Porous dental implant internally combined with biodegradable magnesium alloy and manufacturing method of porous dental implant

Abstract

The invention discloses a porous dental implant internally combined with biodegradable magnesium alloy and a manufacturing method of the porous dental implant. The dental implant comprises a main bodyand an embedded body, wherein the main body is composed of a bone grafting section and a transgingival section, and the side wall of the bone grafting section is provided with a thread; the embeddedbody is a cylinder prepared from a biodegradable magnesium alloy material, and the surface of the embedded body is provided with an external thread. An internal threaded hole allowing the embedded body to be screwed in is formed in the bottom end of the bone grafting section, a plurality of permeating holes are formed in the bone grafting section, one end of each permeating hole is communicated with the internal threaded hole, and the other end of each permeating hole is communicated with the side wall of the bone grafting section. By means of the dental implant, under the condition that the porosity of the dental implant is ensured, the mechanical property and strength of the dental implant are ensured. The magnesium alloy is mechanically connected with the dental implant body through threads, the operation is simple, and connection is stable and reliable. After implantation, the magnesium alloy is automatically degraded, meanwhile, bone cells are induced to grow into the dental implant, and finally, synostosis is achieved. In the magnesium alloy degradation process, the mechanical property of the dental implant can meet work requirements all the time.

Description

technical field [0001] The present invention relates to the technical field of dental implants. Background technique [0002] Most of the existing dental implants are made of pure titanium or titanium alloy, and most of them are solid structures. Its elastic modulus and yield strength are much larger than that of bone tissue, and stress shielding is easy to occur. In response to the problem of stress shielding, a method of 3D printing to manufacture porous dental implants has been proposed. It uses selective laser melting technology or other 3D printing additive manufacturing technology to manufacture dental implants with regular or irregular pores in the bone graft segment of the implant base. [0003] In the existing solid-structured pure titanium or titanium alloy dental implants, the elastic modulus and yield strength are much larger than those of the bone tissue, which can easily cause the problem of stress shielding. This affects the regeneration of bone tissue, is ...

AI Technical Summary

Problems solved by technology

[0003] The existing pure titanium or titanium alloy dental implants with solid structure have much higher elastic modulus and yield strength than bone tissue, which can easily cause stress shielding problems

This affects the regeneration of bone tissue, is not conducive to osseointegration, and ultimately affects the stability and service life of the implant.

Existing implants with porous structures are manufactured by 3D printing, which are prone to processing defects due to the influence of processing accuracy, and stress concentration occurs in the pores, which eventually leads to the mechanical strength of dental implants with porous structures not up to standard

And the porous structure sacrifices the surface area of ​​the implant, which affects the process of osseointegration

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