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US4960426A
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Osteofillers of hydroxy apatite
Assignee: Dental Kagaku KK
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Filing: 1989-06-05
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Granted: 1990-10-02
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Expires: 2009-06-05
Abstract
Abstract An osteofiller is characterized by using columnar sintered hydroxy-apatite having at least one capillary tube passed therethrough in the vertical direction.
Inventors
- 👤 Kiminori Atsumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0012; A61L; A61L27/00; A61L27/02; A61L27/12; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/3094; A61F2002/30968; A61F2310/00; A61F2310/00005; A61F2310/00179; A61F2310/00293
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
A porous osteofiller of high mechanical strength and improved bioaffinity , which osteofiller comprises an extruded columnar body of sintered hydroxy-apatite having a selected height and at least one capillary through-hole passing through said columnar body in the vertical direction.
Claim 2
Dependent Claim
40 words
A porous osteofiller of high mechanical strength and improved bioaffinity , which osteofiller comprises an extruded columnar body of sintered hydroxy-apatite having a selected height and at least one capillary through-hole passing through said columnar body in the vertical direction.
Claim 3
Dependent Claim
19 words
The osteofiller of claim 1, wherein said columnar body has a mechanical strength of 1000 kg/cm 2 or higher.
Claim 4
Dependent Claim
17 words
The osteofiller of claim 2, wherein said columnar body has a plurality of said capillary through holes.
Claim 5
Dependent Claim
29 words
The osteofiller of claim 2, wherein said columnar body has a diameter of 3 mm, with 90 of said capillary through holes, each having a diameter of 150 microns.
Claim 6
Dependent Claim
10 words
The osteofiller of claim 2 having a microporosity of 0.22.
Claim 7
Dependent Claim
29 words
The osteofiller of claim 2, wherein said columnar body has a diameter of 1 mm, with 550 of said capillary through holes, each having a diameter of 20 microns.
References Cited (Backward Citations)
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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) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |