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Preparation method of cage by embedded grade granular PEEK

A technology of intervertebral fusion device and polyetheretherketone, applied in bone implants, medical science, prostheses, etc., can solve the problems of chip scrapping, high cost, and low production efficiency, and meet the requirements of high strength and high plasticity Requirements, large elastic limit force, and low production cost

Inactive Publication Date: 2011-07-20
林芳寿
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] This method has the following problems: 1. Its heat preservation and pressure holding time is controlled at 1 to 3 hours. Actual testing shows that the workpiece has degraded, and its strength and plasticity cannot meet the requirements of the implantation level; High temperature mixing and extrusion in extruder
3. Neither the processing equipment nor the processing environment considers the problem of anti-pollution
However, this machining method has the following disadvantages: 1. The long-term contact of coolant, workpiece, fixture and tool during machining, and the unclean environment of machining may all become sources of pollution; 2. Most of the expensive materials It is scrapped as chips (to prevent pollution, chips cannot be recycled), so the cost is extremely high; 3. The surface finish of the workpiece is poor; 4. The production efficiency is low

Method used

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  • Preparation method of cage by embedded grade granular PEEK
  • Preparation method of cage by embedded grade granular PEEK
  • Preparation method of cage by embedded grade granular PEEK

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Embodiment Construction

[0035] A method for preparing an intervertebral fusion device with implantable-grade granular polyether ether ketone, comprising the steps of:

[0036] Step 1: The mold is made of high-chromium medium-carbon heat-resistant steel, tempered at 400-410°C after quenching, and the hardness is ≥ Rc.40. Ultrasonic cleaning with distilled water and chemical pure ethanol before use, and placed in a 100,000-level clean room before cleaning, dried and placed in a 10,000-level clean box for loading.

[0037] Step 2: Rapidly raise the temperature of the mold and the polyetheretherketone inside to 390°C. The heating time from 340℃ to 390℃ is: anterior cervical ≤4 minutes, lumbar posterior ≤4 minutes, lumbar anterior ≤6 minutes, heat preservation: anterior cervical 2 minutes, lumbar posterior 2 minutes, lumbar anterior 3 minute.

[0038] Step 3: Pressurize after heat preservation to eliminate the granular boundary of polyether ether ketone. Pressure: 50Mpa on the front of the neck, 50Mpa ...

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Abstract

The invention discloses a method for preparing interbody fusion cage by using implantation-grade polyether ether ketone (PEEK). The preparation method comprises the following steps: step 1, filling weighed PEEK granule in a mould; step 2, heating the mould and the PEEK therein to a molten state; step 3: pressurizing the PEEK to 10 to 60MPa in the molten state; step 4, cooling down the PEEK in the pressure state of step 3 to realize full crystallization of the PEEK, and keeping the molten duration of the PEEK less than or equal to 30 minutes; and step 5, demoulding the cooled mould. Implantation-grade PEEK product processed by the preparation method has the advantages of complete crystallization, no degradation, high strength, high plasticity and no pollution.

Description

technical field [0001] The invention relates to a preparation method of an implant grade material, in particular to a method for preparing an intervertebral fusion device with implant grade granular polyetheretherketone, especially suitable for preparing the polyetheretherketone intervertebral fusion device. Background technique [0002] Implantable polyether ether ketone material (PEEK-OPTIMA) produced by British INVIBIO company tm ), has a very significant material advantage in clinical applications. Including: extremely high strength, rigidity, wear resistance, aging resistance under hot pressing, creep resistance, fatigue resistance, corrosion resistance and hydrolysis, etc., can be fully qualified for various complex, uneven thickness The demanding requirements of small form factor medical implants. Secondly, the elastic modulus of polyetheretherketone is very close to that of bone, which is better than any other material, and it can quickly fuse with tissue. Thirdly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C43/02B29C43/58B29C43/52B29C43/36B29C33/38B29C43/32A61L27/18A61F2/28B29K71/00
Inventor 林芳寿
Owner 林芳寿
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