Zirconia porcelain block for manufacturing false tooth

Abstract

The invention relates to a zirconium oxide porcelain block for manufacturing false teeth, which comprises a zirconium oxide porcelain block body, and the surface of the zirconium oxide porcelain block body is coated with a protective layer formed by curing a light-cured resin monomer. The protective layer is utilized to solve the problem that the zirconia porcelain block body is damaged in the transportation and false tooth processing processes.

Description

Technical Field

[0001] The invention relates to the field of artificial teeth, in particular to a zirconium oxide ceramic block for manufacturing artificial teeth. Background Art

[0002] Dentures are also known as false teeth. Zirconia ceramic blocks can simulate the color and transparency of natural teeth very well. Zirconia ceramic blocks are hard, wear-resistant and aesthetically pleasing. With their excellent physical and chemical properties, stable biocompatibility and good aesthetic restoration effects, zirconia ceramic blocks are rapidly popularized as materials for manufacturing dentures around the world. The production process is to clamp the edge of the zirconia ceramic block on the engraving and milling equipment, and then perform rough cutting in the middle of the zirconia ceramic block to initially form a rough blank in the approximate shape of the denture, and finally perform fine cutting on the rough blank to make the denture. However, during transportation and rough cutting, zirconia ceramic blocks are easily affected by external forces, which may cause the edges of the zirconia ceramic blocks to collapse and crack, causing damage to the product and affecting the customer's experience. In order to avoid the above-mentioned problems, in the prior art, either the packaging of the zirconia ceramic blocks is strengthened to avoid damage during transportation, or protective measures are set on the engraving and milling equipment to avoid damage during engraving and milling. These measures are only aimed at one-sided problems and cannot take into account multiple problems at the same time. Summary of the invention

[0003] In view of the existing deficiencies, the present invention provides a zirconium oxide ceramic block for manufacturing artificial teeth.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a zirconia ceramic block for manufacturing dentures, comprising a zirconia ceramic block body, the surface of the zirconia ceramic block body is coated with a protective layer formed by curing a photocurable resin monomer.

[0005] Preferably, a photoinitiator, a defoamer, a light stabilizer and a reactive diluent are added to the photocurable resin monomer during curing, and the weight percentages are as follows: 30-60% of the photocurable resin monomer, 5-10% of the photoinitiator, 0.5-1% of the defoamer, 5-10% of the light stabilizer and 20-45% of the reactive diluent.

[0006] Preferably, the photocurable resin monomer is any one or more of isodecyl acrylate, trimethylolpropane triacrylate, and ethoxylated pentaerythritol tetraacrylate.

[0007] Preferably, the reactive diluent is any one or more of polyethylene glycol diacrylate, diethylene glycol diacrylate, 1,6-hexanediol diacrylate, dipropylene glycol diacrylate, and tripropylene glycol diacrylate.

[0008] Preferably, the photoinitiator is any one or more of bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine, 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylpropiophenone, and benzophenone.

[0009] Preferably, the light stabilizer is any one or more of 4-methoxyphenol, butylated hydroxytoluene, (2,6-di-tert-butyl-4-methylphenol), benzothiazine, and ditridecylthiodipropionate.

[0010] Preferably, the protective layer is coated on the surface of the zirconia ceramic block body by infiltration, coating or spraying.

[0011] Preferably, the zirconia ceramic block body is a ceramic block with a multi-layer structure.

[0012] Preferably, the protective layer is provided with an indicator mark for indicating the number of layers of the zirconia ceramic block body.

[0013] The beneficial effects of the present invention are as follows: the present invention can effectively prevent product damage caused by external force squeezing and bumping during product transportation, and the occurrence of edge damage of the zirconia ceramic block body caused by the loading fixture of the engraving and milling equipment clamping the edge of the zirconia ceramic block body during denture production by coating the protective layer on the zirconia ceramic block body. The invention can provide protection during transportation and engraving and milling processing at the same time, solving the problem that traditional technology cannot take both into account at the same time, and the protective layer can also be removed during engraving and milling fine cutting without affecting the characteristics of the final denture. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of a cross-sectional structure of an embodiment of the present invention;

[0015] Figure 2 Schematic diagram of the external structure of a zirconia ceramic block according to an embodiment of the present invention;

[0016] Names and serial numbers of parts in the figure: 1- zirconia ceramic block body 2- protective layer 20- indication mark. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in conjunction with the accompanying drawings and embodiments below for a clear and complete description. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the present invention, rather than indicating or implying the orientation that the present invention must have, and therefore cannot be understood as limitations on the present invention.

