EP3672649A1 - Keramisches teil mit mindestens einem keramischen schaum für medizintechnische anwendungen - Google Patents
Keramisches teil mit mindestens einem keramischen schaum für medizintechnische anwendungenInfo
- Publication number
- EP3672649A1 EP3672649A1 EP18755465.4A EP18755465A EP3672649A1 EP 3672649 A1 EP3672649 A1 EP 3672649A1 EP 18755465 A EP18755465 A EP 18755465A EP 3672649 A1 EP3672649 A1 EP 3672649A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ceramic
- medical applications
- ceramic part
- applications according
- porous region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 86
- 239000006260 foam Substances 0.000 title claims abstract description 20
- 239000007943 implant Substances 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 19
- 229910010293 ceramic material Inorganic materials 0.000 claims description 17
- 239000011148 porous material Substances 0.000 claims description 16
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 13
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 13
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 7
- 239000000316 bone substitute Substances 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 229910052575 non-oxide ceramic Inorganic materials 0.000 claims description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 11
- 239000000126 substance Substances 0.000 description 8
- 210000000988 bone and bone Anatomy 0.000 description 7
- 210000001519 tissue Anatomy 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010883 osseointegration Methods 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 4
- 239000001506 calcium phosphate Substances 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000004053 dental implant Substances 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 229910052746 lanthanum Inorganic materials 0.000 description 3
- -1 lanthanum aluminate Chemical class 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical class [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 229910052587 fluorapatite Inorganic materials 0.000 description 2
- 229940077441 fluorapatite Drugs 0.000 description 2
- 210000004394 hip joint Anatomy 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 229910052622 kaolinite Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 235000019731 tricalcium phosphate Nutrition 0.000 description 2
- 229940078499 tricalcium phosphate Drugs 0.000 description 2
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910020068 MgAl Inorganic materials 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910003668 SrAl Inorganic materials 0.000 description 1
- 239000005084 Strontium aluminate Substances 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 1
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000004166 bioassay Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 210000000845 cartilage Anatomy 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002316 cosmetic surgery Methods 0.000 description 1
- 229910001649 dickite Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 238000002283 elective surgery Methods 0.000 description 1
- 210000003722 extracellular fluid Anatomy 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 210000001145 finger joint Anatomy 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 210000004195 gingiva Anatomy 0.000 description 1
- 229910052621 halloysite Inorganic materials 0.000 description 1
- 210000004124 hock Anatomy 0.000 description 1
- 238000010952 in-situ formation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 210000000629 knee joint Anatomy 0.000 description 1
- 229910052907 leucite Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000036244 malformation Effects 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000004820 osteoconduction Effects 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 210000004197 pelvis Anatomy 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 229910052903 pyrophyllite Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 210000000323 shoulder joint Anatomy 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- FNWBQFMGIFLWII-UHFFFAOYSA-N strontium aluminate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Sr+2].[Sr+2] FNWBQFMGIFLWII-UHFFFAOYSA-N 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- 210000001226 toe joint Anatomy 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/10—Ceramics or glasses
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- A—HUMAN NECESSITIES
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
- A61L27/42—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix
- A61L27/427—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix of other specific inorganic materials not covered by A61L27/422 or A61L27/425
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/56—Porous materials, e.g. foams or sponges
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
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- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
- C04B35/587—Fine ceramics
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Definitions
- the invention relates to the use of ceramic parts, preferably in the field of medical technology, wherein the parts are at least partially formed from a ceramic foam.
- ceramic components which have at least one porous part or consist entirely of a porous ceramic material are known in the field of medical technology, for example in the field of implant technology.
- methods and methods for making the porous structures are known. These include, for example, slip-based processes in which ceramic porous structures are produced on components or entire porous components by means of a ceramic slurry having organic, structure-determining porosity agents or chemical ingredients.
- the ceramic slips are to be understood as suspensions comprising a liquid medium, a ceramic starting powder and optionally additional additives.
- the object of the present invention was therefore to provide usable in medical ceramic parts that at least partially or even completely consist of a ceramic foam and do not have the disadvantages of the known components.
- ceramic parts for medical applications preferably implants
- fastening means such as screws or nails
- Ceramic parts in the sense of the present invention are medical products made of ceramics, which consist partly or completely of a ceramic foam.
