Manufacturing method of composite material metal bone implant with structural function

Abstract

The invention provides a manufacturing method of a composite material metal bone implant with a structural function. The method comprises the following steps that bone defect image data are imported into a computer and are processed, and a three-dimensional model of a filling bone implant is established; according to the requirements of bone repairing, fixing and resetting, reliable bearing and bone healing promotion, the bone implant is divided into functional areas with different bearing and degradation characteristics, corresponding alloys are adopted for implant material design, pore units with different porosities are adopted for implant internal structure design, and three-dimensional models of parts in the different functional areas are established on the basis of considering assembling and surgical operations; the three-dimensional models of the different functional areas are subdivided, printing parameters are set according to materials and structures, printing data of all section contours are obtained, and the printing data are input into a laser powder bed fusion printer; and parts of the different functional areas are printed on the basis of the printing data, and alloy powder is printed and formed in a layer-by-layer powder feeding and layer-by-layer laser scanning melting and solidifying mode.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a method for manufacturing a composite material and a metal bone implant with structural functions. Background technique [0002] Bone is a dynamic tissue that is always in a state of change and renewal. Osteoclasts absorb bone, and osteoblasts generate new bone. Under stress stimulation, they form and maintain an optimal mechanical structure with maximum strength and minimum mass. Every year, tens of millions of patients suffer from bone defects worldwide due to trauma, tumor resection, and joint revision. Large-scale bone defects make it difficult for bones to repair themselves, which has become a thorny problem in orthopedics. In order to solve the above problems, orthopedic implants are generally used to replace and support missing and damaged bones and joints. These implants play an important auxiliary role in orthopedics, fixing body posture, and restoring normal bone func...

AI Technical Summary

Problems solved by technology

[0004]Additive manufacturing of degradable metal bone implants meets the structural and degradation requirements of bone defect repair, but the current research data on the degradation behavior of degradable metals in the human body Rarely, there is no reliable solution for how to match degradation behavior with bone remodeling process

If all degradable metals are used, once the bearing fails due to rapid degradation, the consequences will be disastrous

In addition, the mechanical properties of magnesium alloys and zinc alloys are still far behind the widely used bone fixation metal materials such as titanium alloys and stainless steel.

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