Personalized root type implant

Abstract

The utility model discloses a personalized root type implant. Comprising an implant body, a central screw hole is formed in the upper end of the implant body, a Morse taper hole is formed in the upper portion of the central screw hole, and an inner hexagonal base hole is formed in the upper end of the Morse taper hole; the implant made of Ti-Ta alloy is close to a bone tissue of a human body, so that the stress shielding effect is effectively reduced; meanwhile, due to the introduction of tantalum, the corrosion resistance and bone combining capacity of the material are improved; a 3D printing technology is adopted to realize that the implant is completely matched with a tooth extraction socket in shape, and bone holes and convex blocks of a bionic bone trabecula porous structure are constructed on the surface of the interior part of a bone, so that the implant is convenient to mount in a tooth socket; the central screw hole and the Morse taper hole are designed at the upper end of the implant, so that the false tooth is conveniently mounted and connected, and the inner hexagonal base hole is formed at the upper end of the implant, so that the connection stability of the false tooth is conveniently improved, and the false tooth is prevented from rotating and falling off.

Description

Technical Field

[0001] This utility model belongs to the field of dental root implant technology, and in particular relates to a personalized root implant. Background Technology

[0002] Personalized root implants are implants made according to the shape of the tooth root of the affected tooth. Their shape matches the alveolar socket, and they can be implanted without preparing a cavity after tooth extraction. They have the characteristics of being immediate, minimally invasive, having good initial stability, good aesthetic effect, and good biomechanical compatibility.

[0003] From a biomechanical perspective, the morphology of natural tooth roots is the optimal adaptation to the local biomechanical environment. Implants that perfectly match the shape of the extraction socket offer significant advantages: immediate placement is possible, shortening the treatment cycle; the contact area between the implant and bone tissue is maximized, providing better initial stability; the risk of bone resorption after extraction is reduced; and soft tissue support is improved, optimizing aesthetic results. These characteristics make them an ideal choice for rapid restorations and applications with high aesthetic requirements.

[0004] However, existing technologies have some problems: traditional implants suffer from the following issues: standardized morphology makes it difficult to match personalized extraction sockets, affecting immediate implantation results; traditional fabrication processes struggle to achieve complex biomimetic structures; the connection methods are limited, failing to meet diverse restorative needs; and the interface between the implant and soft tissue is suboptimal, affecting aesthetic results. On the other hand, pure titanium and Ti-6Al-4V titanium alloys are the most commonly used materials for dental implants, but their elastic modulus (110-114 GPa) is much higher than that of bone tissue (cancellous bone approximately 4-7 GPa, cortical bone approximately 13-17 GPa), easily leading to stress shielding effects and peri-implant bone resorption. Therefore, we propose a personalized root-shaped implant. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a personalized root-shaped implant. The 3D prototype root-shaped implant is prepared by using titanium-tantalum alloy, and the design of Morse taper holes and internal hexagonal base holes allows the root-shaped implant to fit the shape of the extraction socket, enabling immediate implantation, shortening the treatment cycle, and facilitating the stable connection of the prosthesis.

[0006] This utility model is implemented as follows: a personalized root-shaped implant includes an implant body, the upper end of which has a central screw hole, the upper part of which has a Morse taper hole, and the upper end of which has an internal hexagonal base hole.

[0007] Specifically, the implant body includes an abutment portion and a multi-root portion, with the multi-root portion located in the lower part of the abutment portion.

[0008] Specifically, the implant body, the central screw hole, the Morse taper hole, and the internal hexagonal base hole are integrally printed using a metal 3D printer with Ti-40Ta alloy powder.

[0009] Specifically, the Ti-40Ta alloy powder is prepared by gas atomization, and the particle diameter of the Ti-40Ta alloy powder is 45-100μm; the laser power of the metal 3D printer is 300W, the scanning speed is 700mm / s, and the layer thickness is 30μm.

[0010] Specifically, the depth of the internal hexagonal base hole is 3mm, the diameter of the central screw hole is 2.5mm, the internal hexagonal base hole is connected to the Morse taper hole, and the central screw hole is located in the middle of the Morse taper hole.

[0011] Specifically, the surface of the multi-tooth root is provided with bone holes and protrusions, the bone holes are located at the bottom of the multi-tooth root, and the protrusions are located at the upper part of the multi-tooth root.

