Dental implant and method for manufacturing the same

Abstract

The present invention discloses a dental implant and a method for manufacturing the dental implant, comprising an implant, a fixing screw, a fixing base, and a treatment cap. The implant comprises an end and a cone. By arranging the implant as an end and a cone connected up and down, arranging an external thread on the cone, and dividing the external thread into a first pore area with a first pore and a second pore area with a second pore, this arrangement enables the implant to be arranged as a through-hole first pore area when combined with bone tissue, so as to facilitate combination with compact bone tissue, and to be arranged as a blind-hole second pore area, so as to facilitate combination with cancellous bone tissue, so as to optimize the elastic modulus of the implant, thereby improving the bone bonding performance of the dental implant, and achieving appropriate strength, while making the stress shielding smaller and the biomechanical performance good, thereby solving the problems of poor bone bonding performance and large stress shielding of the existing dental implant.

Description

Technical Field

[0001] The present invention belongs to the technical field of oral implantation, and in particular relates to a dental implant and a method for manufacturing the dental implant. Background Art

[0002] Due to the poor fixation of traditional treatment methods for complete dentures, implant-retained / supported overdentures have been gradually replaced. Seeking ideal bone integration is a development direction of oral implantology today.

[0003] At present, pure titanium and its alloys are the dominant implant materials in clinical practice. However, the chemical composition of titanium is completely different from that of natural bone tissue. The elastic modulus of pure titanium is 102-108GPa, that of titanium alloy (Ti6Al4V) is 110-120GPa, and that of human bone tissue is only 1.37-15GPa.

[0004] The elastic modulus ratio of pure titanium and its alloy materials to bone tissue is as high as dozens of times. Therefore, stress shielding will be generated after implantation into the human body, causing bone stress absorption around the implant, and eventually leading to loosening and fracture of the implant. Studies have shown that more than 50% of "stress shielding" will significantly inhibit the proliferation of osteoblasts and stimulate their death.

[0005] After the implant is placed, the first thing that osteoblasts bind to is the implant surface. People generally believe that a rough surface is more conducive to osteoblast binding than a smooth surface. However, in fact, this surface morphology increases the contact area between the material surface and the tissue. At the same time, tiny cracks are easily generated during the preparation of the rough surface, resulting in stress concentration and reducing the wear resistance and fatigue resistance of the material. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a dental implant and a method for manufacturing the dental implant, so as to solve the problems of poor bone integration performance and large stress shielding of the existing dental implant.

[0007] To solve the above problems, the technical solution of the present invention is:

[0008] A dental implant of the present invention is characterized by comprising an implant, a fixing screw, a fixing base, and a treatment cap;

[0009] The implant comprises an end portion and a cone portion; the upper end of the cone portion is connected to the lower end of the end portion; the lower base diameter of the cone portion is smaller than the upper base diameter; and the outer surface of the cone portion is provided with an external thread;

[0010] The external thread is provided with a first pore area and a second pore area from bottom to top; a plurality of first pores are provided in the first pore area, and the first pores are through holes; a plurality of second pores are provided in the second pore area, and the second pores are blind holes;

[0011] The upper end of the implant formed by the cooperation between the end portion and the cone portion has an accommodation space;

[0012] The lower end of the fixed base is installed in the accommodating space; the fixed base is provided with an internal thread, and the internal thread extends to the implant;

[0013] The fixing screw is threadably connected to the fixing base and the implant through the internal thread;

[0014] The treatment cap is fixedly connected to the upper end of the fixing screw;

[0015] A magnetic attraction component is arranged inside the treatment cap.

[0016] In the dental implant of the present invention, the slope of the outer surface of the cone portion is 4° to 6°, the upper base diameter is 4.4 mm±0.02 mm, and the lower base diameter is 2.8 mm±0.02 mm.

[0017] In the dental implant of the present invention, the pore diameter of the first pore is 0.3 mm±0.02 mm; the pore diameter of the second pore is 0.3 mm±0.02 mm, and the pore depth of the second pore is 1.0 mm±0.02 mm.

[0018] In the dental implant of the present invention, a plurality of the first pores are arranged in a circular array in the first pore area; and a plurality of the second pores are arranged in a circular array in the second pore area.

[0019] The dental implant of the present invention has a pitch of the external thread of 0.8 mm±0.02 mm.

