures, or it is easy to cause crowns. The problem of cracks due to the loss of local areas on the body surface

Method used

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  • Fabrication method of zirconia restoration based on light-curing rapid prototyping
  • Fabrication method of zirconia restoration based on light-curing rapid prototyping
  • Fabrication method of zirconia restoration based on light-curing rapid prototyping

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Embodiment 1

[0045] This embodiment discloses a prosthesis with a micro-profile structure. Specifically, as image 3 As shown, the micro-contour structure is designed on the tissue surface of the prosthesis. No micro-contour structure is designed in the occlusal force bearing area such as the surface to reduce stress concentration, and no micro-contour structure is designed in the cervical region (within 1.0mm from the cervical line) to ensure the edge tightness and avoid the occurrence of edge microleakage .

[0046] Such as Figure 4 As shown, the micro-profile structure can be a convex structure or a concave structure, which is selected according to the repair space and the bonding gap.

[0047] In specific design, such as Figure 4 As shown, the micro-profile structure is a point-like, strip-like or network-like structure or a combination thereof. Al commonly used in reference to zirconia 2 o 3 The particle size of the sandblasting particles and the size of the micro-profile st...

Embodiment 2

[0049] This embodiment discloses a method for making a zirconia restoration based on light-curing rapid prototyping, see the attached Figure 5 , including the following steps:

[0050] A. Obtain the three-dimensional data of the patient's abutment teeth.

[0051] There are many ways to obtain 3D data of abutment teeth, for example, it can be obtained by scanning the abutment teeth of the patient's oral cavity with dental scanning equipment (such as 3shape, shining3D dentalscan, etc.), or by preparing the final impression of the patient's oral cavity and then scanning the final impression.

[0052] B. Design a simulated restoration based on the 3D data of the abutment teeth. There are two optional design structures for the restoration, one is an integrated fully anatomical crown structure, and the other is a bottom crown structure. After the bottom crown is formed, veneering porcelain is piled on its surface to form a complete crown. Regardless of the design structure, the k...

Embodiment 3

[0070] This embodiment discloses a method for making a zirconia restoration based on light-curing rapid prototyping, such as Figure 5 shown, including the following steps:

[0071] A. Use dental optical scanning equipment to scan the abutment teeth, obtain the three-dimensional data of the abutment teeth, and store them in STL format.

[0072] B. Import the STL file into the dental CAD software, and design the final restoration of the missing part, such as figure 1 shown.

[0073] C. Add micro-contour structure to the tissue surface partition of the restoration:

[0074] Use 3D modeling software to add micro-contour structures to the tissue surface partitions of the restoration, such as figure 2 shown in No micro-contour structure is designed in the occlusal force-bearing area such as the surface to reduce stress concentration, and no micro-contour is designed in the cervical margin area (within 1.0mm from the cervical margin line) to ensure the edge tightness and avo...

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Abstract

The invention discloses a method for making a zirconia prosthesis based on photocuring rapid prototyping, comprising: obtaining three-dimensional data of abutment teeth of a patient; designing a simulated prosthesis according to the three-dimensional data of abutment teeth; designing a micro-profile structure on the tissue surface of the prosthesis; The light-curing rapid prototyping tool uses photosensitive zirconia slurry as a raw material to print out restorations; degrease, sinter and ultrasonically clean the printed restorations; bond the fully prepared restorations to the abutment teeth. The micro-contour structure provided by the present invention can increase the mechanical fit, improve the bonding strength of the zirconia all-ceramic restoration, reduce stress concentration, and ensure edge tightness; the convex or concave strip and mesh structures of the present invention, etc. On the premise of ensuring a high degree of closeness of the prosthetic body, the bonding gap is uniform and the stress is evenly distributed; the invention can realize the formation of fine structure of the tissue surface and avoid the occurrence of local missing or cracks.

Description

technical field [0001] The invention relates to the field of dental prosthesis production, in particular to a method for producing a zirconia prosthesis based on light-curing rapid prototyping and including a zirconia prosthesis structure design. Background technique [0002] Zirconia ceramics have excellent physical and mechanical properties, aesthetic properties and biocompatibility, and have been widely used in dental restorations in recent years. [0003] However, it is difficult for zirconia ceramics to obtain a rough surface through surface acid etching to provide sufficient mechanical locking force, and the chemical inertness of the ceramic itself also makes it difficult to form a good chemical bond with the resin adhesive, which cannot be achieved by conventional physical and chemical treatment methods. Ideal bond strength. [0004] In order to improve the bonding effect, physical sandblasting and surface modification (silicon dioxide coating) methods are often used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C13/083
CPCA61C13/083A61C13/0013A61C13/0006
Inventor 于海洋梅子彧楼雨欣鲁雨晴
Owner SICHUAN UNIV