Multi-layer fixed structure false tooth

Abstract

The utility model discloses a multi-layer fixed structure false tooth, which comprises a metal substrate, a middle connector and an upper layer dental crown, the metal substrate is connected with implant bases, and the metal substrate is in stable rigid connection with each implant base; the middle connecting body comprises a dental abutment, the dental abutment is made of a polyether-ether-ketone polymer material, the upper dental crown is made of zirconium oxide, the metal substrate is made of a titanium alloy material, the metal base is provided with a metal interface, and the metal substrate part at the metal interface is fixedly connected with the implant abutment through a screw. The multi-layer artificial tooth is reasonable in structural design, combines the advantages of a plurality of materials, has the rigidity of joints, the hardness of the occlusion part and the elasticity of the middle buffer area, and has a good expected effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of dentistry, and particularly relates to a multi-layer fixed structure denture. Background Art

[0002] As a common denture restoration method, implant-supported fixed dentures are widely used clinically. Current implant-supported fixed dentures are usually of a single-layer structure or a two-layer structure. The single-layer structure is usually made of all-ceramic material, which has certain aesthetic effects and strength, but has poor toughness and elastic modulus, so it is prone to breakage and has no buffering effect, thus unable to provide protection for implants. The two-layer structure is usually a metal bottom layer structure plus an upper all-ceramic material layer, and also has insufficient protection for implants due to the lack of good buffering effect. Content of the Utility Model

[0003] To solve the above problems, the utility model provides a multi-layer fixed structure denture.

[0004] The utility model is realized as follows: A multi-layer fixed structure denture includes a metal base, an intermediate connector, and an upper dental crown. The metal base is connected to the implant abutment, and a stable rigid connection is formed between the metal base and each implant abutment. The intermediate connector includes a dental abutment, the material of the dental abutment is polyetheretherketone polymer material, the material of the upper dental crown is zirconia, the metal base is made of titanium alloy, the metal base is provided with a metal interface, and at the metal interface part, the metal base is connected and fixed to the implant abutment by screws.

[0005] The material of the dental abutment is polyetheretherketone polymer material. Polyetheretherketone (PEEK) is a new type of high-performance biopolymer with excellent mechanical strength and elastic modulus. Especially, its biological properties close to those of alveolar bone can relieve chewing stress and reduce the maximum peak load borne by implants, making it an ideal metal substitute in fixed edentulous jaw restoration. Compared with titanium metal, the tensile modulus, tensile strength of PEEK are closer to those of cortical bone; the same is true for the flexural modulus and compressive modulus. However, the properties of PEEK material determine that there are deficiencies in the strength of the interface position and occlusal surface of the prosthesis. Therefore, the utility model adopts a multi-layer structure with a titanium alloy metal base, a polyetheretherketone dental abutment, and a zirconia upper dental crown material, so as to achieve an ideal occlusal force buffer on a rigid and stable structure.

[0006] The intermediate connector further includes a resin gum. The dental abutment made of polyetheretherketone and the resin gum are an integral body and are bonded to the lower metal base to form an integral body.

[0007] The upper dental crown and the dental abutment are bonded to form an integral body.

[0008] The beneficial effects of the present utility model are as follows: The present utility model has a reasonable structural design, adopting a multi-layer structure with a titanium alloy material for the metal base, a polyetheretherketone material for the dental abutment, and a zirconia material for the upper dental crown, realizing an ideal occlusal force buffer on a rigid and stable structure. Combining the advantages of several materials, it has an ideal restoration method with rigidity at the connection, hardness at the occlusal part, and elasticity at the intermediate buffer zone, and has good expected effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present utility model;

[0010] Figure 2 It is a side sectional structural schematic diagram;

[0011] Figure 3 It is a structural schematic diagram of the implant abutment;

[0012] Figure 4 It is a structural schematic diagram of the convex and concave grooves of the implant abutment;

[0013] In the figure: 1 - upper dental crown, 2 - dental abutment, 3 - resin gum, 4 - metal base, 5 - metal interface, 6 - implant abutment, 6-1 - implant, 6-2 - abutment, 6-3 - central hole, 6-4 - convex, 6-5 - concave groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In order to more clearly understand the technical solution of the present utility model, the present utility model will be further described below in conjunction with the drawings.

[0015] As Figures 1-4 shown, a multi-layer fixed structure denture includes a metal base 4, an intermediate connector, and an upper dental crown 1. The metal base 4 is connected to the implant abutment 6, and a stable rigid connection is formed between the metal base 4 and each implant abutment 6. The intermediate connector includes a dental abutment 2, the material of the dental abutment 2 is a polyetheretherketone polymer material, the material of the upper dental crown 1 is zirconia, the metal base 4 is made of titanium alloy material, the metal base 4 is provided with a metal interface 5, and at the metal interface 5 part, the metal base 4 is partially connected and fixed to the implant abutment 6 by screws.

[0016] The described implant abutment consists of an implant body 6-1 implanted into the alveolar bone and an abutment 6-2. Central holes 6-3 are provided at the central positions of both the implant body and the abutment. The implant body is provided with a boss 6-4, and the bottom of the abutment is provided with a groove 6-5 that mates with the boss. When installing the denture, first implant the implant body 6-1 into the alveolar bone of the human body. After a certain period of time, the implant body and the alveolar bone are tightly bonded together, and then the metal base 4 and the abutment 6-2 are firmly fixed to the implant body 6-1 by screws. The intermediate connector further includes a resin gum 3. The dental abutment 2 made of polyetheretherketone and the resin gum are integrated and bonded to the lower metal base 4 to form an integrated body. The upper dental crown 1 and the dental abutment 2 are bonded to form an integrated body.

[0017] The present utility model uses a metal base made of titanium alloy, a dental abutment made of polyetheretherketone, and an upper dental crown made of zirconia, achieving an ideal occlusal force buffer on a rigid and stable structure. Combining the advantages of several materials, it has an ideal restoration method with rigidity at the connection, hardness at the occlusal part, and elasticity at the intermediate buffer zone, and has good expected effects.

[0018] The above description is only a preferred embodiment of the present utility model. Therefore, any equivalent changes or modifications made according to the structures, features, and principles described in the scope of the patent application of the present utility model are included in the scope of the patent application of the present utility model.

Claims

1. A multi-layer fixed structure denture, comprising a metal base, an intermediate connector, and an upper crown, characterized in that: The metal base is connected to the implant base, and a stable rigid connection is formed between the metal base and each implant base; the intermediate connector includes a dental base, the dental base is made of polyetheretherketone polymer material, the upper crown is made of zirconium oxide, the metal base is made of titanium alloy, and the metal base is provided with a metal interface. At the metal interface, the metal base part is connected and fixed to the implant base by screws.

2. The multi-layer fixed structure denture according to claim 1, characterized in that: The intermediate connector also includes a resin gum. The dental base made of polyetheretherketone is integrated with the resin gum and is bonded to the lower metal base to form a whole.

3. The multi-layer fixed structure denture according to claim 2, characterized in that: The upper crown and the tooth base are bonded into a whole.

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