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Method for adhering and combining zirconia prosthesis and natural tooth

A technology of zirconia and restorations, which is applied in the field of bonding and bonding of zirconia restorations and natural teeth to achieve the effect of improving the bonding performance

Active Publication Date: 2018-10-16
HANGZHOU ERRAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that none of the existing physical and chemical methods can make an ideal roughened surface on dental zirconia ceramics.

Method used

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  • Method for adhering and combining zirconia prosthesis and natural tooth
  • Method for adhering and combining zirconia prosthesis and natural tooth
  • Method for adhering and combining zirconia prosthesis and natural tooth

Examples

Experimental program
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Effect test

preparation example Construction

[0073] 2. Preparation of molding and coating raw materials:

[0074] 2.1 Suspension slurry of zirconia

[0075] Add zirconium hydroxide suspension with a concentration of 0.5-1mol / L into the reactor, then add yttrium oxide into the reactor in 3-5 times, heat the reactor to 40-60°C, and keep it warm for 2-3 Hours, after the added yttrium oxide is completely dissolved, add 0.5-1% dispersant polyethylene glycol accounting for the weight of zirconium hydroxide, then heat to 200-250°C, keep warm for 55-65 hours to carry out hydrothermal-hydrolysis reaction, during Keep the internal pressure of the reactor at 2-3MPa to gradually hydrolyze the precipitate; use a centrifuge to quickly separate the precipitate, vacuum filter the precipitate, wash with distilled water and ethanol, and dry to obtain a partially stable oxidized yttrium with a yttrium content of 2-6mol%. Zirconium precursor; mix the yttrium partially stabilized zirconia precursor with the dispersant polyethylene glycol ac...

Embodiment 1

[0088] Restoration type is veneer restoration 1 (eg figure 2 ), the area is larger, the whole is thicker, and the edges are also thicker. It is required that the bonding surface is completely covered with mesh, and the mesh depth is deepened.

[0089] Step 1. All mesh processing requires high edge strength. Partially sintered zirconia ceramic green bodies can reduce the risk of edge cracking. Prepare partially sintered zirconia ceramic green bodies with a diameter of 20 mm and a height of 20 mm.

[0090] Step 2. Use NX10.0 for processing programming, set the grid tool path as a horizontal line, the grid depth is 0.05mm, the grid spacing is 0.98mm, and the grid range covers the entire bonding surface, such as image 3 , 4 . The tool is a 1mm hard alloy coated ball end milling cutter, the spindle speed is 12000rpm, the milling feed is 600mmpm, and the processing program is generated. The micro-decoration shape that the present invention can process in addition can also be as...

Embodiment 2

[0100] The type of restoration is a veneer restoration, which has a larger area, thinner overall, and thinner edges. It is required that only part of the mesh should be made on the bonding surface to protect the edges, and the mesh depth should not be too deep.

[0101] Step 1. Prepare an unsintered zirconia ceramic green body, the length, width and height are respectively 40×17×20 mm;

[0102] Step 2. Use SUM3D for processing programming, set the grid tool path to be vertically staggered, the grid depth is 0.03mm, the grid spacing is 0.3mm, and the grid range is 2mm from the edge, such as Figure 5 . The tool is a 0.6mm carbide ball end milling cutter, the spindle speed is 15000rpm, the milling feed is 1000mmpm, and the processing program is generated.

[0103] Step 3. Import the processing program into the three-axis numerical control machine tool to process the zirconia ceramic green body. During the processing, the zirconium powder peeled off was continuously blown away ...

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Abstract

The invention discloses a method for adhering and combining a zirconia prosthesis and a natural tooth. The method has the advantages that an existing sand blast process for processing is not used, thesurface of dental-department zirconia ceramic is milled, material mechanical damage is avoided, micro-ornamentation is formed on the surface of the dental-department zirconia ceramic to perform surface roughening under the condition that the later mechanical strength of the ceramic is unaffected so as to increase the specific surface area of the zirconia ceramic, and the zirconia prosthesis and the natural tooth are adhered and combined by using resin as the adhesive through methods such as surface processing, coating and novel sand blast.

Description

technical field [0001] The invention relates to the technical field of making dental ceramic materials, in particular to a method for bonding and combining zirconia restorations with natural teeth. Background technique [0002] At present, there are many kinds of dental restoration ceramics used in clinic, mainly including alumina-based ceramics, glass-based ceramics and zirconia-based ceramics. Due to the different main components of each material, its physical and chemical properties are also different. Among them, zirconia stands out among many dental all-ceramic materials due to its excellent mechanical properties, which greatly broadens the indications of all-ceramic restorations. Similar to other types of all-ceramic materials, resin-based adhesives are preferred as cements when zirconia ceramics are used. However, due to the dense and smooth surface of zirconia ceramics, high chemical inertness and high hardness, its bonding performance with resin is poor. And when ...

Claims

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Application Information

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IPC IPC(8): C04B41/89C04B35/48C04B35/622C04B35/64B24C3/32A61K6/02B28B11/08
CPCA61K6/818B24C3/32B28B11/0836C04B35/48C04B35/622C04B35/64C04B41/009C04B41/52C04B41/89C04B2235/612C04B2235/616C04B2235/661C04B41/5042C04B41/5031C04B41/522C04B41/45
Inventor 沈志坚李廷凯赵武元刘文广
Owner HANGZHOU ERRAN TECH
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