Memory alloy tube for manufacturing expandable vertebral stent

Abstract

The invention discloses a memory alloy tube for making an expandable vertebral body stent, which is integrally made of nickel-titanium temperature memory alloy, and is characterized in that the memory alloy tube includes a cylindrical outer wall tube, and The inner lumen inside the tube; the outlets at both ends of the inner lumen are respectively located on the circular end faces of the first end and the tail end of the cylindrical outer tube wall; the inner lumen can be cut, molded, 3D printed or polished craft made. The advantage of the present invention is that the change of the internal structure of the bracket, the manufacture of brackets with different structural strengths and vertebral body structures, the rules of vertebral body fractures, and the connection between tail end material filling and injection of filling materials are solved at one time, and according to clinical conditions of patients of different ages The bone regeneration ability and mechanical strength of the vertebral body can be adjusted to obtain stents with different wall thicknesses.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a memory alloy tube for making expandable vertebral body brackets. Background technique [0002] In the previous research, we designed a series of memory alloy vertebral body expandable brackets: nickel-titanium temperature memory alloy vertebral body compression fracture orthopedic resetter and device (ZL 200610024715.6), vertebral body expandable orthopedic resetter (ZL200820006206.5), Expandable vertebral body stent (ZL 201020106368.3), and expandable reduction stent implanted in spinal lesion vertebral body (ZL 200720067399.0). [0003] In the above-mentioned patent design, the design and related experiments were done on the support with tubes and plates. However, in practical applications, there are still problems requiring different designs of scaffolds under different bone quality conditions. For example, the bone regeneration ability of young adults is good, and ...

AI Technical Summary

Problems solved by technology

For most young and middle-aged patients, the anterior edge of the vertebral body collapses, and it is necessary to increase the supporting strength of the anterior edge of the collapsed part, and to fill the bone material through the tail end. question

The bracket tail pipe developed by the pipe with parallel pipe wall is narrow, and the filling material is prone to filling difficulties, and even the actual operation is difficult to realize

However, there is a joint problem at the end of the support developed by the plate, which may cause leakage of material filling and non-cohesion in operation.

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