[0018] Embodiments of the present invention Figure 1 As shown in the figure, a zirconia ceramic block for manufacturing dentures includes a zirconia ceramic block body 1. The zirconia ceramic block body 1 is any existing zirconia ceramic block for manufacturing dentures, which can be a single-layer structure or a multi-layer structure. The surface of the zirconia ceramic block body 1 is coated with a protective layer 2 formed by curing a photocurable resin monomer, that is, the zirconia ceramic block body 1 is completely wrapped with a photocurable resin monomer, and then cured under ultraviolet light to form a protective layer 2. At this time, the protective layer 2 is coated on the surface of the zirconia ceramic block body 1 by infiltration, coating or spraying. According to different processes, the photocurable resin monomer is coated on the surface of the zirconia ceramic block body 1 in different ways. The protective layer 2 formed by the photocurable resin monomer has certain elasticity and toughness, and is effective for The zirconia ceramic block body 1 wrapped inside it forms protection, and even if it is affected by external force during transportation, the internal zirconia ceramic block body 1 will not be damaged. When the zirconia ceramic block body 1 is roughly cut by denture carving and milling, the fixture of the carving and milling equipment is clamped on the protective layer 2 at the edge of the zirconia ceramic block body 1, and will not directly contact the zirconia ceramic block body 1, so there is no force directly applied to the zirconia ceramic block body 1. The force is applied to the protective layer 2, which reduces the impact on the zirconia ceramic block body 1. Rough cutting is to cut out a rough blank with a denture shape from the middle of the zirconia ceramic block body 1. At this time, if there is a protective layer 2 on the top and bottom of the rough blank, the protective layer 2 can be removed during fine cutting, and will not affect the manufactured denture. When the zirconia ceramic block body 1 is a ceramic block with a multi-layer structure, since the multi-layer structure of the zirconia ceramic block body 1 is set according to the characteristic change from the crown to the neck of the real tooth, when the zirconia ceramic block body 1 is processed into a denture, it is necessary to distinguish whether the top surface or the bottom surface of the zirconia ceramic block body 1 corresponds to the crown of the real tooth. Figure 2As shown in , the protective layer 2 is provided with an indicator mark 20 for indicating the number of layers of the zirconia ceramic block body 1. The indicator mark 20 can be used for convenient identification and facilitates subsequent processing, such as setting the indicator mark 20 as an indicator arrow.

[0019] For the photocurable resin forming the protective layer, it needs corresponding auxiliary agents to help it cure during photocuring. When curing, photocurable resin is added with photoinitiator, defoamer, light stabilizer and active diluent, which respectively account for the following weight percentages: photocurable resin 30-60%, photoinitiator 5-10%, defoamer 0.5-1%, light stabilizer 5-10%, active diluent 20-45%. The photocurable resin is a composite resin solution composed of any one or more of isodecyl acrylate, trimethylolpropane triacrylate, and ethoxylated pentaerythritol tetraacrylate, and the photoinitiator is any one or more of bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine, 2-hydroxy-2-methyl-1-phenylacetone, 1-hydroxycyclohexylphenylacetone, and benzophenone. The light stabilizer is any one or more of 4-methoxyphenol, butylated hydroxytoluene, (2,6-di-tert-butyl-4-methylphenol), benzothiazine, and ditridecylthiodipropionate. The active diluent is any one or more of polyethylene glycol diacrylate, diethylene glycol diacrylate, 1,6-hexanediol diacrylate, dipropylene glycol diacrylate, and tripropylene glycol diacrylate.

[0020] Embodiment 1:

[0021] Weigh 30 g of trimethylolpropane triacrylate, 10 g of ethoxylated pentaerythritol tetraacrylate, 5 g of 2,4,6-trimethylbenzoyl diphenylphosphine, 0.5 g of defoamer, 6 g of 4-methoxyphenol, and 20 g of polyethylene glycol diacrylate respectively; first pour the trimethylolpropane triacrylate, ethoxylated pentaerythritol tetraacrylate and polyethylene glycol diacrylate into a blender and stir evenly; then pour 2,4,6-trimethylbenzoyl diphenylphosphine, defoamer and 4-methoxyphenol into the blender and stir well to form a light-curable resin composite solution to be used; finally, soak the zirconium oxide ceramic block body in the composite solution and cure it under ultraviolet light.

