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Ceramic material and process for manufacturing

A ceramic material and slurry technology, used in the field of plastic surgery and dentistry, can solve problems such as insufficient mechanical strength

Inactive Publication Date: 2005-06-15
DOXA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their mechanical strength is insufficient

Method used

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  • Ceramic material and process for manufacturing
  • Ceramic material and process for manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] This example describes the preparation of a ceramic material consisting of calcium aluminate hydrate and varying amounts of titanic acid, as well as the mechanical properties of this material.

[0096] The ingredients we selected were purchased from Lafarge Aluminates' Ternal White  . This is an Al 2 o 3 / CaO is about 70 / 30 calcium aluminate, however, any other similar calcium aluminate powder will give similar results.

[0097] These powder particles were reduced in size by ball milling. 90% of the ground powder is smaller than 10 μm.

[0098] Grinding is accomplished in a rotating cylindrical shaped vessel, which is filled to one third of its volume with powder and approximately one third of its volume to inert silicon nitride grinding balls approximately 10 mm in diameter. The grinding liquid is isopropanol. The total milling time was 3 days.

[0099] After grinding, the ground bodies were sieved and the alcohol was evaporated to dryness. The milled powder w...

Embodiment 2

[0107] This example describes hydrated CA materials incorporating various amounts of calcium phosphate and their mechanical properties.

[0108] The Ternal White type CA powder of Lafarge Aluminates was prepared according to the same procedure as in Example 1.

[0109] Calcium phosphate powder (Ca5(PO 4 ) 3 OH) in proportions of 10, 20 and 50 wt.%. CA prepared in a similar manner without the addition of a phosphate additive was used as a control. The same reagent as in Example 1 was added to water. Its w / c ratio was 0.4 relative to the weight of the powder.

[0110] As in Example 1, the powder-water mixture was cured at 37°C in a water-saturated environment in a container capable of holding about 10 g of material.

[0111] Hardness results are shown in Table 3. As shown in the table, the positive effect of the calcium phosphate additive on hardness was evident after two weeks of curing. Calcium phosphate additives enhance hardness.

[0112] Material compositio...

Embodiment 3

[0114] This example illustrates that calcium titanate (CT) additives can reduce temperature generation during CA curing. The Ternal White type CA powder of Lafarge Aluminates was prepared according to the same procedure as in Example 1. Powder mixtures containing 30 wt.% and 50 wt.% titanate were prepared in the same way.

[0115] The powder mixture was mixed with deionized water, and the weight ratio of water to CA powder was kept constant at 0.5.

[0116] For all powder mixtures, an accelerator LiCl in the form of a lithium salt was added in deionized water. This increases the curing time to approximately 10 minutes. To account for the influence of surrounding media, curing was done in air and water.

[0117] The water-powder mixture solidifies in shaped containers, each containing approximately 10 g of the mixture. During the curing of the ceramic, the temperature at the center of the ceramic body was measured with a thermocouple. figure 1 CA with 0, 30 or 50 wt.% CT, ...

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Abstract

The present invention relates to a chemically bonded ceramic material based on calcium aluminate hydrate, in which calcium titanate is mainly added, and chemically similar compounds thereof. The material is a biocompatible material that can be used for implants, especially in orthopedics and dentistry. The material of the present invention has the properties required for a biocement for orthopedics. It is cured by reacting with water, which can increase the strength in a short time. It has good plasticity before curing, stable forming, less heat generated during the curing process, and no repulsion with adjacent tissues.

Description

field of invention [0001] The present invention relates to a ceramic material based on calcium aluminate hydrate, which is suitable for use in implantology, especially in the orthopedic and dental fields. The invention also relates to products made at least partly of this material. Background technique [0002] biological cement [0003] In orthopedics in particular, there is a need for biomaterials that can be finished in a clinical setting for end use, such as compounds that can be finalized in surgery. Once formed, these materials should harden, or solidify, whether exposed at the surgical site or within the body. There is currently no generally accepted name for this material. The term bone cement generally refers to a cement based on defined polymers, which are commonly used to fix hip implants to the femur. Biocement generally refers to usable, biocompatible materials that cure in situ through chemical reactions, including ceramic compounds, as described below. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C13/083A61K6/17A61K6/75A61K6/802A61K6/86A61K6/876A61L24/00A61L24/02A61L27/00C04B28/06C04B28/34
CPCA61L24/02C04B28/06C04B28/34C04B2111/00836C04B2201/52A61K6/17A61K6/75A61K6/802A61K6/86A61K6/876Y02W30/91C04B14/043C04B14/305C04B18/146C04B22/124C04B24/2641C04B14/306C04B2103/10C04B2103/302C04B14/30C04B2103/32C04B7/32A61K6/887C08L33/08A61L27/10
Inventor N·阿克森L·赫尔曼森T·佩尔森K·比约尔克伦德L·克拉夫特
Owner DOXA AB
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