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Device and method for preparing monodisperse spherical porous beta-TCP particles

A monodisperse, particle-based technology, applied in the field of devices for preparing monodisperse spherical porous β-TCP particles, can solve the problems of lack of pores for bone tissue growth, uneven particle size, and low surface sphericity, and achieve pore connectivity Favorable, high surface sphericity, high fluidity effect

Active Publication Date: 2015-03-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the non-uniform particle size that is easy to occur in the preparation process of β-TCP particles, the surface sphericity is low, the surface has edges and corners, resulting in uneven force and easy to produce cracks, dense particle organization, lack of bone tissue growth. Insufficient pores, etc., and provide a device and method for preparing monodisperse spherical porous β-TCP particles

Method used

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  • Device and method for preparing monodisperse spherical porous beta-TCP particles
  • Device and method for preparing monodisperse spherical porous beta-TCP particles
  • Device and method for preparing monodisperse spherical porous beta-TCP particles

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Embodiment 1

[0045] The suspension prepared by β-TCP powder, deionized water and ammonium polyacrylate is transferred to crucible 3 (such as figure 1 Shown), the size of the hole 6 on the baffle plate 7 is selected according to the size of the required β-TCP particles, and the amount of the suspension reaches 3 / 4~4 / 5 of the crucible molten pool 4.

[0046] Adjust the parameters of the pulse signal, choose the trapezoidal wave as the waveform (such as figure 2 shown), parameter values: rising edge 100~250μs, holding edge 700~1000μs, falling edge 1000~1200μs, frequency setting 1~10Hz, differential pressure control between 1~10Torr.

[0047] Utilize the differential pressure control system, pass the inert gas argon into the molten pool 4 through the upper vent pipe 11, so that a differential pressure of 1 kPa is generated with the vacuum chamber in the outer casing 5; apply an external pulse driving signal to the piezoelectric ceramic 1, Under its excitation, the piezoelectric ceramic 1 pro...

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Abstract

The invention discloses a device for preparing monodisperse spherical porous beta-TCP particles. The device comprises an outer shell as well as a crucible and a collection bin which are arranged in the outer shell, wherein the collection bin is arranged at the bottom of the outer shell, and the crucible is arranged at the upper part of the collection bin; a stirring bar is arranged in the crucible, and the upper end of the stirring bar is connected with piezoelectric ceramic; an opening is formed in the bottom of the crucible, and a baffle is also arranged at the bottom of the crucible; a hole is formed in the baffle, and an upper vent tube is arranged at the upper part of the outer shell; a lower vent tube is arranged at the middle lower part of the outer shell, and a pump body is also arranged at the bottom of the outer shell. The invention also discloses a method for preparing the monodisperse spherical porous beta-TCP particles. The method comprises the following steps of pre-processing of raw powder, suspension configuration, POEM ejection, and collection of particles and sintering. The beta-TCP particle prepared by the invention has the advantages of communicated porous structure, uniform and controllable particle size, high surface sphericity and the like.

Description

technical field [0001] The invention relates to particle preparation, in particular to a device and method for preparing monodisperse spherical porous β-TCP particles. Background technique [0002] As a bone repair material, calcium phosphate cement (Calcium Phosphate Cement, CPC) has excellent properties such as good biocompatibility, non-toxicity, non-carcinogenicity, osteoconduction, and arbitrary shaping in bone defects. However, the low strength of CPC after curing limits its application. Therefore, improving the mechanical properties has become a hot spot in its research. [0003] At present, calcium phosphate bone cement is mainly reinforced by adding inorganic ions, inorganic particles, biopolymer active substances, fiber composite reinforcement, etc. to bone cement, but these reinforcing agents are often non-degradable or difficult to degrade The bioactivity and bone-forming ability of the material, and these non-degradable components may be deposited in the tissue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/56A61L27/12C04B35/447C04B35/622C04B38/00
Inventor 董伟许富民张广会盖如坤
Owner DALIAN UNIV OF TECH
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