[0020] In the dental implant of the present invention, the treatment cap and the fixing screw are fixedly connected via a connecting screw.

[0021] The dental implant of the present invention is integrally formed by metal additive manufacturing technology, and the material of the implant is titanium.

[0022] The dental implant of the present invention, the material of the treatment cap is XM27.

[0023] In the dental implant of the present invention, the magnetic attraction component is a magnet, the material of the magnet is AlNiCo, and the magnet is sealed in the treatment cap by welding.

[0024] A method for manufacturing a dental implant of the present invention is used to manufacture any of the above-mentioned dental implants, and the specific steps are as follows:

[0025] S1: Using the DICOM modeling method, the edentulous mandible was photographed using CT technology to obtain the corresponding CT data, and then the first three-dimensional finite element model including the edentulous mandible, mucosa and denture was established using the medical imaging software Minics, the reverse engineering software Geomagic and the three-dimensional design software SolidWorks;

[0026] S2: Based on the dental implant drawings, the various parts of the dental implant 3D model are established in SolidWorks and assembled to form a second 3D finite element model of the dental implant;

[0027] S3: Assembling the first three-dimensional finite element model in step S1 and the second three-dimensional finite element model in step S2 to obtain a desired third three-dimensional finite element model;

[0028] S4: performing finite element analysis on the dental implant using ANSYS, adding material properties to the third three-dimensional finite element model, adding different loads to simulate different actual situations, calculating and analyzing the biomechanical properties of the implant, analyzing the corresponding results of the dental implant, and adjusting various parameters of the implant according to the simulation results of the finite element analysis, so that the dental implant meets the required strength requirements;

[0029] S5: Print out the finished dental implant product by using selective laser melting 3D printing technology, and process, clean and disinfect the finished dental implant product.

[0030] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0031] In one embodiment of the present invention, an implant is configured with an upper and lower connected end portion and a cone portion, an external thread is configured on the cone portion, and the external thread is divided into a first pore area with a first pore and a second pore area with a second pore, and the first pore is a through hole and the second pore is a blind hole. This configuration allows the implant to be configured with the first pore area as a through hole when combined with bone tissue, which is convenient for combining with compact bone tissue, and the second pore area as a blind hole, which is convenient for combining with cancellous bone tissue, so as to optimize the elastic modulus of the implant, thereby improving the bone bonding performance of the dental implant, providing appropriate strength, reducing stress shielding, and achieving good biomechanical properties, thereby solving the problems of poor bone bonding performance and large stress shielding of existing dental implants. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cross-sectional view of a dental implant of the present invention;

[0033] Figure 2 is a schematic diagram of a dental implant of the present invention;

[0034] Figure 3 It is a schematic diagram of the bone-integrated structure of the dental implant after implantation of the present invention;

[0035] Figure 4 It is an enlarged cross-sectional view of the bone-integrated structure of the dental implant of the present invention after implantation.

[0036] Explanation of the reference numerals: 11: magnetic attraction part; 12: treatment cap; 13: fixing screw; 14: fixing base; 15: implant; 16: external thread; 17: first pore area; 18: second pore area. DETAILED DESCRIPTION

[0037] The following is a further detailed description of a dental implant and a method for manufacturing a dental implant proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

[0038] Embodiment 1

[0039] See also Figures 1 to 4 In one embodiment, a dental implant includes an implant 15 , a fixing screw 13 , a fixing base 14 , and a treatment cap 12 .

[0040] The implant 15 includes an end portion and a cone portion. The upper end of the cone portion is connected to the lower end of the end portion. The lower base diameter of the cone portion is smaller than the upper base diameter. An external thread 16 is provided on the outer surface of the cone portion. The external thread 16 is provided with a first pore area 17 and a second pore area 18 from bottom to top. A plurality of first pores are provided in the first pore area 17, and a second pore is provided in the second pore area 18. The first pore is a through hole, and the second pore is a blind hole.

[0041] The upper end of the implant 15 formed by the end and the cone is provided with a receiving space. The lower end of the fixed base 14 is installed in the receiving space. The fixed base 14 is provided with an internal thread, and the internal thread extends to the implant 15. The fixed base 14 is used to plasticize the tooth tissue so as to support the treatment cap 12.

