Photocured composite resin dental inlay

Abstract

This application relates to the field of dental restorative materials technology and discloses a light-cured composite resin inlay, comprising an inlay body, an elastic transition layer, an adhesive layer, and a surface treatment layer. This light-cured composite resin inlay, through the use of a high-strength composite resin inlay body and a reinforcing fiber network, effectively disperses the internal stress generated by the composite resin during light curing. Subsequently, a silane coupling agent enhances the bonding force between the reinforcing fiber network and the high-strength composite resin, thereby increasing the overall strength of the inlay body, reducing the risk of restoration damage due to stress concentration, and lowering the possibility of gaps caused by volume shrinkage. This improves the fit between the restoration and the tooth structure. The inlay body is formed in one step using light-curing technology, ensuring the overall structural strength and performance consistency of the inlay body, while also improving production efficiency and reducing production costs.

Description

Technical Field

[0001] This application relates to the field of dental restorative materials technology, specifically to a light-cured composite resin inlay. Background Technology

[0002] The development of dental restorative materials has always been closely related to clinical needs and innovations in materials science and technology. In recent years, with the significant increase in people's requirements for oral health and aesthetics, and the rapid progress of digital technology and nanomaterials science, dental restorative materials are developing towards precision, functionality, and biomimicry. Traditional metal inlays and all-ceramic inlays, with their respective performance characteristics, have long occupied the mainstream market for dental inlay restorations.

[0003] Currently, there are several main approaches to dental inlay restoration. Among them, metal inlays, usually made of gold alloys or cobalt-chromium alloys, have high mechanical strength, but poor aesthetics and may cause allergic reactions. Next, all-ceramic inlays, such as zirconia or glass-ceramic inlays, have good aesthetic performance and biocompatibility, but are brittle and have high processing costs. Finally, composite resin inlays are made by indirect methods and then bonded for restoration, which is relatively complex to operate and the long-term durability needs to be improved.

[0004] Currently, the application of light-cured composite resin in dental restorations is mainly focused on direct filling. However, during direct filling, the composite resin generates internal stress due to volume shrinkage during the light curing process, which leads to gaps between the restoration and the tooth structure, affecting the fit of the restoration. At the same time, shrinkage can easily cause marginal microleakage. Shrinkage gaps can easily lead to bacterial invasion and saliva penetration, resulting in marginal microleakage, which may in turn cause complications such as secondary caries and pulpitis. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a light-cured composite resin dental inlay, which has the advantages of improving the overall strength of the inlay body, reducing the risk of restoration damage due to stress concentration, reducing the possibility of gaps caused by volume shrinkage, and improving the fit between the restoration and the tooth structure, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a light-cured composite resin dental inlay, comprising an inlay body, an elastic transition layer, an adhesive layer, and a surface treatment layer, wherein the inlay body, the elastic transition layer, the adhesive layer, and the surface treatment layer are arranged sequentially from the inside to the outside; the inlay body is made of high-strength composite resin material, and a reinforcing fiber network is provided inside the inlay body; the surface of the reinforcing fiber network is filled with a silane coupling agent; the elastic transition layer includes an elastic interface agent and is composed of an elastic interface agent; the adhesive layer is composed of a self-etching resin adhesive; and the surface treatment layer is composed of a nano-zirconia polishing coating.

[0007] Through the above scheme, by setting the dental inlay body of high-strength composite resin material and the role of reinforcing fiber network, the reinforcing fiber network can effectively disperse the internal stress generated by the composite resin during light curing. Then, the silane coupling agent enhances the bonding force between the reinforcing fiber network and the high-strength composite resin, thereby improving the overall strength of the dental inlay body, reducing the risk of restoration damage caused by stress concentration, reducing the possibility of gaps caused by volume shrinkage, and improving the fit between the restoration and the tooth tissue.

[0008] Furthermore, the reinforcing fiber network is made of silanized glass-ceramic fiber.

[0009] Through the above scheme, the reinforcing fiber network adopts silanized glass ceramic fiber, which has good mechanical properties and chemical stability, further improving the strength and toughness of the reinforcing fiber network. This allows for better stress distribution, reduces deformation of the inlay body, ensures the durability of the restoration effect, and also more effectively suppresses gaps caused by internal stress.

[0010] Furthermore, the dental inlay body also includes BISGMA resin, and the high-strength composite resin material is composed of the BISGMA resin.

