US5684061A
Expired / Lapsed
US
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Bone inducing material
Assignee: Kureha Corp
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Filing: 1996-09-26
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Granted: 1997-11-04
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Expires: 2016-09-26
Abstract
Abstract A bone inducing material comprising a piezoelectric porous membrane having through-holes of an average pore size of about 0.1 to 5 μm is disclosed. When the bone inducing material according to the present invention is used, bone is rapidly regenerated, and new formation of bone occurs. The bone inducing material is particularly useful in the dental field, for example, for treatment of periodontal diseases by GTR method.
Inventors
- 👤 Toshiyuki Ohnishi
- 👤 Nobuhiro Moriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:06
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2002/2821; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30087; Y; Y10; Y10S; Y10S310/00; Y10S310/80; Y10S623/00; Y10S623/92; Y10S623/923
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
72 words
A bone inducing material consisting essentially of a piezoelectric porous membrane having through-holes of an average pore size of about 0.1 to 5 μm and having porosity, defined as the ration (percentage) of voids in the apparent volume of the piezoelectric porous membrane, of about 40 to 90%, said piezoelectric porous membrane being composed of a piezoelectric polymer material or a composite material comprising a polymer material and piezoelectric inorganic particle materials.
Claim 2
Dependent Claim
72 words
A bone inducing material consisting essentially of a piezoelectric porous membrane having through-holes of an average pore size of about 0.1 to 5 μm and having porosity, defined as the ration (percentage) of voids in the apparent volume of the piezoelectric porous membrane, of about 40 to 90%, said piezoelectric porous membrane being composed of a piezoelectric polymer material or a composite material comprising a polymer material and piezoelectric inorganic particle materials.
Claim 3
Dependent Claim
38 words
A bone inducing material according to claim 1, wherein the piezoelectric polymer material is a polyvinylidene fluoride, a copolymer whose main component is a vinylidene fluoride, a polylactic acid, or a copolymer whose main component is lactic acid.
Claim 4
Dependent Claim
24 words
A bone inducing material according to claim 1, wherein the composite material is composed of a piezoelectric polymer material and piezoelectric inorganic particle materials.
Claim 5
Dependent Claim
23 words
A bone inducing material according to claim 3, wherein the piezoelectric inorganic particle material is lead zirconate titanate (PZT) ceramics or barium titanate.
Claim 6
Dependent Claim
24 words
A bone inducing material according to claim 1, wherein the piezoelectric porous membrane is prepared by polarizing a porous membrane sandwiched between dielectric sheets.
Claim 7
Dependent Claim
13 words
A bone inducing material according to claim 1, for inducing bone of periodontium.
Claim 8
Independent Claim
93 words
A method of inducing bone comprising placing a bone inducing material, which consists essentially of a piezoelectric porous membrane having through-holes of an average pore size of about 0.1 to 5 μm and having porosity, defined as the ratio (percentage) of voids in the apparent volume of the piezoelectric porous membrane, of about 40 to 90%, at a site where bone regeneration and/or new formation of bone is required, said piezoelectric porous membrane being composed of a piezoelectric polymer material or a composite material comprising a polymer material and piezoelectric inorganic particle materials.
Claim 9
Independent Claim
93 words
A method of inducing bone comprising placing a bone inducing material, which consists essentially of a piezoelectric porous membrane having through-holes of an average pore size of about 0.1 to 5 μm and having porosity, defined as the ratio (percentage) of voids in the apparent volume of the piezoelectric porous membrane, of about 40 to 90%, at a site where bone regeneration and/or new formation of bone is required, said piezoelectric porous membrane being composed of a piezoelectric polymer material or a composite material comprising a polymer material and piezoelectric inorganic particle materials.
Claim 10
Dependent Claim
38 words
A method of inducing bone according to claim 7, wherein the piezoelectric polymer material is a polyvinylidene fluoride, a copolymer whose main component is vinylidene fluoride, a polylactic acid, or a copolymer whose main component is lactic acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-03 | 2001-05-05 | 2001-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-03 | 2005-05-05 | 2005-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-03 | 2009-05-05 | 2009-11-04 | $7700.00 | Window Closed / Lapsed |