Zirconia porcelain block for manufacturing a denture

Abstract

This invention relates to a zirconia ceramic block for manufacturing dentures, comprising a zirconia ceramic block body with a protective layer formed by curing a light-curing resin monomer on its surface. This invention utilizes the protective layer to solve the problem of damage to the zirconia ceramic block body during transportation and denture processing.

Description

Technical Field

[0001] This invention relates to the field of dentures, and in particular to a zirconia ceramic block for manufacturing dentures. Background Technology

[0002] Dentures, also known as false teeth, utilize zirconia ceramic blocks to effectively mimic the color and translucency of natural teeth. Zirconia ceramic blocks are characterized by their high hardness, wear resistance, and aesthetic appeal. Thanks to their excellent physicochemical properties, stable biocompatibility, and good aesthetic restorative effects, zirconia ceramic blocks have rapidly gained global popularity as a material for denture manufacturing. The manufacturing process involves clamping the edges of the zirconia ceramic block onto a milling machine, then rough-cutting the center of the block to create a rough blank, which is then precision-cut to finalize the denture. However, zirconia ceramic blocks are susceptible to chipping and cracking during transportation and rough-cutting, damaging the product and affecting the customer experience. To avoid these problems, existing technologies either reinforce the packaging of the zirconia ceramic blocks to prevent damage during transportation or incorporate protective measures on the milling machine to prevent damage during milling. These measures only address one aspect of the problem and cannot simultaneously address multiple issues. Summary of the Invention

[0003] To address the shortcomings of existing methods, this invention provides a zirconia ceramic block for manufacturing dentures.

[0004] The technical solution adopted by this invention to solve its technical problem is: a zirconia ceramic block for manufacturing dentures, comprising a zirconia ceramic block body, the surface of which is coated with a protective layer formed by curing a light-curing resin monomer; the protective layer is formed by coating the surface of the zirconia ceramic block body with a light-curing resin composite solution by impregnation, coating or spraying and curing under ultraviolet light irradiation; the light-curing resin composite solution comprises the following components in weight percentage: 30-60% light-curing resin monomer, 5-10% photoinitiator, 0.5-1% defoamer, 5-10% light stabilizer, and 20-45% reactive diluent; the light-curing resin monomer is any one or more of isodecanyl acrylate, trimethylolpropane triacrylate, and pentaerythritol tetraacrylate; the photoinitiator, defoamer, light stabilizer and reactive diluent are added during the curing of the light-curing resin monomer, the reactive diluent being polyethylene glycol diacrylate, diethylene glycol diacrylate, and 1 The light initiator is any one or more of 6-hexanediol diacrylate, dipropylene glycol diacrylate, and tripropylene glycol diacrylate; the photoinitiator is any one or more of bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2,4,6-trimethylbenzoyl diphenylphosphine, 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylphenylpropanone, and benzophenone; the light stabilizer is any one or more of 4-methoxyphenol, butylated hydroxytoluene, (2,6-di-tert-butyl-4-methylphenol), benzothiazine, and ditridecyl thiodipropionate.

[0005] Preferably, the zirconia ceramic block body is a ceramic block with a multi-layer structure.

[0006] Preferably, the protective layer is provided with an indicator mark for indicating the number of layers of the zirconia ceramic block body.

[0007] The beneficial effects of this invention are as follows: by covering the zirconia ceramic block body with a protective layer, this invention can effectively prevent product damage caused by external pressure and impact during product transportation, as well as edge chipping damage caused by the clamping of the zirconia ceramic block body by the milling equipment during denture manufacturing. It can provide protection during transportation and milling processing at the same time, solving the problem that traditional technologies cannot take both into account at the same time. Moreover, the protective layer can be removed during milling and precision cutting without affecting the characteristics of the final denture. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the cross-sectional structure of an embodiment of the present invention;