[0042] The fixing screw 13 is threadedly connected to the fixing base 14 and the implant 15 through an internal thread, and fixes the fixing base 14 on the implant 15 so that the fixing base 14 does not move relative to the implant 15 .

[0043] The treatment cap 12 is fixedly connected to the fixing screw 13 and the upper end of the fixing base 14. The treatment cap 12 is provided with a magnetic attraction member 11, and the treatment cap 12 cooperates with the magnet to fix the denture.

[0044] The embodiment sets the implant 15 as an end portion and a cone portion connected upper and lower, sets an external thread 16 on the cone portion, and divides the external thread 16 into a first pore area 17 with a first pore and a second pore area 18 with a second pore. This setting method allows the implant 15 to be set as the first pore area with a through hole when combined with bone tissue, which is convenient for combining with compact bone tissue, and the second pore area with a blind hole is convenient for combining with cancellous bone tissue, so as to optimize the elastic modulus of the implant 15, thereby improving the bone bonding performance of the dental implant, with appropriate strength, and at the same time making the stress shielding smaller and the biomechanical performance good, thereby solving the problems of poor bone bonding performance and large stress shielding of existing dental implants.

[0045] The specific structure of the dental implant of this embodiment is further described below:

[0046] In this embodiment, the slope of the outer surface of the cone of the implant 15 can be set to 4° to 6°, so as to facilitate the implantation of the implant 15 and enhance the strength of the implant 15. In the specific size, the upper base diameter is 4.4 mm ± 0.02 mm, and the lower base diameter is 2.8 mm ± 0.02 mm.

[0047] The first pore on the cone is a through hole with a pore diameter of 0.3mm±0.02mm. The pore diameter of the second pore is 0.3mm±0.02mm, and the pore depth of the second pore is 1.0mm±0.02mm. The first pore area is mainly located around the compact bone, and the second pore area is mainly located around the cancellous bone. The partition setting is conducive to better integration with bone tissue and effectively improves the success rate of implantation.

[0048] Furthermore, a plurality of first pores are arranged in a circumferential array in the first pore region 17 , and a plurality of second pores are also arranged in a circumferential array in the second pore region 18 .

[0049] In this embodiment, the pitch of the external thread 16 of the cone portion can be set to 0.8 mm ± 0.02 mm. The pitch of 0.8 mm is helpful to alleviate the stress concentration.

[0050] In this embodiment, the treatment cap 12 is fixedly connected to the fixing screw 13 by a connecting screw. In other embodiments, the connection between the treatment cap 12 and the fixing screw 13 or the fixing base 14 can also be various, which is not specifically limited here.

[0051] In this embodiment, the implant 15 is integrally formed by metal additive manufacturing technology, i.e., 3D printing, and the material of the implant 15 is pure titanium, so that the elastic modulus of the implant 15 as a whole is 35-40 GPA. The elastic modulus of the implant can be achieved by controlling the porosity and the selected material.

[0052] In this embodiment, the material of the treatment cap 12 is XM27. The magnetic attraction member 11 can be a magnet, and the material of the magnet is AlNiCo. The magnet can be sealed in the treatment cap 12 by welding. The purpose of welding the magnet is to fix the position of the magnet and prevent the magnet from moving.

[0053] Embodiment 2

[0054] A method for manufacturing a dental implant is used to manufacture the dental implant in the first embodiment, and the specific steps are as follows:

[0055] S1: Using the DICOM modeling method, CT technology was used to photograph the edentulous mandible, and the corresponding CT data were obtained, so as to use the medical imaging software Minics, the reverse engineering software Geomagic and the 3D design software SolidWorks to build the first 3D finite element model including the edentulous mandible, mucosa and denture. The purpose of building this model is to simulate the actual application effect of dental implants under real implantation conditions;

[0056] S2: Based on the dental implant drawing, the various parts of the dental implant three-dimensional model are established in SolidWorks, and assembled to form a second three-dimensional finite element model of the dental implant.

