Individual customized bionic transplantation bone block for filling long bone defect

Abstract

The invention discloses an individual customized long bone defect filling bionic transplantation bone block which has biological compatibility, is of a topological optimization structure and comprises a supporting cylinder, a middle filling body and an inner filling body from outside to inside. The supporting cylinder is of a compact cylindrical structure, connecting parts which are in socket joint with connected bone cortex are arranged at the two ends of the supporting cylinder, fusion parts are further arranged at the two ends of the inner wall of the supporting cylinder, the fusion parts are annular and are made of degradable materials of porous lattice structures, and the outer side end faces of the fusion parts make contact with the end faces of the connected bone cortex; the middle filling body is arranged in the supporting cylinder, is filled between the two fusion parts and is made of a degradable material, the inner filling body is filled in the middle filling body, the two ends of the inner filling body do not stretch into the fusion parts, and the middle filling body and the inner filling body are formed by stacking a plurality of porous unit cell units. A compact non-degradable material and a loose porous degradable material are combined, the mechanical property of the material is optimized through a topological structure, meanwhile, growth simulation of the material is achieved through different lattice morphological characteristics, and rapid osteogenesis is promoted.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an individual customized bionic graft bone block for filling long bone defects. Background technique [0002] In clinical practice, multiple fractures of the long bone diaphysis are a type of surgery that is very difficult to uncover and reduce, and the usual plan is to do only simple functional reduction. After reset, the weight-bearing capacity of the limbs will be much worse than before. [0003] With the rapid development of biomaterials and digital medical technology in recent years, bionic prostheses with porous structures have developed rapidly, bringing hope to the rehabilitation of many patients. Existing long bone backbone prostheses are usually custom-made, according to the patient's bilateral long bone CT data, mirror the bone model of the healthy side of the patient to the affected side, restore the shape of the affected side before the disease one by one th...

AI Technical Summary

Problems solved by technology

The metal prosthesis is in linear contact with the bone contact surface due to its homogeneous porous structure, such as a bone filling block disclosed in Chinese utility model patent ZL202021832757. Heal, eventually leading to surgical failure

Although the degradable material has a high degree of integration with bone, due to the poor structural performance of the existing technology, it cannot bear a large force, and cannot meet the requirements of strength, stiffness, and elastic modulus of the bone defect site, and affects the bone length. implantation and long-term osseointegration of implants in humans

Images