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Manufacturing method of artificial sclerite shaping implant made of polyvinyl plastics

A polyethylene plastic and manufacturing method technology, applied in bone implants, medical science, prostheses, etc., can solve the problems of brittleness, difficult forming and processing, flakes easily broken, etc., to improve tensile strength and impact resistance. Strength, easy attachment and growth, good biocompatibility

Active Publication Date: 2010-01-06
张勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The task of the present invention is to provide a kind of manufacturing method of the improved polyethylene plastic system artificial bone chip molding implant, it solves the traditional medical titanium alloy material, ceramic material, hydroxycalcium phosphate and other inorganic materials as bone graft material. Difficult to form and process, high elastic modulus, difficult to combine with human tissue, or brittle, poor impact strength, easy to break when made into thin slices and implanted in the body, etc.

Method used

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  • Manufacturing method of artificial sclerite shaping implant made of polyvinyl plastics

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0037] Install the bottom plate in a 120×100mm rectangular mold frame, then weigh and put about 10g of linear low-density polyethylene (LLDPE), the raw material model is DNDC-7150, and adjust the high-voltage electric rod to 50kV through vibration and scraping process , at a height of 50 mm from the raw material, cross-scan twice in the vertical and horizontal directions to complete the electrostatic orientation process, cover the upper template, and put it in a heating furnace for heating and sintering. When heating, apply a pressure of 0.12 MPa on the upper template, and the heating temperature is Between 140°C and 180°C for 60 to 105 minutes, then take the mold out of the heating furnace, let it cool naturally at room temperature to about 60°C, and finally release the mold to obtain a thin sheet with a thickness of about 1mm.

experiment example 2

[0039] Install the bottom plate in a 120×100mm rectangular mold frame, then weigh and put in about 20g of ultra-high molecular weight polyethylene (UHMWPE), the raw material model is HD450, and adjust the high-voltage electric rod to 60kV through vibration and scraping process. Raw materials at a height of 70 mm are cross-scanned twice in the vertical and horizontal directions to complete the electrostatic orientation process, cover the upper template, and put it in a heating furnace for heating and sintering. When heating, apply a pressure of 0.25 MPa on the upper template, and the heating temperature is 160 ° C. ~225°C, the time is 90-120 minutes, then take the mold out of the heating furnace, let it cool naturally at room temperature to about 80°C, and finally release the mold to obtain a thin sheet with a thickness of about 2mm.

experiment example 3

[0041] Install the bottom plate in a 120×100mm rectangular mold frame, then weigh and put 30g of high-density polyethylene (HDPE), the raw material model is DMDY-1158, and adjust the high-voltage electric rod to 40kV through vibration and scraping process. Raw materials at a height of 40 mm are cross-scanned twice in the vertical and horizontal directions to complete the electrostatic orientation process, cover the upper template, and put it into a heating furnace for heating and sintering. When heating, apply a pressure of 0.1 MPa on the upper template, and the heating temperature is 150 ° C. ~190°C, the time is 70~110 minutes, then take the mold out of the heating furnace, let it cool naturally at room temperature to about 50°C, and finally release the mold to obtain a thin sheet with a thickness of about 3mm.

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Abstract

The present invention relates to a method for making a vinyon artificial bone fragment molding implant, and the method comprises the steps of: (a) preparing the raw material: filtrating the thin particle vinyon in initial state, the surface of the obtained particle has a plurality of prominent bulges which is irregular ellipse grain shape; (b) preparing the mold which is composed of a mold frame, a top mold board and a lower mold plate; (c) adding material: spreading the filtrated raw material uniformly in the mold cavity after weighting; (d) orientating the electrostatic: opening the electrical power switch of the electrostatic generator and adjusting the electrical voltage, executing slow horizontal moving scanning with the electrode bar at the voltage output end at the upper side of the mold, the upright particles inclines along with the moving direction of the electrode bar and the plastic particles are arranged with regulated cross net shape; (e) closing the mold cover and inputting the mold to the heating furnace to sinter when the process of the electrostatic orientating has finished. The artificial bone fragment made with the method of the invention has a cellular structure with a definite shape, facilitates the adhering and growing of the human organization, has an excellent bioavailability and physical property.

Description

technical field [0001] The invention relates to a biomedical artificial bone chip, in particular to a method for making a biomedical artificial bone chip-shaped implant by using polyethylene plastic. Background technique [0002] At present, medical bone repair projects are mainly divided into two categories: artificial joints and bone graft materials. [0003] In recent years, foreign advanced countries such as POREX in the United States have used polyethylene plastics, such as linear low-density polyethylene (LLDPE), ultra-high molecular weight polyethylene (UHMWPE), high-density polyethylene (HDPE), etc. Implants such as artificial bone and artificial eye socket. These organic molecules composed of simple atoms of carbon and hydrogen can exhibit good physical and chemical properties through polymerization and cross-linking when the molecular weight reaches a certain level, and at the same time have good biocompatibility, safety and non-toxicity. It is said that some sci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/16A61F2/28
Inventor 李鸿宾
Owner 张勇
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