Bone trabecula porous tantalum dental implant and preparation method thereof

A technology for dental implants and porous tantalum, which is used in dental implants, dentistry, additive manufacturing, etc., can solve the problems of poor implantation stability of dental implants, difficult to prepare dental implants, easy oxidation mechanical properties, etc., and achieve stable implantation. Good stability and long-term stability, excellent osteoconductive and osteoinductive properties, and the effect of shortening the implantation period

Pending Publication Date: 2020-08-07
深圳大洲医学科技有限公司
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  • Abstract
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Problems solved by technology

However, since the melting point of tantalum metal is as high as 2996°C, it is easy to oxidize and cause a decline in mechanical properties, so it is not easy to prepare dental implants; there are currently some reports in the field of applying tantalum metal to dental implants, and the main body of the dental implant is still It is a titanium alloy, and the middle part uses chemical vapor deposition coating technology to obtain a porous structure by depositing tantalum metal on the surface of the glassy carbon skeleton, and then combines the titanium alloy main body and the central porous tantalum thin layer together by means of split mechanical combination. The implantation stability of dental implants is still poor, and there is a risk of delamination and detachment under the action of torsional force during implantation

Method used

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  • Bone trabecula porous tantalum dental implant and preparation method thereof
  • Bone trabecula porous tantalum dental implant and preparation method thereof
  • Bone trabecula porous tantalum dental implant and preparation method thereof

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preparation example Construction

[0043] The present invention also provides a method for preparing a trabecular porous tantalum dental implant described in the above scheme, comprising the following steps:

[0044] The three-dimensional model of the trabecular bone porous tantalum dental implant is constructed by using the modeling software, and the additive manufacturing is carried out with pure tantalum or medical tantalum alloy powder as the raw material according to the constructed model.

[0045] The present invention has no special requirements on the modeling software, and modeling software well known to those skilled in the art can be used.

[0046] After obtaining the three-dimensional model, the present invention preferably converts the three-dimensional model into the format required by the printing equipment and imports it into the additive manufacturing equipment, and then uses pure tantalum or tantalum-containing alloy medical tantalum alloy powder as raw material for printing; in the present inv...

Embodiment 1

[0056] Use professional modeling software to design the structure of the three functional areas, and build a three-dimensional model of the trabecular bone porous tantalum dental implant. Among them, the top functional area is a dense structure; the middle functional area is a bionic bone trabecular porous structure; the bottom functional area is dense structure. The total length is 16mm, the diameter is 6mm, the length of the top functional area is 5mm, the length of the middle functional area is 7mm, and the length of the bottom functional area is 4mm. There are threads for mechanical fixation on the outside of the top functional area, with a depth of 1mm; the upper surface has an inner hexagonal groove for connecting the abutment, with a depth of 3mm and a diameter of 3mm. The central functional area is a bionic bone trabecular porous structure with an average pore diameter of 500 μm, an average wire diameter of 300 μm, a porosity of 70%, and a pore connectivity of 99%; the...

Embodiment 2

[0065] Use professional modeling software to design the structure of the three functional areas, and build a three-dimensional model of the trabecular bone porous tantalum dental implant. Among them, the top functional area is a dense structure; the middle functional area is a bionic bone trabecular porous structure; the bottom functional area is dense structure. Overall length 13mm, diameter 5mm, top length 4mm, middle length 5mm, bottom length 4mm. On the outer side of the top functional area, there are threads for mechanical fixation, with a depth of 0.8mm; on the upper surface, there are inner hexagonal grooves for connecting the abutment, with a depth of 2mm and a diameter of 3mm. The central functional area has a bionic bone trabecular porous structure, with an average pore size of 470 μm, an average wire diameter of 330 μm, a porosity of 75%, and a pore connectivity of 99%; the center of the porous structure has an internal reinforcing column with a diameter of 2.5 mm. ...

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Abstract

The invention relates to the technical field of biomedical metal materials and oral implantation medical instruments, and provides a bone trabecula porous tantalum dental implant and a preparation method thereof. The bone trabecula porous tantalum dental implant provided by the invention has a cylindrical structure and sequentially comprises a top functional area, a middle functional area and a bottom functional area from top to bottom. The top functional area is of a compact structure, the middle functional area has a bionic bone trabecula porous structure, and the bottom functional area hasa compact structure. The bone trabecula porous tantalum dental implant is integrally prepared by taking pure tantalum or medical tantalum alloy powder as a raw material through an additive manufacturing technology. The bone trabecula porous tantalum dental implant provided by the invention is high in friction force, close to human bone in strength and modulus, excellent in bone ingrowth effect, high in implantation stability and long in service life, is of an integrated structure, and has no risk of delamination and separation during implantation.

Description

technical field [0001] The invention relates to the technical field of biomedical metal materials and oral implant medical devices, in particular to a trabecular porous tantalum dental implant and a preparation method thereof. Background technique [0002] Oral and maxillofacial diseases and trauma, as well as severe dental caries cause a huge number of tooth loss, seriously affecting human health and quality of life. With the development of science and technology in the fields of biomedical materials, stomatology, surgical navigation, minimally invasive surgery, and advanced manufacturing, modern dental implant technology appeared in the 1950s. Subsequently, it was discovered that biometals implanted in the bone can be combined with the surrounding bone tissue. Based on this principle, pure titanium and titanium alloy dental implants are gradually commercialized. It is becoming more and more common to choose dental implants to treat tooth loss in oral clinical medicine. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C8/00
CPCA61C8/0012A61C8/0018A61C8/006B33Y80/00A61C8/0051A61C8/0059A61C8/0068A61C13/0019
Inventor 杨景周杨景浩张大琛张树培陈海深
Owner 深圳大洲医学科技有限公司
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