[0022] Embodiment 2:

[0023] Weigh 30 g of trimethylolpropane triacrylate, 10 g of ethoxylated pentaerythritol tetraacrylate, 5 g of 2-hydroxy-2-methyl-1-phenylacetone, 0.5 g of defoamer, 6 g of ditridecyl thiodipropionate, and 40 g of polyethylene glycol diacrylate respectively; first pour the trimethylolpropane triacrylate, ethoxylated pentaerythritol tetraacrylate and polyethylene glycol diacrylate into a blender and stir evenly; then pour 2,4,6-trimethylbenzoyldiphenylphosphine, defoamer and 4-methoxyphenol into the blender and stir evenly to form a light-curable resin composite solution to be used; finally, spray the composite solution onto the zirconia ceramic block body and cure it under ultraviolet light.

[0024] Embodiment 3:

[0025] Weigh 30 g of trimethylolpropane triacrylate, 15 g of isodecyl acrylate, 5 g of 2,4,6-trimethylbenzoyl diphenylphosphine, 0.5 g of defoamer, 5 g of 4-methoxyphenol, and 30 g of polyethylene glycol diacrylate respectively; first pour the trimethylolpropane triacrylate, isodecyl acrylate and polyethylene glycol diacrylate into a blender and stir evenly; then pour in 2,4,6-trimethylbenzoyl diphenylphosphine, defoamer and 4-methoxyphenol; stir well to form a light-curable resin composite solution to be used; finally, apply the composite solution on the zirconia ceramic block body and cure it under ultraviolet light.

[0026] The zirconia ceramic blocks made in Example 1, Example 2 and Example 3 and the zirconia ceramic block bodies not coated with a protective layer were subjected to simulation tests, one of which was a transportation vibration test simulating actual transportation, and the other was a test of the clamping force during engraving and milling processing. After the transportation vibration test, the maximum vibration amplitude, vibration frequency and vibration time that the zirconia ceramic blocks made in Example 1, Example 2 and Example 3 can withstand are all greater than those of the zirconia ceramic block bodies not coated with a protective layer; in the clamping force test, the maximum clamping force that the zirconia ceramic blocks made in Example 1, Example 2 and Example 3 can withstand is also greater than that of the zirconia ceramic block bodies coated with a protective layer, which proves that the protective layer can effectively protect the zirconia ceramic block bodies during transportation and denture processing.

[0027] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A zirconia ceramic block for manufacturing dentures, characterized in that: The invention comprises a zirconia ceramic block body, the surface of which is covered with a protective layer formed by curing a photocurable resin monomer.

2. The zirconia ceramic block for manufacturing dentures according to claim 1, characterized in that : When the photocurable resin monomer is cured, a photoinitiator, a defoamer, a light stabilizer and a reactive diluent are added, and the weight percentages are as follows: 30-60% of the photocurable resin monomer, 5-10% of the photoinitiator, 0.5-1% of the defoamer, 5-10% of the light stabilizer, and 20-45% of the reactive diluent.

3. The zirconium oxide ceramic block for manufacturing dentures according to claim 1 or 2, characterized in that : The photocurable resin monomer is any one or more of isodecyl acrylate, trimethylolpropane triacrylate, and ethoxylated pentaerythritol tetraacrylate.

4. The zirconia ceramic block for manufacturing dentures according to claim 2, characterized in that : The active diluent is any one or more of polyethylene glycol diacrylate, diethylene glycol diacrylate, 1,6-hexanediol diacrylate, dipropylene glycol diacrylate, and tripropylene glycol diacrylate.

5. The zirconia ceramic block for manufacturing dentures according to claim 2, characterized in that The photoinitiator is any one or more of bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine, 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylpropiophenone, and benzophenone.

6. The zirconia ceramic block for manufacturing dentures according to claim 2, characterized in that : The light stabilizer is any one or more of 4-methoxyphenol, butylated hydroxytoluene, (2,6-di-tert-butyl-4-methylphenol), benzothiazine, and ditridecylthiodipropionate.

7. The zirconia ceramic block for manufacturing dentures according to claim 1, characterized in that The protective layer is coated on the surface of the zirconia ceramic block body by infiltration, coating or spraying.

8. The zirconia ceramic block for manufacturing dentures according to claim 1, characterized in that :The zirconia ceramic block body is a ceramic block with a multi-layer structure.

9. The zirconia ceramic block for manufacturing dentures according to claim 8, characterized in that The protective layer is provided with an indicator mark for indicating the number of layers of the zirconium oxide ceramic block body.

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