Multi-vector stress dispersion interlocking configuration oral implant

A technology for oral implants and stress dispersion, which is applied in the fields of dental implants, medical science, and dentistry, and can solve problems such as bone resorption and stress shielding that cannot be completely avoided

Pending Publication Date: 2021-08-10
ZHONGSHAN HOSPITAL FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the stress shielding caused by the difference in elastic modulus between the titanium / titanium alloy base material of the implant and the bone tissue, the clinical results of bone resorption cannot be completely avoided in the end.
The challenge now is how to create more stress transfer along the normal direction of the surface where the central axis of the implant is located on the wall of the cone column, and how to combine such a vector coordinate system for stress transfer with the traditional convex thread design How to obtain better implant stability based on the combination of optimization, by creating a new implant design configuration to solve the above three problems at the same time, without affecting the normal use of the implant, and can Putting this new configuration into mass production will be a technical solution to completely solve the bone resorption caused by stress shielding around implants

Method used

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  • Multi-vector stress dispersion interlocking configuration oral implant
  • Multi-vector stress dispersion interlocking configuration oral implant
  • Multi-vector stress dispersion interlocking configuration oral implant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Submerged dental implant

[0035] The invention provides a design scheme of the geometric shape of the cone thread, the cone cylinder surface and the alveolar crest module of the dental implant, so as to achieve the best initial stability and secondary stability. At the same time, a manufacturing process based on laser fusion 3D printing is provided to manufacture this implant with a complex curved surface. The dental implant of the present invention includes the multi-vector stress dispersion configuration embedded implant, that is, a self-tapping implant with a reverse spiral concave surface, and an embedded implant with a dense thread short alveolar crest module. Dental implants to adapt to bone tissue level implant operation. Implant body comprises the alveolar crest module 4 of upper end (as image 3 ) and cone 5 (such as image 3 ); the upper end of the cone 5 is connected to the lower end of the alveolar crest; the diameter of the lower base of the ...

Embodiment 2

[0037] Embodiment 2: non-submerged dental implant

[0038] The dental implant of the present invention includes the multi-vector stress dispersion configuration embedded implant, that is, a self-tapping implant with a reverse spiral concave surface, and a non-embedded long alveolar crest module with a smooth outer wall. Recessed dental implants are suitable for soft tissue level implant operations. Implant body comprises the alveolar crest module 4 of upper end (as Figure 5 ) and cone 5 (such as Figure 5 ); the upper end of the cone 5 is connected to the lower end of the alveolar crest 4; the diameter of the lower base of the cone 5 is smaller than the diameter of the upper base; the outer surface of the cone 5 has a clockwise spiral (looking down from the upper end) convex thread ; The outer surface of the cone has a counterclockwise spiral concave surface 6 . In the dental implant of the present invention, the length of the tapered portion 5 is about 9.2±0.02mm. The le...

Embodiment 3

[0043] Apply laser fusion 3D printing technology to manufacture the molding and manufacturing of the above-mentioned dental implants, the specific steps are as follows:

[0044] Use 3D-CAD software (such as but not limited to Solidworks, CATIA, Within Medical, etc.) to design the 3D shape of the dental implant through computer-aided design technology, including the upper alveolar ridge module and the lower end cone. The function of the catenary torus is compiled on the reference surface of the implant cone cylinder wall, and the concave structure of the curved surface is excised on the vertebral body along this predefined helix.

[0045] After saving the 3D simulation file in STL format, use Magics to modify the shape, check the unclosed surface and the arm structure with too large projected area. Slice the 3D model layer by layer, add support and other data and other preprocessing, and obtain the cross-sectional information of each layer;

[0046] The sliced ​​multiple 3D mo...

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Abstract

The invention relates to a multi-vector stress dispersion interlocking configuration oral implant, and belongs to the technical field of medical instruments. The oral implant comprises an alveolar ridge crest module and a conical part; a conical part is arranged below the alveolar ridge crest module, continuous convex threads are arranged on the outer surface of the conical part, and the diameter of one end, close to the alveolar ridge crest module, of the conical part is larger than that of the other end; the outer surface of the conical part is further provided with a concave thread, and the spiral direction of the convex thread is opposite to that of the concave thread. According to the dental implant, the concave curved surface type threads with the spiral direction opposite to that of the convex threads are arranged on the column wall of the implant, so that the axial load of the dental implant is continuously transmitted to surrounding bone tissues after the osseointegration process is finished, and bone resorption caused by stress shielding is counteracted. Meanwhile, a set of new stress dispersion coordinates can be formed by the downwards-concave curved surface of the reverse screw to share the axial stress borne by the convex threads, mechanical interlocking is formed, and finally, the optimal initial stability and secondary stability are obtained.

Description

technical field [0001] The invention relates to a multi-vector stress dispersion interlocking configuration oral implant, which belongs to the technical field of medical devices. Background technique [0002] Dental implants need to maximize the bone graft contact (Bone ImplantContact, BIC) and implant stability (Implant Stability Quotient, ISQ) between the dental implant and the surrounding bone tissue. When the elastic modulus of the dental implant is much greater than the elastic modulus of the bone tissue, when the implant is under load, there is no stress transmission between the implant and the bone interface, and finally the stress on the surrounding bone tissue is less than 2MPa, and the bone tissue Bone resorption will occur. And when the stress on the bone tissue is greater than 60MPa, the bone tissue can also resorb. Therefore, the design optimization of the male thread of the implant is considered to be the key to the optimization of the implant geometry, and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C8/00
CPCA61C8/0034A61C8/0037
Inventor 杨斐余优成孙扬周倩蓉毕玮孙健陈敏芝
Owner ZHONGSHAN HOSPITAL FUDAN UNIV
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