[0012] Specifically, the side surface of the abutment is set as a smooth surface, the height of the smooth surface is set to 1.5 mm, and the porosity of the bone pore is 45-65%.

[0013] Specifically, the height of the multi-tooth root is 4mm, the height of the bone foramen is 2mm, and the height of the protrusion is also 2mm.

[0014] Specifically, the multi-root portion reconstructs the shape of the extraction socket based on CBCT data, the multi-root portion is connected to the interior of the extraction socket, and the abutment portion is connected to the interior of the gingiva.

[0015] Specifically, the upper part of the base is fitted with a denture, and the screw at the lower end of the denture is threaded into the interior of the central screw hole. The support block at the lower end of the denture follows the screw and engages with the interior of the Morse taper hole. The bottom of the denture is engaged with the interior of the internal hexagonal base hole.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention utilizes a Ti-Ta alloy to significantly improve the biomechanical properties of the implant, balancing durability and reducing the stress barrier effect. The titanium-tantalum alloy, selected as the main material, possesses excellent biocompatibility and mechanical properties. Its elastic modulus is significantly lower than that of the traditional Ti-6Al-4V alloy, more closely resembling human bone tissue, effectively reducing the stress shielding effect. Simultaneously, the introduction of tantalum enhances the material's corrosion resistance and bone integration capacity. Biomimetic design and personalized matching are achieved through 3D printing, enabling minimally invasive surgery and long-term implant stability. 3D printing technology ensures the implant perfectly matches the extraction socket morphology. The inner surface of the bone incorporates biomimetic trabecular porous structures with bone holes and protrusions, facilitating implant fixation within the socket. Furthermore, a central screw hole and a Morse taper hole are designed at the upper end of the implant for easy connection and installation of the prosthesis, along with an internal hexagonal base hole at the upper end to improve connection stability and prevent rotational dislodgement.

[0018] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the planting body structure provided by this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the planting body provided by this utility model;

[0021] Figure 3 This is a top view of the end face of the planting body provided by this utility model.

[0022] In the diagram: 1. Implant body; 101. Abutment; 102. Root of multiple teeth; 103. Bone hole; 104. Protrusion; 105. Smooth surface; 2. Central screw hole; 3. Morse taper hole; 4. Internal hexagonal base hole. Detailed Implementation

[0023] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0024] like Figures 1 to 3 As shown, the present invention provides a personalized root-type implant, including an implant body 1, a central screw hole 2 at the upper end of the implant body 1, a Morse taper hole 3 at the upper part of the central screw hole 2, and an internal hexagonal base hole 4 at the upper end of the Morse taper hole 3.

[0025] In this embodiment, preferably, the implant body 1 includes an abutment portion 101 and a multi-root portion 102, with the multi-root portion 102 disposed at the lower part of the abutment portion 101.

[0026] It should be noted that the design of the multi-root portion 102 facilitates connection to the tooth socket, making it easy and stable to connect to the tooth socket. This allows the granulation tissue of the tooth socket to quickly fix the multi-root portion 102, maintaining the stable installation of the multi-root portion 102. Furthermore, the design of the abutment portion 101 facilitates the installation and connection of the prosthesis.

[0027] In this embodiment, preferably, the implant body 1, the central screw hole 2, the Morse taper hole 3, and the internal hexagonal base hole 4 are integrally printed using a metal 3D printer with Ti-40Ta alloy powder.

[0028] It should be noted that by using a 3D printer to print Ti-40Ta alloy powder in one piece, the implant body 1 can be formed as a whole, thereby improving the overall strength of the implant body 1.

[0029] In this embodiment, preferably, Ti-40Ta alloy powder is prepared by gas atomization, and the particle diameter of Ti-40Ta alloy powder is 45-100μm; the laser power of the metal 3D printer is 300W, the scanning speed is 700mm / s, and the layer thickness is 30μm.

[0030] It should be noted that the Ti-40Ta alloy powder is prepared by gas atomization, which facilitates the printing of the implant body 1 by the metal 3D printer and maintains the smoothness and density of the implant body 1.

[0031] In this embodiment, preferably, the depth of the internal hexagonal base hole 4 is 3mm, the diameter of the central screw hole 2 is 2.5mm, the internal hexagonal base hole 4 is connected to the Morse taper hole 3, and the central screw hole 2 is located in the middle of the Morse taper hole 3;

[0032] It should be noted that the internal hexagonal base hole 4 is used to fix the denture and prevent it from rotating and loosening. The central screw hole 2 is used to facilitate the installation and connection of the denture, and the Morse taper hole 3 is used to facilitate the snap-fit ​​connection, thereby improving the connection stability of the denture.