[0011] Through the above-mentioned scheme, the BISGMA resin has excellent physical and mechanical properties, which can provide good hardness, wear resistance and flexural strength for the dental inlay body, making the dental inlay less prone to wear and breakage in daily use, extending the service life of the dental inlay, and its properties help to reduce volume shrinkage during the light curing process and reduce internal stress.

[0012] Furthermore, the BISGMA resin is filled with an appropriate proportion of UDMA resin, and the BISGMA resin is doped with an appropriate proportion of silica nanofiller.

[0013] Through the above scheme, by setting the effects of UDMA resin and silica nanofiller, UDMA resin can improve the polymerization shrinkage performance of BISGMA resin, and silica nanofiller can enhance the hardness and wear resistance of the resin. The two work synergistically to further optimize the performance of the dental inlay body, reduce the internal stress caused by volume shrinkage, and improve the quality and durability of the restoration.

[0014] Furthermore, the bottom of the dental inlay body is provided with multiple grooves, which are arranged in a honeycomb pattern.

[0015] The honeycomb-shaped grooves increase the contact area between the inlay body and the tooth structure. When bonded through the adhesive layer, the bond is stronger, enhancing the adhesion between the inlay and the tooth structure, reducing the risk of restoration detachment, and also helping to disperse stress and prevent stress concentration in local areas from causing gaps.

[0016] Furthermore, the elastic interface agent is made of polyurethane acrylate.

[0017] The above-mentioned elastic interface agent uses polyurethane acrylate, which has good elasticity and flexibility. The elastic transition layer can effectively buffer the stress generated by the volume shrinkage of the inlay body during the light curing process, so that the stress will not directly act on the interface between the tooth tissue and the restoration, reducing the risk of marginal microleakage caused by stress and improving the sealing and stability of the restoration.

[0018] Furthermore, the adhesive layer comprises methacrylate monomers, the self-etching resin adhesive is composed of the methacrylate monomers, and the methacrylate monomers are incorporating an appropriate proportion of photoinitiators.

[0019] Through the above scheme, the photoinitiator enables the methacrylate monomer to rapidly polymerize under light, forming a strong adhesive layer, ensuring that the inlay is tightly bonded to the tooth structure, effectively preventing bacterial invasion and saliva penetration, and reducing the probability of marginal microleakage and complications such as secondary caries and pulpitis.

[0020] Furthermore, the dental inlay body is formed in one step using light curing technology.

[0021] Through the above scheme, the dental inlay body is formed in one step by light curing technology, which reduces the errors and quality instability factors that may be caused by multi-step processing, ensures the overall structural strength and performance consistency of the dental inlay body, improves production efficiency, reduces production costs, and provides reliable and cost-effective dental inlay restorations for clinical applications.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This light-cured composite resin inlay utilizes a high-strength composite resin body and a reinforcing fiber network. The reinforcing fiber network effectively disperses the internal stress generated by the composite resin during light curing. Subsequently, a silane coupling agent enhances the bonding force between the reinforcing fiber network and the high-strength composite resin, thereby increasing the overall strength of the inlay body. This reduces the risk of restoration damage due to stress concentration and lowers the possibility of gaps caused by volume shrinkage, improving the fit between the restoration and the tooth structure. The inlay body is formed in one step using light curing technology, reducing errors and quality instability that may arise from multi-step processing. This ensures the overall structural strength and performance consistency of the inlay body, while also improving production efficiency and reducing production costs. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the entire application;

[0025] Figure 2 This is a three-dimensional structural diagram of the bottom of the entire application;

[0026] Figure 3 This is a schematic diagram of the overall internal structure of this application;

[0027] Figure 4 This is a three-dimensional structural diagram of the dental inlay body of this application;

[0028] Figure 5 This is a three-dimensional structural diagram of the adhesive layer in this application.

