Gradient porous implant with drug carrying function

Abstract

The invention discloses a gradient porous implant with drug carrying function. The implant comprises a compact core, a transition layer and a porous layer with an interconnected pore structure from the inside out in order. The implant is composed of the compact core, the transition layer and the porous layer, the porous layer is equipped with normal diamond shaped holes, the compact core is used for ensuring the strength requirements of the implant, the outermost porous layer is conducive to biological tissue ingrowth and improvement of mechanical fixation effect. The dental implant provided by the invention has the advantages of simple structure, scientific and reliable design, simple processing and making, good bone induction and osseointegration performance, and can effectively solve the poor biomechanical adaptation and other problems of existing titanium alloy dental implants.

Description

technical field [0001] The invention relates to the technical field of dental implant restoration, in particular to a gradient porous implant with drug carrying function. Background technique [0002] Dental implants currently used clinically do not match the mechanical properties of the surrounding bone tissue, which will cause stress shielding at the implant-bone interface, easily cause bone resorption, and affect the long-term effect of osseointegration. Therefore, it is necessary to reduce the elastic modulus of the dental implant so that it can match the bone tissue. [0003] Not only that, the surface of commercial pure titanium dental implants has only been sandblasted and acid-etched. Although it has good biocompatibility, it has no biological activity. After the first-stage implant surgery, the bone tissue between the implant and the alveolar bone grows slowly, and it takes 3-6 months for the second-stage repair surgery, and patients with poor bone conditions need ...

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Problems solved by technology

[0004] Aiming at the deficiencies of medical titanium alloys, to solve the problem of elastic modulus mismatch between dental implants and bones, and to enhance the stability between implants and bones, accelerate osseointegration, and shorten healing time, the researchers proposed the use of porosity And with drug-coated implants, but the porous dental implants prepared by traditional methods such as powder metallurgy usually have a uniform porous microstructure, and their mechanical properties cannot meet the high-frequency and high-strength force requirements of the oral environment. Therefore, to solve this problem Issues such as the

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