[0057] S201: Performing detailed processing on the implant 15, drawing a spiral line along the inclined surface from the bottom of the cone, drawing a cutting pattern at the starting point, cutting upward along the spiral line to obtain an external thread 16 on the cone, and setting a pore structure at the external thread 16. The pore area is vertically divided into four areas, and the pore area as a whole presents a whole column structure, wherein the first pore area 17 is set as a through hole, and the second pore area 18 is set as a blind hole; and adding an internal thread on the inner side of the implant 15, the internal thread of the implant 15 is engaged with the external thread on the fixing screw 13;

[0058] S3: Assemble the first three-dimensional finite element model in step S1 and the second three-dimensional finite element model in step S2 to obtain a required third three-dimensional finite element model.

[0059] S4: Perform finite element analysis on the dental implant using ANSYS, add material properties to the third three-dimensional finite element model, add different loads to simulate different actual conditions, calculate and analyze the biomechanical properties of the implant 15, analyze the corresponding results of the dental implant, and adjust various parameters of the implant 15 according to the simulation results of the finite element analysis so that the dental implant meets the required strength requirements.

[0060] S5: Print out a finished dental implant using selective laser melting 3D printing technology, process the finished dental implant 15, and after further processing, clean and disinfect it.

[0061] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A dental implant, characterized in that: Including implant, fixing screw, fixing base, and treatment cap; The implant comprises an end portion and a cone portion; the upper end of the cone portion is connected to the lower end of the end portion; the lower base diameter of the cone portion is smaller than the upper base diameter; and the outer surface of the cone portion is provided with an external thread; The external thread is provided with a first pore area and a second pore area from bottom to top; a plurality of first pores are provided in the first pore area, and the first pores are through holes; a plurality of second pores are provided in the second pore area, and the second pores are blind holes; The upper end of the implant formed by the cooperation between the end portion and the cone portion has an accommodation space; The lower end of the fixed base is installed in the accommodating space; the fixed base is provided with an internal thread, and the internal thread extends to the implant; The fixing screw is threadably connected to the fixing base and the implant through the internal thread; The treatment cap is fixedly connected to the upper end of the fixing screw; A magnetic attraction component is provided inside the treatment cap; The pore size of the first pore is 0.3 mm ± 0.02 mm; the pore size of the second pore is 0.3 mm ± 0.02 mm, and the pore depth of the second pore is 1.0 mm ± 0.02 mm; A plurality of the first pores are arranged in a circular array in the first pore region; a plurality of the second pores are arranged in a circular array in the second pore region; The pitch of the external thread is 0.8 mm ± 0.02 mm.

2. The dental implant according to claim 1, wherein: The slope of the outer surface of the cone is 4° to 6°, the diameter of the upper base is 4.4 mm±0.02 mm, and the diameter of the lower base is 2.8 mm±0.02 mm.

3. The dental implant according to claim 1, wherein: The treatment cap is fixedly connected to the fixing screw via a connecting screw.

4. The dental implant according to claim 1, wherein: The implant is integrally formed using metal additive manufacturing technology, and the material of the implant is titanium.

5. The dental implant according to claim 1, wherein: The material of the treatment cap is XM27.

6. The dental implant according to claim 1, wherein: The magnetic attraction component is a magnet, the material of the magnet is AlNiCo, and the magnet is sealed in the treatment cap by welding.

7. A method for manufacturing a dental implant, characterized in that: For manufacturing the dental implant according to any one of claims 1 to 6, the specific steps are as follows: S1: Using the DICOM modeling method, the edentulous mandible was photographed using CT technology to obtain the corresponding CT data, and then the first three-dimensional finite element model including the edentulous mandible, mucosa and denture was established using the medical imaging software Minics, the reverse engineering software Geomagic and the three-dimensional design software SolidWorks; S2: Based on the dental implant drawings, the various parts of the dental implant 3D model are established in SolidWorks and assembled to form a second 3D finite element model of the dental implant; S3: Assembling the first three-dimensional finite element model in step S1 and the second three-dimensional finite element model in step S2 to obtain a desired third three-dimensional finite element model; S4: performing finite element analysis on the dental implant using ANSYS, adding material properties to the third three-dimensional finite element model, adding different loads to simulate different actual situations, calculating and analyzing the biomechanical properties of the implant, analyzing the corresponding results of the dental implant, and adjusting various parameters of the implant according to the simulation results of the finite element analysis, so that the dental implant meets the required strength requirements; S5: Print out the finished dental implant product by using selective laser melting 3D printing technology, and process, clean and disinfect the finished dental implant product.

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