Porous implant filled with O-intersecting lines units

Abstract

A porous implant filled with O-intersecting lines units is mainly oriented to femoral stems and comprises a femoral stem end, a porous main body part and a screw positioning hole part, wherein the femoral stem end is used for positioning the porous implant, the screw positioning hole part is used for fixing the implant and a host, the porous main body part is a three-dimensional through porous network entity mainly formed by being filled with the O-intersecting lines units, the porous network entity comprises hollowed-out entities formed by scanning of O-intersecting lines unit cylinders penetrating through and crossing with one another in space, the hollowed-out entities are formed by pairwise perpendicular and linearly stacked O-intersecting lines unit cylinder surfaces, and the porous network entity has the pore diameter ranging from 400 mu m to 1,000 mu m, the unit wall thickness ranging from 80 mu m to 120 mu m and the porosity ranging from 55% to 85%. Thus, a porous network structure formed by stacking of the hollowed-out entities is close to a bone structure, has the high porosity, the high communication ratio and the larger surface contact area, is suitable for new bone ingrowth and circulation of nutrition tissue liquids and has the considerable clinical medical prospect.

Description

technical field [0001] The category of the present invention belongs to the field of biomedical devices, and relates to a porous implant, in particular to a porous implant filled with O-intersecting lines (cylindrical intersecting lines) units. Background technique [0002] The longest long tubular bone in the human body is the femur, which can be divided into two ends, similar bones such as the humerus. The femur, also known as the thigh bone, is mainly used to support the trunk and pelvis of the human body. It is the bone that bears the most weight and is extremely important in many animals such as humans. [0003] However, due to some unfavorable diseases or trauma, the femur fractures and causes a large area of ​​bone defect, and it cannot be healed by its own tissue, then bone grafting needs to be considered, especially for some elderly people, the best treatment method is artificial Bone or joint replacement can avoid postoperative avascular necrosis of the femoral he...

AI Technical Summary

Problems solved by technology

This design will inevitably lead to closed units, and closed units will not be suitable for bone tissue regeneration and ingrowth, etc., because for femoral models, it is very necessary to ensure the connectivity between bone trabeculae. In addition, it is difficult to generate uniform rules in this way unit, so it is difficult to ensure the uniformity of force

Images