Woven latticed nickel-titanium alloy vertebral body expander and preparation method thereof
A nickel-titanium alloy and dilator technology, applied in medical science, surgery, etc., can solve problems such as easily damaged vertebral body endplates, and achieve the effect of ensuring surgical safety, high safety, and avoiding bone puncture.
Inactive Publication Date: 2012-10-31
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
Each patent introduces a nickel-titanium memory alloy vertebral body distractor, but there is a danger of single-point distraction easily damaging the vertebral body endplate
Method used
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Embodiment
[0028] Such as figure 1 , figure 2 As shown, the braided mesh nickel-titanium alloy vertebral body dilator of the present invention is a mesh-like hollow cylinder structure. Nitinol is a shape memory alloy.
[0029] The braided mesh nickel-titanium alloy vertebral body dilator of the present invention can be prepared through the following steps:
[0030] (1) Prepare the original cylinder mold:
[0031] Such as image 3 As shown in the figure below, prepare a cylinder made of ABS plastic, and process several concave helixes crossing left and right along the surface of the cylinder, so that the circumferential surface of the cylinder forms grid-like grooves and weaves orbits, that is, the cylinder is obtained. Prototype;
[0032] (2) Prepare the paraffin counter-model of the cylinder original model:
[0033] prepare a piece like Figure 4 Shown metal sheet 1 with gap 2 (this metal sheet can adopt common thin copper sheet to prepare), the width (a) of gap 2 and cylinder f...
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Abstract
The invention discloses a woven latticed nickel-titanium alloy vertebral body expander and a preparation method thereof. The expander adopts a latticed hollow cylinder. The preparation method comprises the following steps: (1) preparing a cylinder master mold, (2) preparing a paraffin reverse mold of the cylinder master mold, (3) preparing a gypsum mold provided with a latticed groove winding andweaving track on the surface, and (4) preparing the woven latticed nickel-titanium alloy vertebral body expander. The preparation method for the expander is simple, convenient and feasible, and the prepared expander has the advantages of high security, low cost, simple structure and the like; since the expander adopts the latticed hollow cylinder structure, the compressed vertebral body can be evenly distracted to a certain height in the minimally invasive surgery, the danger that the end plate of vertebral body is easily damaged due to single-point distraction in the prior art is avoided, the problem that the expander is broken or punctured by bone is effectively avoided, and the cost of the expander is reduced when the security and the high success ratio of operation are ensured.
Description
technical field [0001] The invention relates to a minimally invasive medical instrument for treating spinal vertebral body compression fractures, in particular to a braided grid nickel-titanium alloy vertebral body expander and a preparation method thereof. Background technique [0002] my country has entered a stage of rapid population aging, and the incidence of vertebral compression fractures caused by osteoporosis has risen, seriously affecting the quality of life of the elderly. Osteoporotic compression fractures lead to decreased vertebral body height and kyphosis, which not only causes pain for several months, but also causes kyphosis, kyphosis, kyphosis, gait changes, and low respiratory function, which seriously affect the patient's social interaction , psychology, sleep and even life expectancy, all cause heavy economic burden and psychological burden to society and family. In recent years, minimally invasive methods have been applied at home and abroad to treat t...
Claims
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IPC IPC(8): A61B17/56A61B17/00A61L31/02
Inventor 高岩韩琪邓潮玉
Owner SOUTH CHINA UNIV OF TECH