[0029] In the picture:

[0030] 1. Dental inlay body; 101. Reinforcing fiber network; 102. Silane coupling agent; 103. BISGMA resin; 104. UDMA resin; 105. Silica nanofiller; 106. Groove; 2. Elastic transition layer; 201. Elastic interface agent; 3. Adhesive layer; 301. Methacrylate monomer; 302. Photoinitiator; 4. Surface treatment layer. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 2 and Figure 3This embodiment of a light-cured composite resin dental inlay includes an inlay body 1, an elastic transition layer 2, an adhesive layer 3, and a surface treatment layer 4. The inlay body 1, elastic transition layer 2, adhesive layer 3, and surface treatment layer 4 are arranged sequentially from the inside out. The inlay body 1 is made of high-strength composite resin material. A reinforcing fiber network 101 is provided inside the inlay body 1. The surface of the reinforcing fiber network 101 is filled with a silane coupling agent 102. The reinforcing fiber network 101 can effectively disperse the internal stress generated by the composite resin during the light-curing process. Subsequently, the silane coupling agent 102 enhances the bonding force between the reinforcing fiber network 101 and the high-strength composite resin, making the inlay body 1... The overall strength is improved, reducing the risk of restoration damage caused by stress concentration. The inlay body 1 is formed in one step using light-curing technology. The above-mentioned one-step molding of the inlay body 1 by light-curing technology reduces the errors and quality instability factors that may be caused by multi-step processing, ensuring the overall structural strength and performance consistency of the inlay body 1. At the same time, it improves production efficiency and reduces production costs, providing reliable and cost-effective inlay restorations for clinical applications. The elastic transition layer 2 includes an elastic interface agent 201. The elastic transition layer 2 is composed of the elastic interface agent 201. The adhesive layer 3 is composed of a self-etching resin adhesive. The surface treatment layer 4 is composed of a nano-zirconia polishing coating.

[0033] The reinforcing fiber network 101 is made of silanized glass ceramic fiber. This material has good mechanical properties and chemical stability, which further improves the strength and toughness of the reinforcing fiber network 101. This allows for better stress distribution, reduces deformation of the inlay body 1, and ensures the durability of the restorative effect. It can also more effectively suppress gaps caused by internal stress. The inlay body 1 also includes BISGMA resin 103. The high-strength composite resin material is composed of BISGMA resin 103. The BISGMA resin 103 has excellent physical and mechanical properties, which can provide the inlay body 1 with good hardness, wear resistance, and flexural strength. This makes the inlay less prone to wear and breakage in daily use, extending the service life of the inlay. Its properties also help reduce volume shrinkage during the light curing process and reduce internal stress.

[0034] The BISGMA resin 103 is internally filled with an appropriate proportion of UDMA resin 104 and incorporates an appropriate proportion of silica nanofiller 105. Through the interaction of UDMA resin 104 and silica nanofiller 105, UDMA resin 104 improves the polymerization shrinkage properties of BISGMA resin 103, while silica nanofiller 105 enhances the hardness and wear resistance of the resin. Their synergistic effect further optimizes the performance of the inlay body 1, reduces internal stress caused by volume shrinkage, and improves the quality and durability of the restoration. The bottom of the inlay body 1 has multiple grooves 106 arranged in a honeycomb pattern. This honeycomb arrangement increases the contact area between the inlay body 1 and the tooth structure, making the bond stronger when bonded through the adhesive layer 3. This enhances the adhesion between the inlay and the tooth structure, reduces the risk of restoration detachment, and also helps to disperse stress, preventing stress concentration in certain areas that could lead to gaps.

[0035] The elastic interface agent 201 is made of polyurethane acrylate, which has good elasticity and flexibility. The elastic transition layer 2 can effectively buffer the stress generated by the volume shrinkage of the inlay body 1 during the light curing process, so that the stress will not directly act on the interface between the tooth tissue and the restoration, reducing the risk of marginal microleakage caused by stress and improving the sealing and stability of the restoration. The adhesive layer 3 includes methacrylate monomer 301. The self-etching resin adhesive is composed of methacrylate monomer 301. The methacrylate monomer 301 contains an appropriate proportion of photoinitiator 302. The photoinitiator 302 causes the methacrylate monomer 301 to polymerize rapidly under light irradiation to form a strong adhesive layer 3, ensuring that the inlay is tightly bonded to the tooth tissue, effectively preventing bacterial invasion and saliva penetration, and reducing the probability of marginal microleakage and complications such as secondary caries and pulpitis.

