Sintered body of titanium compound

a titanium compound and sintered body technology, applied in the field of titanium compounds, can solve the problems of low affinity with living tissues, low reactivity of titanium to living bodies, and difficulty in combining titanium with bone tissu

Inactive Publication Date: 2007-05-17
IMMUNO SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0023] Further, the present invention is the above-described production method, wherein the titanium compound is produced by adding an alkali to a solution containing a calcium ion, a titanium ion and phosphoric ion, thereby coprecipitating.

Problems solved by technology

However, titanium has low reactivity to a living body as described above, but on the other hand, has low affinity with a living tissue.
Therefore, it was difficult to unite titanium with a bone tissue.
In this case, however, it has been a current situation that a satisfactory bioadaptability is not obtained.
Further, it is known that of inorganic substances, there are some substances to be difficult to sinter the same alone as in β-TCP or the like.

Method used

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  • Sintered body of titanium compound
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Examples

Experimental program
Comparison scheme
Effect test

example 1

Production of Titanium Compound:

[0062] 0.1 mol of calcium nitrate (Ca(NO3)2) and 0.1 mol of titanium suflate (TiSO4) were dissolved in about 500 ml of water, followed by neutralizing with an alkali. After adding 0.06 mol of phosphoric acid (H3PO4), aqueous ammonia was added to adjust pH to 9.0, followed by stirring at 100° C. for 6 hours. The precipitates obtained was filtered off, and dried, thereby obtaining about 10 g of a powder of the titanium compound represented by the formula (1) or (2).

example 2

Sintering of Titanium Compound:

[0063] About 3 g of the powder of the titanium compound obtained in Example 1 was kneaded with purified water, and placed in a mold, molded, and then air-dried. The air-dried product was dried in a drying oven at 100° C. for 24 hours. The dried sample was placed in a vacuum heat-treating machine, and held at various temperatures under an atmospheric pressure or in vacuum (10−4 Pa) for 30 minutes to sinter the same. After stopping the heating, the sample was allowed to stand to room temperature. Regarding the sample sintered in vacuum, it was allowed to stand to room temperature, and after introducing argon gas, and was taken out. Regarding the sintered body of the titanium compound obtained, crystal analysis by X ray diffraction was conducted. FIG. 1 shows the result of X ray diffraction in the case of sintering at 1,300° C. in vacuum. Further, FIG. 1 also shows X ray diffraction patterns of perovskite and whitlockite. Further, the results are summar...

example 3

[0066] About 3 g of a powder of a titanium compound produced by a coprecipitation method was kneaded with purified water, placed in a mold, molded, and then air-dried. The air-dried product was dried in a drying oven at 100° C. for 24 hours. The dried sample was placed in a vacuum heat-treating machine, and held at various temperatures under an atmospheric pressure or in vacuum (10−4 Pa) for 15 minutes to sinter the same. After stopping the heating, the sample was allowed to stand to room temperature. Regarding the sample sintered in vacuum, it was allowed to stand to room temperature, and after introducing argon gas, and was taken out. Regarding the obtained sintered body of the titanium compound, microvickers hardness was measured. The results are shown in FIG. 2.

[0067] It is seen from FIG. 2 that a sintered body of a titanium compound, having high hardness is obtained. Further, it is seen that a sintered body having higher hardness can be obtained in the case of sintering in vac...

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Abstract

The present invention provides a sintered body of titanium compound obtained by sintering the titanium compound and a method for producing the same. A titanium compound represented by the formula (1) or (2) below is sintered.
[Ca10(PO4)6]TiO3.nH2O   (1)
[Ca10(PO4)6]TiO2(OH)2   (2)
(In the formulae, n is an integer of from 0 to 3). The obtained sintered body substantially consists of perovskite and whitlokite.

Description

TECHNICAL FIELD [0001] The present invention relates to a novel titanium compound. Further, the present invention relates to a sintered body of a titanium compound obtained by sintering the titanium compound, and a method for producing the same. Further, the present invention relates to an artificial bone material, an artificial joint material, an artificial tooth material or an artificial dental root (implant) material, constituted of those sintered bodies of the titanium compound. Further, the present invention relates to an artificial bone, an artificial joint, an artificial tooth or an artificial dental root, comprising those sintered bodies of the titanium compound. BACKGROUND ART [0002] Apatite has excellent bioaffinity and can directly be bonded to a bone tissue. Therefore, the apatite is widely used as a material for an artificial bone or an artificial dental root. Above all, calcium hydroxyapatite is a main component of a living hard tissue such as a bone or a tooth, and th...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61F2/28C04B35/00C09K3/00C04B35/465A61L27/00C01B25/32C04B35/447
CPCC04B35/447C04B2235/02C04B2235/3208C04B2235/3212C04B2235/3232C04B2235/3236C04B2235/447C04B2235/656C04B2235/658C04B2235/6581C04B2235/768C04B2235/80C04B2235/96A61L27/00C01B25/32C01G23/00
Inventor FUJITA, TATSUSHITAMURA, KENICHIMORISAKI, YURIKO
Owner IMMUNO SCI
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