[0033] In this embodiment, preferably, the surface of the multi-tooth root portion 102 is provided with a bone hole 103 and a protrusion 104, the bone hole 103 is provided at the bottom of the multi-tooth root portion 102, and the protrusion 104 is provided at the upper part of the multi-tooth root portion 102.

[0034] It should be noted that the design of the bone hole 103 and the protrusion 104 facilitates the growth and fixation of granulation tissue when the multi-tooth root 102 is installed inside the extraction socket, thereby improving the installation and fixation of the multi-tooth root 102.

[0035] In this embodiment, preferably, the side surface of the base portion 101 is set as a smooth surface 105, the height of the smooth surface 105 is set as 1.5 mm, and the porosity of the bone hole 103 is 45-65%.

[0036] It should be noted that the smooth surface 105 is designed to facilitate the fit of the gums, maintain contact between the gums and the smooth surface 105, and prevent damage to the gums.

[0037] In this embodiment, preferably, the height of the multi-tooth root 102 is 4mm, the height of the bone hole 103 is 2mm, and the height of the protrusion 104 is also 2mm.

[0038] It should be noted that the height of the multi-tooth root 102 facilitates deep penetration into the extraction socket and promotes the growth and connection of duck meat.

[0039] In this embodiment, preferably, the multi-root portion 102 is reconstructed based on CBCT data to recreate the shape of the extraction socket, the multi-root portion 102 is connected to the interior of the extraction socket, and the abutment portion 101 is connected to the interior of the gingiva.

[0040] It should be noted that the multi-root portion 102 is fabricated according to the shape of the extraction socket using CBCT data, which facilitates the stable installation and connection of the multi-root portion 102 inside the extraction socket, and the gingiva wraps and fixes the abutment portion 101.

[0041] In this embodiment, preferably, a denture is attached to the upper part of the base portion 101, and the screw at the lower end of the denture is threaded into the interior of the central screw hole 2, and the support block at the lower end of the denture is engaged with the screw in the interior of the Morse taper hole 3, and the bottom of the denture is engaged with the interior of the internal hexagonal base hole 4.

[0042] It should be noted that the denture is installed and connected through the base part 101, fixed by threaded connection through the central screw hole 2, and fixed by the support block through the Morse taper hole 3. The bottom of the denture is then engaged through the internal hexagonal base hole 4 to prevent the denture from rotating and loosening.

[0043] The specific steps of this application are as follows:

[0044] Titanium-tantalum alloy (Ti-xTa, x = 30-50 wt%) was selected as the main material. This alloy has excellent biocompatibility and mechanical properties, and its elastic modulus (75-85 GPa) is significantly lower than that of the traditional Ti-6Al-4V alloy, making it closer to human bone tissue and effectively reducing the stress shielding effect. At the same time, the introduction of tantalum element improves the material's corrosion resistance and bone integration ability. 3D printing technology was used to achieve a perfect match to the tooth extraction socket morphology. The surface of the multi-root portion 102 is provided with bone holes 103 and protrusions 104. Located at the bottom of the multi-root portion 102, the protrusion 104 is located at the top of the multi-root portion 102, with a porosity and clearance of 45-65%; the central screw hole 2 is designed with an M2.0 thread and an internal connection anti-rotation structure, the internal connection anti-rotation structure being a Morse taper hole 3 and an internal hexagonal base hole 4, and the side surface of the abutment portion 101 can be optionally added as a smooth surface 105 with a height of 1-2mm to meet different restoration needs; combined with advanced processes such as selective laser melting 3D printing and plasma surface treatment, the precise manufacturing of personalized implants can be achieved;

[0045] Specific implementation method: First, Ti-40Ta alloy powder with a particle size of 45-100μm is prepared by gas atomization; then, it is shaped using a metal 3D printer with a laser power of 300W, a scanning speed of 700mm / s, and a layer thickness of 30μm; then, plasma surface treatment is performed with a power of 200W for 15min.

[0046] The digital design process for personalized implants involves reconstructing the extraction socket morphology based on CBCT data, designing a matching implant shape, and adding internal connection structures, including an internal hexagonal base hole 4 with a depth of 3mm, a Morse taper hole 3, an abutment portion 101, a central screw hole 2 with a diameter of 2.5mm, and a smooth side surface 105 with a height of 1.5mm on the abutment portion 101.

