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Preparation method of high-strength porous ceramic ocular prosthesis seat

A technology for porous ceramics and prosthetic eye sockets, which is applied in the preparation of porous ceramic spherical prosthetic eye sockets and the field of preparation of high-strength porous ceramic spherical prosthetic eye sockets, can solve the problems of complex preparation process, high density, and difficult product processing, etc. The process is simple, the development prospect is good, and the cost is low.

Inactive Publication Date: 2021-08-27
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] HA porous prosthetic eye sockets are usually prepared by particle accumulation, 3D printing, and casting molding. These methods usually have problems such as high density, small pore size, and complicated preparation processes.
At the same time, due to the low strength of the product (~2MPa), there is still a problem that the product is not easy to process, which leads to difficulties in mass production and high product prices

Method used

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  • Preparation method of high-strength porous ceramic ocular prosthesis seat
  • Preparation method of high-strength porous ceramic ocular prosthesis seat
  • Preparation method of high-strength porous ceramic ocular prosthesis seat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Stir 6gHA+4gCS bioceramic powder, 0.8g hydroxypropyl methylcellulose, 0.5g PMMA balls (size ~ 100μm), and 4.84g water to form a high-viscosity mixed ceramic slurry; pour the high-viscosity slurry into a rubber mold for molding , 6 hours after air drying, the green body (compressive strength of 4.8MPa) was obtained; the green body was first debonded at 600°C for 2 hours to remove the pore-forming agent, and then sintered at 1250°C for 2h to obtain a porous structure with a three-dimensional interconnected pore structure. Ceramic spherical prosthetic eye socket.

Embodiment 2

[0036] Stir 8gHA+2gCS bioceramic powder, 0.5g hydroxypropyl methylcellulose, 1gPMMA ball (size ~ 250μm), and 17.25g water to form a high-viscosity mixed ceramic slurry; pour the high-viscosity slurry into a rubber mold for molding, After 12 hours of air drying, the green body (compression strength of 1.3MPa) was obtained; the green body was first debonded at 600°C for 2 hours to remove the pore-forming agent, and then sintered at 1100°C for 2 hours to obtain a porous ceramic spherical shape with a three-dimensional interconnected pore structure. Prosthetic eye seat.

Embodiment 3

[0038] Stir 7gHA+3gCS bioceramic powder, 0.5g hydroxypropyl methylcellulose, 1gPMMA ball (size ~250μm), and 7.7g water to form a high-viscosity mixed ceramic slurry; pour the high-viscosity slurry into a rubber mold for molding, After air drying for 8 hours, the green body (compressive strength is 3.9MPa) was obtained; the green body was first debonded at 600°C for 2 hours to remove the pore-forming agent, and then sintered at 1250°C for 1 hour to obtain a porous ceramic with a three-dimensional interconnected pore structure Spherical prosthetic eye seat.

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Abstract

The invention relates to a preparation method of a high-strength porous ceramic ocular prosthesis seat, in particular to a preparation method of a porous ceramic spherical ocular prosthesis seat, which comprises the following steps: stirring and mixing biological ceramic powder, a binder, a pore forming agent and water to obtain high-viscosity slurry; pouring the obtained high-viscosity slurry into a spherical mold for molding, and drying to obtain a biscuit; and sintering the obtained biscuit at 1000-1300 DEG C for 1-2 hours, and crystallizing and forming the ceramic powder to obtain the porous ceramic spherical ocular prosthesis seat with a three-dimensional communicated pore structure.

Description

technical field [0001] The invention relates to a preparation method of a porous ceramic spherical artificial eye seat, in particular to a preparation method of a high-strength porous ceramic spherical artificial eye seat, which belongs to the field of biological material preparation. Background technique [0002] Eye trauma or disease will lead to eyeball enucleation. In order to avoid eye distortion caused by eyeball enucleation, it is an ideal solution to implant an eye prosthesis. The artificial eye seat is usually spherical, and needs to have large interconnected pores of 50-500 μm, a porosity of ≥70%, a compressive strength of ≥2 MPa and a low density. [0003] At present, the prosthetic eye sockets used clinically are mainly solid spheres represented by silica gel and porous bioceramic spherical prosthetic sockets represented by hydroxyapatite (HA). Our country also has coral, animal bone or chemically synthesized HA as raw material to prepare porous HA prosthetic ey...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/447C04B35/622
CPCC04B38/067C04B35/447C04B35/622C04B2235/3454C04B2235/6022C04B2235/5436C04B2235/5427C04B2235/656C04B2235/6567C04B2235/61C04B2235/95C04B2235/96
Inventor 左开慧曾宇平尹金伟夏咏峰姚冬旭梁汉琴
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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