A method for manufacturing a multi-material porous distal femur implant

Abstract

The invention discloses a multi-material porous femoral distal implant and a manufacturing method thereof. The implant includes a hard gradient porous femoral distal implanted trunk and soft hydrogel cartilage; the hard gradient porous femoral distal The end-implanted torso is a porous structure, and the outer contour is divided into a conical femoral body and two spherical imitation femoral ankles; the soft hydrogel cartilage is two semi-circular coverings, respectively covering the two A simulated femoral ankle. The present invention adopts a bionic design combining hard materials and soft materials, which can imitate the structure of the normal distal femur of the human body to the greatest extent. By using the combination of soft materials and corresponding stem cells, tissue engineering can be used in After implantation, it stimulates the generation of capillaries and improves the adaptability of the implant in the human body. Moreover, the combination of hydroxyapatite and titanium alloy can avoid the brittleness problem of single-material hydroxyapatite implants.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a multi-material porous distal femur implant and a manufacturing method thereof. Background technique [0002] The femur, as the longest long tubular bone in the human body, bears most of the load from the upper body of the human body, and is one of the extremely important bones of the human body. Due to some diseases or traumas, the femur is extremely prone to fractures, and these fractures are usually unable to recover by themselves. The best treatment method is to replace the defective part through femur replacement surgery. [0003] Most of the femoral prostheses currently used for replacement are single-material implants, which are usually made of a metal material (titanium and its alloys) or bioceramics (calcium hydroxyphosphate, zirconia), etc. Made of hard material. This type of implant is usually only implanted into the human body as a hard b...

AI Technical Summary

Problems solved by technology

This type of implant is usually only implanted into the human body as a hard bionic femur, and the implant made of pure ceramic material is very brittle, has poor mechanical properties, and is easy to break, while the titanium alloy-based material, And because the Young's modulus cannot match the natural bone, it is easy to produce stress shielding and make the implant loose

In addition, the cartilage part of the femur can only be replaced by using high molecular polymers, such as polyetheretherketone resin, etc., and this substitute can only reduce the friction between the femoral implant and the natural bone, but cannot Realize the function of cartilage, and through chemical bonding, it is easy to fall off, and there is a risk of postoperative revision

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