- the ceramic foam is made of solid ceramic material which has a significant fraction of pores (usually 20 to 95% by volume), which may be isolated (closed porosity) and / or in a pore network (open porosity).
- closed porosity usually 20 to 95% by volume
- open porosity usually 20 to 95% by volume
- parts comprising various ceramic structures, in which the ceramic foam shows different forms:
- Full foam part a part which consists of 100% of the volume of ceramic foam.
- it can be used as a filler to serve as a lead structure for osteoconduction and osseointegration.
- 3D- Structured.it Part A part that consists of both a porous area and a significant dense ceramic area.
- the porous area usually protrudes more than 1 mm into the part. Examples include implants for partial resurfacing in which the area of the part facing the bone is extensively porous and a narrow area of the part facing the articulation surface, which area comprises a dense ceramic area.
- 2D-Textured.it Part A part whose surface is partially or completely defined by a thin, near-surface, porous area in its topology. The porous area protrudes about ⁇ 1 mm deep into the part, so that the volume fraction of the dense ceramic is greater than in the 3D-structured part. Examples of these are ceramic monobloc pans, in which the pelvis facing the back is open-pored, textured and the side facing the hip joint ball of dense, polished material preferably ceramic is formed.
- parts whose cross sections are formed from different structures are possible. These structures may include both porous ceramic foam as well as dense ceramics, wherein the arrangement of the structures is determined by the application of the parts. As a result, any combination of the above structures are conceivable.
- the ceramic parts which at least partially consist of a ceramic foam, ceramic implants, ie both human medical and veterinary implants for pets, pets and pets, more preferably implants for human medical applications.
- implants which usually have wall thicknesses in the range of 0.3 to 30 mm
- implants for human medical applications are implants for small and large joints, spinal implants, implants in the field of partial resurfacing, bone replacement materials as filling materials, dental implants and components or parts of implant systems.
- Implants for small joints may in particular comprise implants for the finger joints, toe joints, elbow joints, hocks and the wrist and other joints.
- implants for large joints includes, for example, implants for the hip joint, the knee joint and the shoulder joint.
- the spinal implants may include cages, TDR (Total Disk Replacement) and vertebral body inserts.
- partial resurfacing in the context of the present invention includes partial dentures that only compensate for local joint / cartilage defects. Usually these consist of a tribologically optimized, congruent side, which faces the joint space, as well as a side facing the bone, which ensures the anchoring. Partial resurfacing is mainly used for large joints, since less (bone) tissue has to be removed due to the small overall surgical area and, as a result, later revision surgery is significantly facilitated.
- bone substitute material preferably relates to filling materials, for example Umostosteotomien, trauma injuries, voluminous tissue loss by tumors, revisions, ie repeated operation with insufficient result of the first intervention or limited shelf life of the original implant, which in most cases to a extended surgery, ie a larger area of tissue that has to be resected, comes for plastic surgery for the medically indicated reconstruction of tissue through malformations as well as purely aesthetic elective surgery and for defects of the calvaria or craniofacial and facial skull bones Structures, whether on a surface or as a three-dimensional structure, have special properties in terms of their macro and microstructure in the range of a few mm as far as the sub- ⁇ range, since the behavior of cells interacting therewith in a biological system can thereby be controlled, for example osseointegration (ingrowth of an implant).
- osseointegration ingrowth of an implant
- the use of structures according to the invention as dental implants relates to the use in particular of pin-shaped implants which are inserted into the jawbone and osseointegrate there in order to function as an artificial tooth root.
- the porous area of the dental implant is preferably arranged in the lower area, the area that touches the jawbone, while the upper part (head) is made of dense ceramic. Due to the dense ceramic in the upper area a sufficient mechanical resilience of the interface to the abutment is ensured. In addition, this dense area allows a positive connection with the gingiva and thus also counteracts the infiltration of pathogens. In order to achieve the highest possible mechanical stability of the implant, the dense region can extend centrally from the implant head into the porous region.
- Ceramic parts of structures according to the invention can also be used as components in implant systems.
- the porous area when it is used facing the bone, favor osseointegration.
- the connection to other non-ceramic materials or materials is also possible or improved.
- the macrostructure of the porous region of a part is dominated by the pores, wherein the pore size of the porous portion of the part between several 10 ⁇ and 1 mm, preferably between 50 ⁇ and 1 mm, more preferably between 100 and 700 ⁇ .
- the pore sizes are determined by means of microscope images with a resolution of at least 0.2 ⁇ / ⁇ and preferably with a resolution in the range of 0.2 to 1 ⁇ / ⁇ by software-based marking and then calculating the equivalent diameter.
- the porous region furthermore preferably has a porosity of 20 to 95%, preferably 55 to 85%.
- the dense area has a residual porosity of max. 5% up.
- the porosity is preferably present as predominantly open porosity, which forms an interconnecting pore network, wherein at least 60%, particularly preferably at least 85%, of the porosity represent open porosities.
- the ingrowth can be up to depths of more than 0.5 mm up to 5 mm.
- mechanical integration of implant and surrounding tissue or bone through undercut pores can be achieved by deeper ingrowth.
- the open porosity enables nutrient supply through diffusion processes in the extracellular fluid.
- the modulus of elasticity of the ceramic foam is approximately ⁇ 15%, preferably ⁇ 10% of the modulus of elasticity of the ceramic solid material. Strain to micromechanical strains and thereby hydrodynamic circulation processes come.
- the use of a foaming process is also advantageous in that it can be implemented in comparison with known types of ceramic Schlickeraufleung with proper process control without major additional effort. For example, there are no additional shaping structures necessary, such as organic balls of cellulose, fiber structures or polyurethane foam structures that are soaked in specially prepared ceramic slurry and then burned out in the further manufacturing process (porosity, templating or - conversion, etc.).
- the ceramic material for the ceramic part of the present invention may be selected from known and commercially available (ceramic) materials, provided that the ceramic material is biocompatible and has higher strengths, lower corrosion behavior, and lower body ion release rates than calcium phosphates, e.g. B. hydroxyapatite (HA) and tricalcium phosphate (TCP) or metals and alloys.
- the optionally present areas of the ceramic part, d. H. the porous area of the ceramic foam and the dense area may be made of the same or a different ceramic material.
- Preferred ceramic materials including the starting powders for producing the part according to the invention, are oxide-ceramic materials, for example based on aluminum oxide or zirconium oxide, or non-oxide-ceramic materials, based for example on silicon nitride or silicon carbide.
- oxide-ceramic materials for example based on aluminum oxide or zirconium oxide
- non-oxide-ceramic materials based for example on silicon nitride or silicon carbide.
- the basic requirement of the material is its biocompatibility, ie it must not cause negative reactions in the body.
- the biological assessment z. B. according to DIN EN ISO 10993 (as of 2010-04) to meet.
- the ceramic material is a material of the mixed oxide system Al 2 O 3 -Zr0 2 , in particular ZTA ceramics (Zirconia Toughned Alumina), or ceramic composites in which zirconium oxide represents the volume-nominating phase, these systems depending on the dominant phase nor chemical stabilizers or dispersoids in the form of other metal oxides or mixed oxides are added.
- ZTA ceramics Zirconia Toughned Alumina
- ceramic composites in which zirconium oxide represents the volume-nominating phase these systems depending on the dominant phase nor chemical stabilizers or dispersoids in the form of other metal oxides or mixed oxides are added.
- ZTA ceramics in which alumina is the volume dominating phase are: A ceramic material consisting of 60 to 98 vol.% Of an alumina / chromium oxide mixed crystal as a matrix material containing 0.8 to 32.9 vol.% Of a or a plurality of further mixed crystals selected from mixed crystals according to one of the general formulas La 0 , 9Aln, 76-xCr x Oi 9, Me 1 Al 11 -x Cr x Oi 7 , Me 2 Al 12 -xCr x Oi 9 , Me 2 eI 12- x Cr x Oi 9 or Me 3 Al 11 -x Cr x Oi 8 where Me1 is an alkali metal, Me 2 is an alkaline earth metal, Me 2 is cadmium, lead or mercury and Me 3 is a rare earth oxide metal, and where x corresponds to a value of 0.0007 to 0.045, and 2 to 40 vol.% Embedded in the matrix material zirconium dioxide, as stabilizing oxides more
- This material preferably contains a further dispersoid phase, the volume fraction of the dispersoids forming the dispersoid phase being up to 10% by volume, preferably 2 to 8% by volume, particularly preferably 3 to 6% by volume.
- all substances which are chemically stable and which do not dissolve in the aluminum oxide or in the zirconium oxide by sintering at high temperatures during the production of the composite material and, due to their crystal structure, allow inelastic microdeformations on a microscopic level can be used as dispersoids.
- both the addition of dispersoids and the in situ formation of the dispersoids in the production of the composite material according to the invention are possible.
- Examples of dispersoids suitable according to the invention are strontium aluminate (SrAl 12 0i 9 ) or lanthanum aluminate (LaAlnO-is).
- Examples of ceramic composites in which zirconium oxide is the volume dominating phase is a ceramic material, zirconia ceramic matrix and at least one secondary phase dispersed therein, the zirconia matrix occupying at least 51% by volume of the composite and the Secondary phase represents a proportion of 1 to 49 vol .-% of the composite material, wherein the zirconium oxide, based on the total zirconium oxide content of 90 to 99%, preferably 95 to 99% in the tetragonal phase is present, and wherein as chemical stabilizers Y203, Ce02, Gd203, Sm203 and / or Er203 are present, wherein the total content of chemical stabilizers ⁇ 12 mol% based on the Zirkonoxidgehalt and wherein the secondary phase is selected from one or more of the following compounds: strontiumhexaaluminataluminate (SrAI 12 0i 9 ), Lanthanum aluminate (LaAlnOie), hydroxyapatite (Cai 0 (PO 4
- the grain size in the sintered microstructure in a similar range of 0.01 to 50 ⁇ or particularly preferably in the range 0.1 to 5 ⁇ , in the structure determined by means of line-cut method according to DIN EN ISO 13383-1 (2016-1 1).
- the ceramic part according to the invention for medical applications consists at least of a porous region and optionally a dense region, wherein the porous region, which consists of a ceramic foam, preferably has a density in the range of 0.5 to 2.5 g / cm 3 , more preferably 0.8 to 1.8 g / cm 3 .
- the strength of the porous portion of the member is preferably in the range of 5 to 300 MPa, more preferably in the range of 20 to 150 MPa.
- the thermal conductivity of the ceramic part is preferably ⁇ 10 W / Km and thus lies in a similar range as the thermal conductivity of the natural tissue.
- This material behavior of a part according to the invention allows machining methods such as drilling, nailing, screwing, rasping, cut-off grinding. This makes it possible to fix a part according to the invention by means of fastening means such as screws, nails, pins, etc. These fasteners can be introduced into the area formed by the porous ceramic foam without the part being damaged, which interferes with the use.
- the part according to the invention in particular the porous area of the ceramic foam, not only promotes the ingrowth of the natural tissue, but also contributes to fixation before and during the operation, d. H. a connection with the body or other implant material is possible.
- the ceramic part of the present invention or its porous region is preferably screwable, d. H. screws can be inserted, nailable, d. H. the hammering or pressing of nails is made possible and drivable, d. H. it can be introduced holes, whereby more positive and / or non-positive connections (eg., By pins), and sewing are possible.
- the mentioned fixing means may have a diameter of up to 5 mm, preferably up to 3 mm.
- the ceramic component or its porous area can also be adhesively bonded and can be welded (Bone Welding®). Both in bonding and in Bone Welding®, the porosity of the part according to the invention or of its porous region is advantageous, since the implant can be infiltrated with the process material (> 0.5 mm deep) and then mechanically beyond a chemical bond For example, it is toothed connected to this. As a result, connections to other materials such as non-ceramic materials such as plastics and metals are possible.