[0036] This embodiment of a light-cured composite resin inlay utilizes a high-strength composite resin inlay body 1 and a reinforcing fiber network 101. The reinforcing fiber network 101 effectively disperses the internal stress generated by the composite resin during the light-curing process. Subsequently, a silane coupling agent 102 enhances the bonding force between the reinforcing fiber network 101 and the high-strength composite resin, thereby increasing the overall strength of the inlay body 1. This reduces the risk of restoration damage due to stress concentration and also lowers the possibility of gaps caused by volume shrinkage, improving the fit between the restoration and the tooth structure. The inlay body 1 is formed in one step using light-curing technology, reducing errors and quality instability factors that may arise from multi-step processing. This ensures the overall structural strength and performance consistency of the inlay body 1, while also improving production efficiency and reducing production costs.

[0037] It should be noted that the shape of the inlay body 1 matches the tooth defect, which can accurately fit the tooth tissue and avoid gaps between the restoration and the tooth due to shape mismatch, thus effectively improving the fit and tightness of the restoration.

[0038] The working principle of the above embodiment is as follows: When using this light-cured composite resin inlay for dental restoration, the surface of the tooth tissue is first pretreated using a self-etching resin adhesive, namely adhesive layer 3, composed of methacrylate monomer 301 and photoinitiator 302. Under light irradiation, the photoinitiator 302 causes the methacrylate monomer 301 to polymerize rapidly, firmly bonding the inlay to the tooth tissue. Then, the inlay body 1 is made of high-strength composite resin material, and the internal reinforcing fiber network 101 disperses the internal stress generated during the light curing process. At the same time, the silane coupling agent 102 enhances its bonding force with the resin. Secondly, BISGMA resin 103 provides the basic material. To improve mechanical properties, UDMA resin 104 and silica nanofiller 105 are further optimized to reduce volume shrinkage. Then, the groove 106 at the bottom of the inlay body 1 increases the contact area and enhances the bonding strength. Next, the elastic transition layer 2 is composed of an elastic interface agent 201 made of polyurethane acrylate, whose good elasticity can buffer stress and reduce the risk of marginal microleakage. Finally, the inlay body 1 is formed in one step by light curing technology to ensure overall performance stability. The synergistic effect of each part effectively solves the problems of stress, gaps, and marginal microleakage caused by volume shrinkage when directly filling with traditional light-cured composite resin, thus improving the quality and effect of dental restoration.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0040] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A light-cured composite resin dental inlay, comprising an inlay body (1), an elastic transition layer (2), an adhesive layer (3), and a surface treatment layer (4), characterized in that: The inlay body (1), the elastic transition layer (2), the adhesive layer (3) and the surface treatment layer (4) are arranged sequentially from the inside to the outside. The inlay body (1) is made of high-strength composite resin material. The interior of the inlay body (1) is provided with a reinforcing fiber network (101). The surface of the reinforcing fiber network (101) is filled with a silane coupling agent (102). The elastic transition layer (2) includes an elastic interface agent (201). The elastic transition layer (2) is composed of an elastic interface agent (201). The adhesive layer (3) is composed of a self-etching resin adhesive. The surface treatment layer (4) is composed of a nano-zirconia polishing coating.

2. The light-cured composite resin dental inlay according to claim 1, characterized in that: The reinforcing fiber network (101) is made of silanized glass ceramic fiber.

3. The light-cured composite resin dental inlay according to claim 1, characterized in that: The dental inlay body (1) also includes BISGMA resin (103), and the high-strength composite resin material is composed of the BISGMA resin (103).

4. The light-cured composite resin dental inlay according to claim 3, characterized in that: The BISGMA resin (103) is filled with an appropriate proportion of UDMA resin (104), and the BISGMA resin (103) is doped with an appropriate proportion of silica nanofiller (105).

5. A light-cured composite resin dental inlay according to claim 3, characterized in that: The bottom of the dental inlay body (1) is provided with a plurality of grooves (106), which are arranged in a honeycomb pattern.

6. The light-cured composite resin dental inlay according to claim 1, characterized in that: The elastic interface agent (201) is made of polyurethane acrylate.

7. The light-cured composite resin dental inlay according to claim 1, characterized in that: The adhesive layer (3) includes a methacrylate monomer (301), and the self-etching resin adhesive is composed of the methacrylate monomer (301). The methacrylate monomer (301) contains an appropriate proportion of photoinitiator (302).

8. The light-cured composite resin dental inlay according to claim 1, characterized in that: The dental inlay body (1) is formed in one step by light curing technology.

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