US4365356A
Expired / Lapsed
US
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Prosthesis parts provided with a coating of a bio-active material
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1980-07-21
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Granted: 1982-12-28
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Expires: 2000-07-21
Abstract
Abstract Disclosed are novel prosthesis parts of improved properties which are obtained by providing a material as used for prosthesis with an enamel or enamel-like coating and incorporating in said enamel layer, while in a viscous state, a bio-active material. Such prosthesis parts have a satisfactory adhesive strength and coefficient of expansion, are substantially free of pores, are highly corrosion resistant, and readily grow intimately and firmly together with the bone tissue without the use of bone cement.
Inventors
- 👤 Heinz Broemer
- 👤 Werner Adam
- 👤 Friedhelm Hedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:46
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5022; A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; C04B41/80; C04B41/81; C04B41/85; C04B41/86; C23; C23D; C23D5/00; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30037; A61F2002/30929; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00389; A61F2310/00592; A61F2310/00928; A61F2310/00934; Y; Y10; Y10S; Y10S623/00; Y10S623/92; Y10S623/923
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
88 words
A prosthesis working piece comprising: a structural core element; at least one carrier layer substantially free of pores applied to said core element, said carrier layer comprising an inorganic enamel which is compatible with the body; and a multitude of particles of a bio-active material at least partly embedded in said carrier layer to provide a multitude of exposed areas of the particles on which the bone tissue can grow together with the prosthesis, said bio-active material particles having a particle size of at least about 50 μm.
Claim 2
Dependent Claim
88 words
A prosthesis working piece comprising: a structural core element; at least one carrier layer substantially free of pores applied to said core element, said carrier layer comprising an inorganic enamel which is compatible with the body; and a multitude of particles of a bio-active material at least partly embedded in said carrier layer to provide a multitude of exposed areas of the particles on which the bone tissue can grow together with the prosthesis, said bio-active material particles having a particle size of at least about 50 μm.
Claim 3
Dependent Claim
21 words
A prosthesis working piece according to claim 1, wherein said bio-active material particles protrude from the surface of said carrier layer.
Claim 4
Dependent Claim
25 words
A prosthesis working piece according to claim 1, wherein the surfaces of said bio-active material particles are flush with the surface of said carrier layer.
Claim 5
Dependent Claim
24 words
A prosthesis working piece according to claim 1, wherein said bio-active material particles have a particle size between about 50 μm and 250 μm.
Claim 6
Dependent Claim
24 words
A prosthesis working piece according to claim 4, wherein said bio-active material particles have a particle size between about 80 μm and 180 μm.
Claim 7
Dependent Claim
17 words
A prosthesis working piece according to claim 1, wherein said bio-active material comprises a bio-glass ceramic composition.
Claim 8
Dependent Claim
124 words
A prosthesis working piece according to claim 1, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 ) from about 50 to 65 weight % Boron trioxide (B 2 O 3 ) from about 0 to 12 weight % Phosphorous pentoxide (P 2 O 5 ) from about 0 to 3 weight % Sodium oxide (Na 2 O) from about 3 to 12 weight % Potassium oxide (K 2 O) from about 0 to 5 weight % Calcium oxide (CaO) from about 0 to 3 weight % Barium oxide (BaO) from about 0 to 1 weight % Aluminum oxide (Al 2 O 3 ) from about 2 to 7 weight % Titanium dioxide (TiO 2 ) from about 6 to 14 weight %.
Claim 9
Dependent Claim
79 words
A prosthesis working piece according to claim 7, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 )--60.0 weight % Boron trioxide (B 2 O 3 )--7.5 weight % Phosphorous pentoxide (P 2 O 5 )--1.5 weight % Sodium oxide (Na 2 O)--9.0 weight % Potassium oxide (K 2 O)--3.5 weight % Calcium oxide (CaO)--1.0 weight % Barium oxide (BaO)--0.5 weight % Aluminum oxide (Al 2 O 3 )--5.0 weight % Titanium dioxide (TiO 2 )--12.0 weight %.
Claim 10
Dependent Claim
137 words
A prosthesis working piece according to claim 1, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 ) from about 35 to 45 weight % Boron trioxide (B 2 O 3 ) from about 4 to 8 weight % Magnesium metaphosphate (Mg(PO 3 ) 2 ) from about 6 to 12 weight % Lithium oxide (Li 2 O) from about 1 to 5 weight % Sodium oxide (Na 2 O) from about 4 to 12 weight % Magnesium oxide (MgO) from about 0 to 3 weight % Calcium oxide (CaO) from about 12 to 20 weight % Bismuth trioxide (Bi 2 O 3 ) from about 1 to 5 weight % Titanium dioxide (TiO 2 ) from about 4 to 12 weight % Cryolite (Na 3 AlF 6 ) from about 3 to 7 weight %.
Claim 11
Dependent Claim
87 words
A prosthesis working piece according to claim 9, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 )--38 weight % Boron trioxide (B 2 O 3 )--6 weight % Magnesium metaphosphate (Mg(PO 3 ) 2 )--10 weight % Lithium oxide (Li 2 O)--3 weight % Sodium oxide (Na 2 O)--10 weight % Magnesium oxide (MgO)--1 weight % Calcium oxide (CaO)--16 weight % Bismuth trioxide (Bi 2 O 3 )--3 weight % Titanium dioxide (TiO 2 )--8 weight % Cryolite (Na 3 AlF 6 )--5 weight %.
