US5092888A
Expired / Lapsed
US
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Hardening material
Assignee: TOKUYAMA SODA A CORP OF JAPAN KK
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Filing: 1990-05-17
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Granted: 1992-03-03
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Expires: 2010-05-17
Abstract
Abstract Disclosed is a hardening material comprising (a) a powder component composed of a powdery mixture of tetracalcium phosphate and calcium phosphate having a Ca/P atomic ratio lower than 1.67 and (b) a liquid component composed of a colloidal aqueous solution comprising solid colloid particles dispersed in an aqueous medium, wherein said components (a) and (b) are independently packed and both the components are mixed for hardening. This hardening material can give a hardened body having a high strength without showing any harmful action on a living body. Accordingly, this hardening material is especially effectively used for the restoration of a hard tissue of a living body.
Inventors
- 👤 Osamu Iwamoto
- 👤 Yasuhiro Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:10
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/46; A61K; A61K6/00; A61K6/70; A61K6/71; A61K6/74; A61K6/75; A61K6/77; A61K6/80; A61K6/849; A61K6/876; A61L24/00; A61L24/0047; A61L24/0073; A61L24/0084; A61L24/02; A61L27/02; A61L27/12; C; C04; C04B; C04B28/00; C04B28/34; C04B28/344; A61F; A61F2310/00; A61F2310/00005; A61F2310/00179; A61F2310/00293; C04B2111/00; C04B2111/00474; C04B2111/00836
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
64 words
A hardening material comprising (a) a powder component composed of a powdery mixture of tetracalcium phosphate and calcium phosphate having a Ca/P atomic ratio lower than 1.67 and (b) a liquid component composed of a colloidal aqueous solution comprising solid colloid particles dispersed in an aqueous medium, wherein said components (a) and (b) are independently packed and both the components are mixed for hardening.
Claim 2
Dependent Claim
64 words
A hardening material comprising (a) a powder component composed of a powdery mixture of tetracalcium phosphate and calcium phosphate having a Ca/P atomic ratio lower than 1.67 and (b) a liquid component composed of a colloidal aqueous solution comprising solid colloid particles dispersed in an aqueous medium, wherein said components (a) and (b) are independently packed and both the components are mixed for hardening.
Claim 3
Dependent Claim
47 words
A hardening material as set forth in claim 1, wherein the average particle size of the tetracalcium phosphate is from 0.1 to 100 μm and the average particle size of the calcium phosphate having a Ca/P atomic ratio lower than 1.67 is from 0.1 to 50 μm.
Claim 4
Dependent Claim
25 words
A hardening material as set forth in claim 1, wherein the average particle size of the colloid particles is from 1 nm to 1 μm.
Claim 5
Dependent Claim
29 words
A hardening material as set forth in claim 1, wherein the concentration of the solid colloid particles in the colloidal aqueous solution is from 5 to 60% by weight.
Claim 6
Dependent Claim
30 words
A hardening material as set forth in claim 1, wherein the colloidal aqueous solution is selected from the group consisting of a silica sol, alumina sol and a polymer latex.
Claim 7
Dependent Claim
77 words
An implantable hardening material for the restoration of a hard tissue of a living body, which comprises (a) a powder component composed of a powdery mixture of tetracalcium phosphate and calcium phosphate having a Ca/P atomic ratio lower than 1.67 and (b) a liquid component composed of a colloidal aqueous solution comprising solid colloid particles dispersed in an aqueous medium, wherein said components (a) and (b) are independently packed and both the components are mixed for hardening.
Claim 8
Dependent Claim
77 words
An implantable hardening material for the restoration of a hard tissue of a living body, which comprises (a) a powder component composed of a powdery mixture of tetracalcium phosphate and calcium phosphate having a Ca/P atomic ratio lower than 1.67 and (b) a liquid component composed of a colloidal aqueous solution comprising solid colloid particles dispersed in an aqueous medium, wherein said components (a) and (b) are independently packed and both the components are mixed for hardening.
Claim 9
Dependent Claim
25 words
The hardening material as set forth in claim 1, wherein the calcium phosphate is selected from CaHPO 4 ·2H 2 O and CaHPO 4 .
Claim 10
Dependent Claim
26 words
The hardening material of claim 1, wherein the Ca/P atomic ratio of tetracalcium phosphate and calcium phosphate is in the range of from 1.3 to 1.8.
Claim 11
Dependent Claim
39 words
The hardening material as set forth in claim 1, wherein the average particle size of the tetracalcium phosphate is from 0.5 to 50 μm and the average particle size of the calcium phosphate is from 0.1 to 10 μm.
Claim 12
Dependent Claim
21 words
The hardening material as set forth in claim 1, wherein the aqueous solution is selected from alumina sol and silica sol.
Claim 13
Dependent Claim
29 words
The hardening material as set forth in claim 1, wherein the concentration of the solid colloidal particles in the colloidal aqueous solution is from 10 to 50% by weight.
Claim 14
Dependent Claim
25 words
The hardening materials as set forth in claim 6, wherein compounds (a) and (b) are combined in a mixing ratio of from 0.5 to 5.
Claim 15
Dependent Claim
23 words
The hardening material as set forth in claim 6, wherein the mixing ratio of components (a) and (b) is from 2 to 4.
Claim 16
Dependent Claim
21 words
The hardening material of claim 1, further comprising a constituent selected from barium sulfate, barium glass, strontium glass, zirconia and iodoform.
Claim 17
Dependent Claim
30 words
The hardening material of claim 14, wherein the constituent is added in an amount of 10 to 50 parts by weight per 100 parts by weight of the hardening material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |