# US 2021/0330431 A1 · Trabecular porous tantalum dental implant and preparation method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0330431 A1 - Document ID: US20210330431A1 - Status: Published application - Kind: A1 - Application number: 17/238,419 - Filed: 2021-04-23 - Published: 2021-10-28 - Earliest claimed: 2020-04-24 - Assignees: Shenzhen Dazhou Medical Technology Co., Ltd. - Applicants: Shenzhen Dazhou Medical Technology Co.,Ltd. - Inventors: Jingzhou YANG; Jinghao YANG; Dachen ZHANG; Shupei ZHANG; Haishen CHEN - Web page: https://patentgrep.com/patent/US20210330431A1 ## CPC - A61C 8/0051: {Abutment monobloc with restoration} - A61C 8/0012: {characterised by the material or composition, e.g. ceramics, surface layer, metal alloy (use of specific materials A61K6/00)} - A61C 8/0059: {with additional friction enhancing means} - A61C 8/006: {with polygonal positional means, e.g. hexagonal or octagonal} - A61C 8/0068: {with an additional screw} - A61C 13/0019: {using three dimensional printing} - B33Y 80/00: Products made by additive manufacturing - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING ## Abstract The present invention provides a trabecular porous tantalum dental implant and a preparation method thereof. The trabecular porous tantalum dental implant provided by the present invention has a cylindrical structure, and sequentially includes a top functional area, a middle functional area and a bottom functional area from top to bottom. The top functional area has a compact structure. The middle functional area has a porous bionic trabecular structure. The bottom functional area has a compact structure. The trabecular porous tantalum dental implant is integrally prepared through an additive manufacturing technology by using pure tantalum or medical tantalum alloy powder as a raw material. The trabecular porous tantalum dental implant provided by the present invention has a high friction force, strength and modulus close to those of human bones, an excellent bone ingrowth effect, high implantation stability and long service life. ## Claims ### Claim 1 A trabecular porous tantalum dental implant, the trabecular porous tantalum dental implant having a cylindrical structure, and sequentially comprising: a top functional area; a middle functional area; and a bottom functional area from top to bottom; the top functional area having a compact structure, the middle functional area having a porous bionic trabecular structure, and the bottom functional area having a compact structure; and the trabecular porous tantalum dental implant being integrally prepared through an additive manufacturing technology by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 2 (depends on 1) The trabecular porous tantalum dental implant according to claim 1, wherein the trabecular porous tantalum dental implant has a total length of 5-25 mm, a diameter of 3-10 mm, a length of the top functional area of 1-10 mm, a length of the middle functional area of 1-15 mm, and a length of the bottom functional area of 1-10 mm. ### Claim 3 (depends on 1) The trabecular porous tantalum dental implant according to claim 1, wherein: an outer side of the top functional area is provided with a thread or groove for mechanical fixation, and the depth of the thread or groove is 0.1-3 mm; and an upper surface of the top functional area is provided with a notch for connecting an abutment, and the notch has a depth of 0.1-10 mm and a diameter of 1-8 mm. ### Claim 4 (depends on 2) The trabecular porous tantalum dental implant according to claim 2, wherein: an outer side of the top functional area is provided with a thread or groove for mechanical fixation, and the depth of the thread or groove is 0.1-3 mm; and an upper surface of the top functional area is provided with a notch for connecting an abutment, and the notch has a depth of 0.1-10 mm and a diameter of 1-8 mm. ### Claim 5 (depends on 1) The trabecular porous tantalum dental implant according to claim 1, wherein the porous bionic trabecular structure has an average pore diameter of 100-1500 μm, an average wire diameter of 200-1000 μm, a porosity of 10-90%, and a pore connectivity greater than 90%. ### Claim 6 (depends on 1) The trabecular porous tantalum dental implant according to claim 1, wherein a center of the middle functional area is provided with a reinforcing pillar, and the reinforcing pillar has a length of 1-15 mm and a diameter of 1-9.5 mm. ### Claim 7 (depends on 2) The trabecular porous tantalum dental implant according to claim 2, wherein a center of the middle functional area is provided with a reinforcing pillar, and the reinforcing pillar has a length of 1-15 mm and a diameter of 1-9.5 mm. ### Claim 8 (depends on 2) The trabecular porous tantalum dental implant according to claim 2, wherein an outer side of the bottom functional area is provided with a thread or groove for mechanical fixation, and the depth of the thread or groove is 0.1-3 mm. ### Claim 9 (depends on 1) The trabecular porous tantalum dental implant according to claim 1, wherein a purity of the pure tantalum is greater than 99%, a content of a tantalum element in the medical tantalum alloy powder is greater than 1 wt %, and the particle size of the pure tantalum or the medical tantalum alloy powder is independently 10-150 μm. ### Claim 10 (depends on 1) The trabecular porous tantalum dental implant according to claim 1, wherein the additive manufacturing technology comprises a laser melting additive manufacturing technology or an electron-beam melting additive manufacturing technology. ### Claim 11 (depends on 1) A method for preparing the trabecular porous tantalum dental implant according to claim 1, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 12 (depends on 2) A method for preparing the trabecular porous tantalum dental implant according to claim 2, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 13 (depends on 3) A method for preparing the trabecular porous tantalum dental implant according to claim 3, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 14 (depends on 4) A method for preparing the trabecular porous tantalum dental implant according to claim 4, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 15 (depends on 5) A method for preparing the trabecular porous tantalum dental implant according to claim 5, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 16 (depends on 6) A method for preparing the trabecular porous tantalum dental implant according to claim 6, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 17 (depends on 7) A method for preparing the trabecular porous tantalum dental implant according to claim 7, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 18 (depends on 8) A method for preparing the trabecular porous tantalum dental implant according to claim 8, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 19 (depends on 9) A method for preparing the trabecular porous tantalum dental implant according to claim 9, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material. ### Claim 20 (depends on 10) A method for preparing the trabecular porous tantalum dental implant according to claim 10, the method for preparing the trabecular porous tantalum dental implant comprising the following steps: constructing a three-dimensional model of the trabecular porous tantalum dental implant by using a modeling software; and conducting additive manufacturing according to the constructed model by using pure tantalum or medical tantalum alloy powder as a raw material.