Claim 12
Dependent Claim
139 words
A prosthesis working piece according to claim 1, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 ) from about 12 to 20 weight % Boron trioxide (B 2 O 3 ) from about 10 to 18 weight % Phosphorous pentoxide (P 2 O 5 ) from about 22 to 28 weight % Lithium oxide (Li 2 O) from about 2 to 6 weight % Sodium oxide (Na 2 O) from about 8 to 16 weight % Potassium oxide (K 2 O) from about 1 to 5 weight % Magnesium oxide (MgO) from about 0 to 3 weight % Aluminum oxide (Al 2 O 3 ) from about 14 to 20 weight % Titanium dioxide (TiO 2 ) from about 5 to 10 weight % Cryolite (Na 3 AlF 6 ) from about 0 to 2 weight %.
Claim 13
Dependent Claim
89 words
A prosthesis working piece according to claim 11, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 )--15.25 weight % Boron trioxide (B 2 O 3 )--13.84 weight % Phosphorous pentoxide (P 2 O 5 )--24.70 weight % Lithium oxide (Li 2 O)--3.21 weight % Sodium oxide (Na 2 O)--13.18 weight % Potassium oxide (K 2 O)--2.99 weight % Magnesium oxide (MgO)--1.17 weight % Aluminum oxide (Al 2 O 3 )--17.93 weight % Titanium dioxide (TiO 2 )--7.43 weight % Cryolite (Na 3 AlF 6 )--0.30 weight %.
Claim 14
Dependent Claim
116 words
A prosthesis working piece according to claim 1, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 ) from about 8 to 16 weight % Boron trioxide (B 2 O 3 ) from about 6 to 14 weight % Magnesium metaphosphate (Mg(PO 3 ) 2 ) from about 7 to 15 weight % Calcium metaphosphate (Ca(PO 3 ) 2 ) from about 35 to 45 weight % Lithium oxide (Li 2 O) from about 3 to 6 weight % Sodium oxide (Na 2 O) from about 10 to 16 weight % Potassium oxide (K 2 O) from about 3 to 6 weight % Titanium dioxide (TiO 2 ) from about 4 to 10 weight %.
Claim 15
Dependent Claim
76 words
A prosthesis working piece according to claim 13, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 )--10.6 weight % Boron trioxide (B 2 O 3 )--8.5 weight % Magnesium metaphosphate (Mg(PO 3 ) 2 )--9.8 weight % Calcium metaphosphate (Ca(PO 3 ) 2 )--41.5 weight % Lithium oxide (Li 2 O)--4.5 weight % Sodium oxide (Na 2 O)--13.5 weight % Potassium oxide (K 2 O)--4.5 weight % Titanium dioxide (TiO 2 )--7.1 weight %.
Claim 16
Dependent Claim
84 words
A prosthesis working piece according to claim 6, wherein said bio-glass ceramic composition comprises Silicon dioxide (SiO 2 ) from about 42 to 48.5 weight % Calcium metaphosphate (Ca(PO 3 ) 2 ) from about 12.5 to 18 weight % Sodium oxide (Na 2 O) from about 3.5 to 6 weight % Potassium oxide (K 2 O) from about 0 to 1.5 weight % Magnesium oxide (MgO) from about 0 to 1.5 weight % Calcium oxide (CaO) from about 28 to 35 weight %.
Claim 17
Dependent Claim
42 words
A prosthesis working piece according to claim 15, wherein said bio-glass ceramic composition comprises Silicon dioxide (SiO 2 )--46 weight % Sodium oxide (Na 2 O)--5 weight % Calcium oxide (CaO)--33 weight % Calcium metaphosphate (Ca(PO 3 ) 2 )--16 weight %.
Claim 18
Dependent Claim
64 words
A prosthesis working piece according to claim 1, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 )--61.0 weight % Boron trioxide (B 2 O 3 )--4.7 weight % Sodium oxide (Na 2 O)--16.7 weight % Titanium dioxide (TiO 2 )--10.8 weight % Lithium oxide (Li 2 O)--0.9 weight % Magnesium oxide (MgO)--4.7 weight % Cryolite (Na 3 AlF 6 )--1.2 weight %.
Claim 19
Dependent Claim
64 words
A prosthesis working piece according to claim 1, wherein said inorganic enamel composition comprises Silicon dioxide (SiO 2 )--49.0 weight % Boron trioxide (B 2 O 3 )--15.0 weight % Sodium oxide (Na 2 O)--14.5 weight % Titanium dioxide (TiO 2 )--10.0 weight % Lithium oxide (Li 2 O)--2.5 weight % Magnesium oxide (MgO)--4.0 weight % Cryolite (Na 3 AlF 6 )--5.0 weight %.
Claim 20
Dependent Claim
21 words
A prosthesis working piece according to claim 1, wherein said bio-active material comprises a bio-glass composition or a bio-glass ceramic composition.
Claim 21
Dependent Claim
19 words
A prosthesis working piece according to claim 1, wherein said structural core element comprises a metal or metal alloy.
Claim 22
Dependent Claim
77 words
A prosthesis working piece according to claim 1, wherein said bio-active material particles are partly embedded in said carrier layer by the steps of converting said carrier layer into a viscous state at a temperature which is not high enough to adversely affect the bio-active properties of said bio-active material or change the structural properties of the core element, incorporating said bio-active material particles into the viscous carrier layer and thereafter causing the carrier layer to solidify.
Claim 23
Dependent Claim
16 words
A prosthesis working piece according to claim 1, comprising a plurality of inorganic enamel carrier layers.
Claim 24
Dependent Claim
25 words
A prosthesis working piece according to claim 22, wherein at least two of said inorganic enamel carrier layers have a different coefficient of thermal expansion.
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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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |