Process for producing rigid reticulated articles
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61F-002/28
A61L-027/32
B05D-003/02
출원번호
UP-0245369
(2005-10-06)
등록번호
US-7740897
(2010-07-12)
발명자
/ 주소
Marx, Jeffrey G.
Heckendorf, Bradley R.
Johnson, James R.
Venarsky, John Jeffrey
출원인 / 주소
Wright Medical Technology, Inc.
대리인 / 주소
Womble Carlyle Sandridge & Rice, PLLC
인용정보
피인용 횟수 :
2인용 특허 :
99
초록▼
A method for forming a ceramic article useful as a bone substitute and having an outer surface defining a shape having a bulk volume and having open, interconnecting openings extending throughout the volume and opening through the surface, includes, providing an organic open-pore structure, coating
A method for forming a ceramic article useful as a bone substitute and having an outer surface defining a shape having a bulk volume and having open, interconnecting openings extending throughout the volume and opening through the surface, includes, providing an organic open-pore structure, coating surface of pores of the structure with a ceramic slip, pyrolyzing the organic structure to leave a ceramic structure having struts defining a plurality of interconnecting interstices, and providing within the interstices a porous osteoconductive composition exposed to the interconnecting openings. In a preferred embodiment, the ceramic slip includes a strong, supportive ceramic material and a separate osteoconductive material.
대표청구항▼
What is claimed is: 1. A method of forming a ceramic article useful as a bone substitute and having an outer surface defining a shape having a bulk volume and having open, interconnecting openings extending throughout said volume and opening through said surface, the method comprising providing an
What is claimed is: 1. A method of forming a ceramic article useful as a bone substitute and having an outer surface defining a shape having a bulk volume and having open, interconnecting openings extending throughout said volume and opening through said surface, the method comprising providing an organic open-pore structure, coating surfaces of pores of the structure with a ceramic slip comprising zirconia, a binder, a solvent, fibers and/or whiskers, and hydroxyapatite, wherein the hydroxyapatite is present in an amount of up to about 50 volume percent based on the total volume of zirconia and hydroxyapatite, pyrolyzing the organic structure to leave a ceramic structure having struts defining a plurality of interconnecting interstices, and sintering the ceramic structure, said osteoconductive material being exposed to said interconnecting openings. 2. A method of claim 1, including the step of shaping said organic open-pore structure to a predetermined configuration before coating the pores thereof with said ceramic slip. 3. A method of claim 1, including the step of shaping said organic open-pore structure to a predetermined configuration after coating the pores thereof with said ceramic slip. 4. A method of claim 1 including the step of inserting a calcium phosphate bone cement into said openings. 5. A method of claim 1, wherein the hydroxyapatite is present in an amount of about 10 to about 25 volume percent based on the total volume of the zirconia and the hydroxyapatite. 6. A method of claim 1, further comprising the step of sintering the ceramic structure to a second, denser structural element. 7. A method of claim 1, wherein the fibers and/or whiskers comprise a material selected from the group consisting of glass, metal, and ceramic. 8. A method of claim 7, wherein the ceramic is selected from the group consisting of silicon nitride, silicon carbide, zirconia, alumina, and carbon. 9. A method of claim 1, wherein the length of the fibers and/or whiskers is from about 0.1 to about 100 microns. 10. A method of claim 1, further comprising contacting the struts with a porous osteoconductive coating either before or after said sintering step. 11. A method of claim 10, wherein the porous osteoconductive composition comprises an osteoconductive material selected from the group consisting of collagen, calcium phosphates, bone morphogenetic proteins, demineralized bone matrix, transforming growth factors, and osteoblast cells. 12. A method of claim 10, wherein the porous osteoconductive coating comprises hydroxyapatite. 13. A method of claim 1, wherein the ceramic structure comprises interstices having a size range of about 50 μm to about 1000 μm and a void volume of at least about 30%. 14. A method of claim 1, wherein the zirconia is yttria-stabilized zirconia. 15. A method of producing a rigid reticulated article, comprising: (a) providing a first dispersion of a metal or ceramic powder, a binder comprising a polyacrylate emulsion that polymerizes upon drying, and a solvent; (b) providing a reticulated substrate which has open, interconnected porosity; (c) contacting the reticulated substrate with the first dispersion to coat the substrate with the dispersion; (d) drying the coated reticulated substrate; (e) optionally contacting the reticulated substrate with one or more additional dispersions to form one or more additional coatings wherein the one or more additional coatings are the same or different from each other and the first coating; (f) drying the additional coating between the steps of contacting; (g) heating the coated reticulated substrate at a time and temperature sufficient to pyrolyze any organic components; (h) sintering to form a ceramic or metal or composite reticulated article; and further comprising the step of adding fibers and/or whiskers to at least one of the first dispersion and the one or more additional dispersions. 16. A method of claim 15, wherein the fibers and/or whiskers comprise a material selected from the group consisting of glass, metal, and ceramic. 17. A method of claim 16, wherein the ceramic is selected from the group consisting of silicon nitride, silicon carbide, zirconia, alumina, and carbon. 18. A method of claim 15, wherein the fibers and/or whiskers are added to more than one of the first dispersion and the one or more additional dispersions, and wherein the fibers and/or whiskers may comprise the same or different material. 19. A method of claim 15, wherein the length of the fibers and/or whiskers is from about 0.1 to about 100 microns. 20. A method of claim 15, wherein the volume fraction of binder is at least about 25 vol. % based on the entire volume of the solid components of the dispersion following drying.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (99)
Brekke John H. (Duluth MN), Apparatus for biodegradable, osteogenic, bone graft substitute device.
Riess Guido (Garmisch-Partenkirchen DEX) Geiger Albert (Garmisch-Partenkirchen DEX), Bone implant member for prostheses and bone connecting elements and process for the production thereof.
Takagi Shigehide (Tokyo JPX) Ito Kuniomi (Tochigi-ken JPX) Hidaka Tsuneo (Tokyo JPX), Ceramic device providing an environment for the promotion and formation of new bone.
Hermansson Leif (Uppsala SEX) Forberg Sevald (Enskede SEX) Jiangou Li (Stockholm SEX), Composite ceramic material and method to manufacture the material.
Dorman Linneaus C. (Midland MI) Meyers Paul A. (Dublin CA), Composites of unsintered calcium phosphates and synthetic biodegradable polymers useful as hard tissue prosthetics.
Lemons J. E. (c/o University of Alabama in Birmingham ; School of Dentistry ; Box 49 Birmingham AL 35294), Inorganic and organic composition for treatment of bone lesions.
Trml Pertti (Reikonkatu 7 C 7 SF-33730 Tampere FIX) Vainionp Seppo (Orapihlajatie 21-27 B 12 SF-00320 Helsinki FIX) Rokkanen Pentti (Marjaniemenranta 29 SF-00930 Helsinki FIX) Helevirta Pertti (Ojava, Layered surgical biocomposite material.
Barlow Joel W. (7139 Valburn Dr. Austin TX 78731) Lee Goonhee (3357 Lake Austin Blvd. #C Austin TX 78703) Crawford Richard H. (912 Lipan Trail Austin TX 78733) Beaman Joseph J. (700 Texas Ave. Austin, Method for fabricating artificial bone implant green parts.
Barrow David A. (Ajax CAX) Petroff T. Edward (Scarborough CAX) Sayer Michael (Kingston CAX), Method for producing thick ceramic films by a sol gel coating process.
Lin Ruey-Mo,TWX ; Wu Nan-Chung,TWX ; Liu Kuang-Hsing,TWX, Process for producing a bioceramic composite material containing natural bone material on an alumina substrate.
Okuyama Masahiko (Aichi JPX) Okada Kohji (Aichi JPX) Yamagiwa Katsuya (Aichi JPX), Process for producing biocompatible implant material by firing a mixture of a granulated powder and a combustible substa.
Saita Kenji (Toyonaka JPX) Miyazaki Susumu (Ibaraki JPX), Process for production of ceramic shaped product having granule layer on the surface and ceramic implant material.
Kijima Naoto (Yokohama JPX) Oguri Yasuo (Tokyo JPX), Producing a ceramic implant by coating a powder mixture of zirconia and either tricalcium phosphate or hydroxyapatite on.
Broemer Heinz (Hermannstein DEX) Adam Werner (Hermannstein DEX) Hedrich Friedhelm (Edingen DEX), Prosthesis parts provided with a coating of a bio-active material.
Broemer Heinz (Hermannstein DEX) Adam Werner (Hermannstein DEX) Hedrich Friedhelm (Edingen DEX), Prosthesis parts provided with a coating of a bio-active material, process of making same, and method of using them for.
Harney Marilyn J. (Painesville OH) Vauss ; Jr. Elvin M. (Cleveland OH) Sane Ajit Y. (Willoughby OH), Titanium and titanium hydride reticulates and method for making.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.