Spine prosthesis based on 3D printing and making method thereof

Abstract

The invention discloses a spine prosthesis based on 3D printing and a making method thereof. The spine prosthesis comprises supporting frames, hollowed-out structures and fixing parts; each supportingframe is of a cavity-type main body stress structure formed by multiple transverse beams and longitudinal beams, each transverse beam comprises an upper bearing beam, a lower bearing beam and a middle transverse beam body, the upper bearing beams and the lower bearing beams are matched with the centrum surfaces in contact with the upper bearing beams and the lower bearing beams in dissection shape respectively, multiple longitudinal beams are distributed between the upper bearing beams and the lower bearing beams, and the middle transverse beam bodies are connected among the longitudinal beams; the hollowed-out structures are non-main-stress parts distributed among the supporting frames. According to the spine prosthesis, the upper and lower bearing beams are required to be designed in reference to the dissection shapes of the adjacent upper and lower centrum surfaces and completely attached to each other during installation, conical fixing spine structures are evenly distributed, theholding force is reinforced, and accordingly fixing is more stable; the main body structure is a waisted structure and is beneficial to effective conduction of a load and stress diffusion. The cavitydesign and opening design are adopted for the interior of the supporting frame, the supporting frame is used for containing the bone tissue, and synostosis of the upper and lower centrums is promoted.

Description

technical field [0001] The invention belongs to the technical field of medical implant prosthesis, and relates to a spinal prosthesis based on 3D printing and a preparation method thereof. Background technique [0002] Spinal tumors refer to primary and secondary tumors that occur in the spine. The overall incidence of primary spinal tumors is approximately 0.4%. The vast majority of adolescent spinal tumors are benign, while young and middle-aged patients are more likely to have malignant tumors. Benign tumors mostly involve the posterior structures, while malignant tumors mostly involve the vertebral bodies. Primary benign spinal tumors generally progress slowly and have a long course of disease; malignant spinal tumors progress faster, have a shorter course of disease, and appear faster in clinical symptoms, accounting for about 10% of new malignant bone tumors every year. For malignant spinal tumors that affect the stability of the spine, surgical tumor resection and ...

AI Technical Summary

Problems solved by technology

This point contact method causes a large pressure load on the surface of the vertebral body endplate, which is likely to cause structural damage to the vertebral body endplate and cause the titanium cage to penetrate into the vertebral body, causing the titanium cage to collapse (Xu Jianwei, Jia Lianshun, Chen Deyu, et al. Discussion on early collapse of titanium mesh bone graft in subtotal vertebral body resection[J]. Chinese Journal of Orthopedic Surgery, 2002,10(z1):1267-1269.)

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