[0009] Figure 2 This is a schematic diagram of the external structure of the zirconia ceramic block according to an embodiment of the present invention;

[0010] The names and serial numbers of the components in the picture are: 1-Zirconium oxide ceramic block body; 2-Protective layer; 20-Indicator markings. Detailed Implementation

[0011] To more clearly illustrate the purpose, technical solutions, and advantages of the embodiments of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, providing a clear and complete description. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. Furthermore, directional terms mentioned in the present invention, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are merely for reference to the directions shown in the accompanying drawings. The use of directional terms is for better and clearer explanation and understanding of the present invention, and is not intended to indicate or imply any necessary orientation of the present invention; therefore, it should not be construed as a limitation of the present invention.

[0012] Examples of embodiments of the present invention Figure 1As shown, 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 used for dentures, and can be a single-layer or multi-layer structure. The surface of the zirconia ceramic block body 1 is covered with a protective layer 2 formed by curing a light-cured resin monomer. That is, the zirconia ceramic block body 1 is completely encapsulated by the light-cured resin monomer, and then cured under ultraviolet light to form the protective layer 2. The protective layer 2 is applied to the surface of the zirconia ceramic block body 1 by impregnation, coating, or spraying. Depending on the process, different methods are used to coat the surface of the zirconia ceramic block body 1. The protective layer 2 formed by the light-cured resin monomer has a certain degree of elasticity and toughness. The zirconia ceramic block 1 encased inside provides protection, preventing damage to the internal zirconia ceramic block 1 even under external force during transportation. During the rough cutting of the zirconia ceramic block 1 for denture carving, the clamp of the carving and milling equipment is held on the protective layer 2 at the edge of the zirconia ceramic block 1, without direct contact with the zirconia ceramic block 1. Therefore, no force is directly applied to the zirconia ceramic block 1; the force is applied to the protective layer 2, reducing the impact on the zirconia ceramic block 1. The rough cutting involves cutting a rough blank with a denture shape from the middle of the zirconia ceramic block 1. If the protective layer 2 is present at the top and bottom of the rough blank, it can be removed during the fine cutting without affecting the finished denture. When the zirconia ceramic block body 1 is a multi-layered ceramic block, since the multi-layered zirconia ceramic block body 1 is designed based on the characteristic changes from the crown to the neck of a real tooth, when processing the zirconia ceramic block body 1 into a denture, it is necessary to determine whether the top or bottom surface of the zirconia ceramic block body 1 corresponds to the crown of the real tooth. At this time, if... Figure 2 As shown, 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 to easily identify the layers and facilitate subsequent processing. For example, the indicator mark 20 can be set as an indicator arrow.

[0013] For photocurable resins that form a protective layer, appropriate auxiliary agents are needed to aid in curing during photocuring. These include photoinitiators, defoamers, light stabilizers, and reactive diluents, with the following weight percentages: photocurable resin 30-60%, photoinitiator 5-10%, defoamer 0.5-1%, light stabilizer 5-10%, and reactive diluent 20-45%. The photocurable resin is a composite resin solution composed of one or more resins selected from isodecyl acrylate, trimethylolpropane triacrylate, and pentaerythritol tetraacrylate. The photoinitiator is one or more selected from bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2,4,6-trimethylbenzoyl diphenylphosphine, 2-hydroxy-2-methyl-1-phenylpropanone, 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 ditridecyl thiodipropionate. 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.

[0014] Example 1:

[0015] Weigh out 30g of trimethylolpropane triacrylate, 10g of pentaerythritol tetraacrylate ethoxylate, 5g of 2,4,6-trimethylbenzoyl diphenylphosphine, 0.5g of defoamer, 6g of 4-methoxyphenol, and 20g of polyethylene glycol diacrylate. First, pour the trimethylolpropane triacrylate, pentaerythritol tetraacrylate ethoxylate, and polyethylene glycol diacrylate into a stirrer and stir evenly. Then, add 2,4,6-trimethylbenzoyl diphenylphosphine, defoamer, and 4-methoxyphenol and stir thoroughly to form a photocurable resin composite solution. Finally, immerse the zirconia ceramic block in the composite solution and cure it under ultraviolet light.