- the different joining methods of the different materials can be performed within applications, for example, during use during or after an operation, in advance when manufacturing a component or part of a system.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Dermatology (AREA)
- Epidemiology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Medicinal Chemistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017214886 | 2017-08-25 | ||
| PCT/EP2018/072058 WO2019038145A1 (de) | 2017-08-25 | 2018-08-14 | Keramisches teil mit mindestens einem keramischen schaum für medizintechnische anwendungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3672649A1 true EP3672649A1 (de) | 2020-07-01 |
Family
ID=63209423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18755465.4A Withdrawn EP3672649A1 (de) | 2017-08-25 | 2018-08-14 | Keramisches teil mit mindestens einem keramischen schaum für medizintechnische anwendungen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20210046211A1 (de) |
| EP (1) | EP3672649A1 (de) |
| JP (1) | JP2020531090A (de) |
| CN (1) | CN110944683A (de) |
| WO (1) | WO2019038145A1 (de) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10492921B2 (en) | 2015-04-29 | 2019-12-03 | Institute for Musculoskeletal Science and Education, Ltd. | Implant with arched bone contacting elements |
| US10709570B2 (en) | 2015-04-29 | 2020-07-14 | Institute for Musculoskeletal Science and Education, Ltd. | Implant with a diagonal insertion axis |
| US10449051B2 (en) | 2015-04-29 | 2019-10-22 | Institute for Musculoskeletal Science and Education, Ltd. | Implant with curved bone contacting elements |
| EP3288501B1 (de) | 2015-04-29 | 2020-11-25 | Institute For Musculoskeletal Science And Education, Ltd. | Spulenimplantate |
| US10478312B2 (en) | 2016-10-25 | 2019-11-19 | Institute for Musculoskeletal Science and Education, Ltd. | Implant with protected fusion zones |
| US11033394B2 (en) | 2016-10-25 | 2021-06-15 | Institute for Musculoskeletal Science and Education, Ltd. | Implant with multi-layer bone interfacing lattice |
| US10512549B2 (en) | 2017-03-13 | 2019-12-24 | Institute for Musculoskeletal Science and Education, Ltd. | Implant with structural members arranged around a ring |
| US10357377B2 (en) | 2017-03-13 | 2019-07-23 | Institute for Musculoskeletal Science and Education, Ltd. | Implant with bone contacting elements having helical and undulating planar geometries |
| US10744001B2 (en) | 2017-11-21 | 2020-08-18 | Institute for Musculoskeletal Science and Education, Ltd. | Implant with improved bone contact |
| US10940015B2 (en) | 2017-11-21 | 2021-03-09 | Institute for Musculoskeletal Science and Education, Ltd. | Implant with improved flow characteristics |
| CN112552041B (zh) * | 2019-09-10 | 2021-11-12 | 比亚迪股份有限公司 | 制备氧化锆陶瓷的组合物、氧化锆陶瓷及其制备方法和应用 |
| JP2022162546A (ja) * | 2021-04-12 | 2022-10-24 | 東ソー株式会社 | 焼結体 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5214095A (en) * | 1975-07-23 | 1977-02-02 | Sumitomo Chemical Co | Implant in bone |
| JPS61201683A (ja) * | 1985-03-06 | 1986-09-06 | オリンパス光学工業株式会社 | 人工骨用複合材料 |
| DE10036252B4 (de) * | 2000-07-26 | 2005-11-24 | Bausch & Lomb Gmbh | Orbita-Implantat |
| AU2004203889B2 (en) * | 2003-08-22 | 2006-02-23 | Panasonic Healthcare Holdings Co., Ltd. | ZrO2-Al2O3 composite ceramic material |
| US8268383B2 (en) * | 2008-09-22 | 2012-09-18 | Depuy Products, Inc. | Medical implant and production thereof |
| CA2910208A1 (en) * | 2013-04-30 | 2014-11-06 | Ceramtec Gmbh | Ceramic bone substitute material and method for the production thereof |
| FR3037803B1 (fr) * | 2015-06-23 | 2017-07-07 | I Ceram | Implant de substitution du sternum |
-
2018
- 2018-08-14 US US16/641,001 patent/US20210046211A1/en not_active Abandoned
- 2018-08-14 EP EP18755465.4A patent/EP3672649A1/de not_active Withdrawn
- 2018-08-14 JP JP2020508516A patent/JP2020531090A/ja not_active Withdrawn
- 2018-08-14 WO PCT/EP2018/072058 patent/WO2019038145A1/de not_active Ceased
- 2018-08-14 CN CN201880055209.4A patent/CN110944683A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20210046211A1 (en) | 2021-02-18 |
| JP2020531090A (ja) | 2020-11-05 |
| WO2019038145A1 (de) | 2019-02-28 |
| CN110944683A (zh) | 2020-03-31 |
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