Multi-material porous distal femur implant and manufacturing method thereof

Abstract

The invention discloses a multi-material porous distal femur implant and a manufacturing method thereof. The implant comprises a hard gradient porous distal femur implantation trunk and soft hydrogel cartilage; the hard gradient porous distal femur implantation trunk is of a porous structure, and the outer contour includes a conical femur body and two quasi-sphere-like imitated femur ankles; the soft hydrogel cartilage includes two semi-circular-ring-shaped coverings, and the two semi-circular-ring-shaped coverings are covered with the two imitated femur ankles respectively. According to the multi-material porous distal femur implant, the bionic design that a hard material and a soft material are combined is adopted, the structural composition of the normal distal femur of a human body can be imitated to the maximum extent; by adopting a way of combining the soft material and corresponding stem cells, after being implanted, the soft material can be stimulated through tissue engineering to generate blood capillaries, so that the adaptability of the implant in the human body is improved; and moreover, by adopting a way of combining hydroxyapatite and titanium alloy, the brittleness problem of a single-material hydroxyapatite implant can be avoided.

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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