[0016] Example 2:

[0017] Weigh out 30g of trimethylolpropane triacrylate, 10g of pentaerythritol tetraacrylate ethoxylate, 5g of 2-hydroxy-2-methyl-1-phenylpropanone, 0.5g of defoamer, 6g of ditridecyl thiodipropionate, and 40g of polyethylene glycol diacrylate. First, pour the trimethylolpropane triacrylate, pentaerythritol tetraacrylate, and polyethylene glycol diacrylate into a mixer and stir evenly. Then, add 2,4,6-trimethylbenzoyl diphenylphosphine, the defoamer, and 4-methoxyphenol and stir thoroughly to form a photocurable resin composite solution. Finally, spray the composite solution onto the zirconia ceramic block and cure it under ultraviolet light.

[0018] Example 3:

[0019] Weigh out 30g of trimethylolpropane triacrylate, 15g of isodecyl acrylate, 5g of 2,4,6-trimethylbenzoyl diphenylphosphine, 0.5g of defoamer, 5g of 4-methoxyphenol, and 30g of polyethylene glycol diacrylate. First, pour the trimethylolpropane triacrylate, isodecyl acrylate, and polyethylene glycol diacrylate into a mixer and stir until homogeneous. Then, add the 2,4,6-trimethylbenzoyl diphenylphosphine, defoamer, and 4-methoxyphenol and stir thoroughly to form a photocurable resin composite solution. Finally, apply the composite solution to the zirconia ceramic block and cure it under ultraviolet light.

[0020] The zirconia ceramic blocks prepared in Examples 1, 2, and 3, as well as the uncoated zirconia ceramic block body, were subjected to simulated tests. One test simulated the vibration during actual transportation, and the other tested the clamping force during milling. After the transportation vibration test, the maximum vibration amplitude, vibration frequency, and vibration time that the zirconia ceramic blocks prepared in Examples 1, 2, and 3 could withstand were all greater than those of the uncoated zirconia ceramic block body. In the clamping force test, the maximum clamping force that the zirconia ceramic blocks prepared in Examples 1, 2, and 3 could withstand was also greater than that of the zirconia ceramic block body with the protective layer. This proves that the protective layer can effectively protect the zirconia ceramic block body during transportation and denture processing.

[0021] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within 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 coated with a protective layer formed by curing a photocurable resin monomer. The protective layer is formed by coating the surface of the zirconia ceramic block body with a photocurable resin composite solution through impregnation, application, or spraying, followed by curing under ultraviolet light. The photocurable resin composite solution comprises the following components by weight percentage: 30-60% photocurable resin monomer, 5-10% photoinitiator, 0.5-1% defoamer, 5-10% light stabilizer, and 20-45% reactive diluent. The photocurable resin monomer is any one or more of isodecyl acrylate, trimethylolpropane triacrylate, and pentaerythritol tetraacrylate. During the curing of the photocurable resin monomer, a photoinitiator, defoamer, light stabilizer, and reactive diluent are added. 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. The photoinitiator is bis(2,4) The light stabilizer is any one or more of (6-trimethylbenzoyl)phenylphosphine oxide, 2,4,6-trimethylbenzoyl diphenylphosphine, and 2-hydroxy-2-methyl-1-phenylpropanone; the light stabilizer is any one or more of 4-methoxyphenol, butylated hydroxytoluene, (2,6-di-tert-butyl-4-methylphenol), and ditridecyl thiodipropionate.

2. 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.

3. The zirconia ceramic block for manufacturing dentures according to claim 2, characterized in that... The protective layer is provided with an indicator mark to indicate the number of layers of the zirconia ceramic block body.

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