[0047] During installation, the multi-tooth root 102 is first installed inside the extraction socket and fixed through the bone hole 103 and protrusion 104 under the growth connection of granulation tissue, maintaining the stable connection of the multi-tooth root 102. The gingiva adheres to the smooth surface 105 of the side surface of the abutment 101, thus wrapping the abutment 101. Before the implant body 1 is installed inside the gingiva, the prosthesis is installed on the upper part of the abutment 101, and the screw at the lower end of the prosthesis is threaded into the central screw hole 2. The support block at the lower end of the prosthesis is engaged with the screw in the Morse taper hole 3, and the bottom of the prosthesis is engaged with the internal hexagonal base hole 4. The prosthesis is installed and connected through the abutment 101, fixed by the threaded connection through the central screw hole 2, and fixed by the Morse taper hole 3. The bottom of the prosthesis is then engaged through the internal hexagonal base hole 4 to prevent the prosthesis from rotating and loosening.

[0048] Performance test results show excellent overall performance:

[0049] Mechanical properties: Elastic modulus 80±5GPa, significantly lower than traditional Ti-6Al-4V alloy; compressive strength 1050±30MPa, tensile strength 920±25MPa, elongation >15%, fatigue strength >600MPa, which is superior to pure titanium and Ti-6Al-4V alloy according to 100 cycle test; surface roughness Ra=2.8±0.3μm;

[0050] Biological performance: In vitro cell experiments showed excellent osteoblast compatibility, and the cell proliferation rate was significantly higher than that of Ti-6Al-4V; animal experiments showed that the bone integration area accounted for more than 70%, the primary soft tissue healing rate exceeded 98%, and the pull-out force at 12 weeks exceeded 120N.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A personalized root-type implant, characterized in that, The device includes a planting body (1), the upper end of which is provided with a central screw hole (2), the upper part of which is provided with a Morse taper hole (3), and the upper end of which is provided with an internal hexagonal base hole (4). The implant body (1) includes an abutment portion (101) and a multi-root portion (102), wherein the multi-root portion (102) is disposed in the lower part of the abutment portion (101); The implant body (1), the central screw hole (2), the Morse taper hole (3) and the internal hexagonal base hole (4) are integrally printed using Ti-40Ta alloy powder by a metal 3D printer.

2. The personalized root-type implant according to claim 1, characterized in that: The Ti-40Ta alloy powder is prepared by gas atomization, and the particle diameter of the Ti-40Ta alloy powder is 45-100μm; the laser power of the metal 3D printer is 300W, the scanning speed is 700mm / s, and the layer thickness is 30μm.

3. The personalized root-type implant according to claim 1, characterized in that: The depth of the internal hexagonal base hole (4) is 3mm, the diameter of the central screw hole (2) is 2.5mm, the internal hexagonal base hole (4) is connected to the Morse taper hole (3), and the central screw hole (2) is located in the middle of the Morse taper hole (3).

4. The personalized root-type implant according to claim 1, characterized in that: The surface of the multi-tooth root portion (102) is provided with a bone hole (103) and a protrusion (104). The bone hole (103) is located at the bottom of the multi-tooth root portion (102), and the protrusion (104) is located at the top of the multi-tooth root portion (102).

5. A personalized root-type implant according to claim 4, characterized in that: The side surface of the base portion (101) is set as a smooth surface (105), the height of the smooth surface (105) is set to 1.5 mm, and the porosity of the bone hole (103) is 45-65%.

6. A personalized root-type implant according to claim 5, characterized in that: The height of the multi-tooth root (102) is 4 mm, the height of the bone hole (103) is 2 mm, and the height of the protrusion (104) is also 2 mm.

7. A personalized root-type implant according to claim 1, characterized in that: The multi-root portion (102) is a reconstruction of the shape of the extraction socket based on CBCT data. The multi-root portion (102) is connected to the interior of the extraction socket, and the abutment portion (101) is connected to the interior of the gingiva.

8. A personalized root-type implant according to claim 1, characterized in that: The base portion (101) is fitted with a denture, and the screw at the lower end of the denture is threaded into the interior of the central screw hole (2). The support block at the lower end of the denture is engaged with the screw in the interior of the Morse taper hole (3), and the bottom of the denture is engaged with the interior of the internal hexagonal base hole (4).

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