BRPI0317820B1 - Implante intervertebral - Google Patents
Implante intervertebral Download PDFInfo
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- BRPI0317820B1 BRPI0317820B1 BRPI0317820-0A BR0317820A BRPI0317820B1 BR PI0317820 B1 BRPI0317820 B1 BR PI0317820B1 BR 0317820 A BR0317820 A BR 0317820A BR PI0317820 B1 BRPI0317820 B1 BR PI0317820B1
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- BR
- Brazil
- Prior art keywords
- intervertebral implant
- implant according
- holes
- degrees
- front plate
- Prior art date
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- 239000007943 implant Substances 0.000 title claims abstract description 94
- 210000000988 bone and bone Anatomy 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 241000238631 Hexapoda Species 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 8
- 239000007769 metal material Substances 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 239000002990 reinforced plastic Substances 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910002065 alloy metal Inorganic materials 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- 208000002607 Pseudarthrosis Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 210000000709 aorta Anatomy 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
-
- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
- A61F2/4465—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
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- A61F2/442—Intervertebral or spinal discs, e.g. resilient
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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- A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
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- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
- A61F2002/30843—Pyramidally-shaped
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- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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- A—HUMAN NECESSITIES
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Prostheses (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Description
Relatório Descritivo da Patente de Invenção para “IMPLANTE INTERVERTEBRAL”. A invenção se refere a um implante intervertebral de acordo com o termo genérico da reivindicação de 5 patente 1.
Um implante intervertebral é técnica anterior do documento GB-A-2 207 607, que é designado em uma forma de ferradura com um número de furos cilíndricos. Os furos são designados com lados internos lisos e proporcionam somente o paradas para as cabeças dos parafusos de osso a serem inseridas nestas. A desvantagem deste arranjo é que os parafusos de posicionamento inseridos nos furos podem ser ancorados no osso somente com seu eixo mecânico, sem qualquer conexão rígida ao implante intervertebral em forma de ferradura sendo criado. Logo 5 que qualquer enfraquecimento do ancoramento do eixo mecânico do parafuso ocorre, o implante intervertebral tornar-se-á móvel eem relação ao parafuso, e existe, então, uma tendência dos parafusos de osso migrarem, com os danos contínuos aos vasos sangüíneos. O afrouxamento do implante intervertebral pode o também conduzir a pseudo-artrose.
Um implante intervertebral é também técnica anterior a partir do documento US-A-2000/0010511 MICHELSON, um dispositivo que é provido na superfície frontal com dois furos com uma rosca interna, em cujo osso parafusos 5 com uma cabeça de parafuso podem ser inseridos. Desvantajoso neste implante é, por um lado, as circunstâncias que os parafusos de osso podem afrouxarem novamente e não são seguros contra aparafusamento ou queda uma vez inseridos. Existe também a desvantagem adicional que os parafusos de osso são totalmente fixados ao próprio corpo de implante, e o último, conseqüentemente, é submetido a esforço relativamente maior.
Os parafusos que emergem na borda anterior e antero-lateral dos corpos vertebrais apresentam um risco de dano aos vasos principais, tal como a aorta, veia cava e veias de suprimento, tais como as veias e artérias lombares. O dano aos vasos principais conduziría a morte através de hemorragia interna dentro de um curto período. Os parafusos podem ser mais facilmente afrouxados quando eles não estão fixados com ângulo estável. A invenção é pretendida para remediar esta situação. A invenção é baseada no problema de criar um implante intervertebral que possa estabelecer uma conexão permanentemente rígida aos dispositivos de fixação de osso, de modo que nenhum afrouxamente entre o implante intervertebral e o meio de fixação de osso ocorrerá se a estrutura de osso é enfraquecida. Em adição, uma ligação de tensão será provida para os elementos de fixação de osso por meio de uma placa frontal separadamente formada, de modo que o corpo de implante é submetido a menos esforço, isto é., forças de tensão combinadas. Uma placa de segurança adicionalmente também permite seguramento simultâneo de todos os elementos de fixação de osso. A invenção resolve a tarefa por meio de um implante intervertebral que tem as características da reivindicação 1.
As vantagens providas pela invenção geralmente resultam da conexão permanentemente rígida, isto é., fixa, entre o implante intervertebral e os elementos de fixação de osso usados para seguramento destes.
Na superfície frontal do corpo tri-dimensional, uma placa frontal é fixada em uma posição vertical ao nível central horizontal do implante intervertebral através do qual os furos se deslocam e em que os elementos de fixação longitudinais podem ser ancorados. Isto tem a vantagem, comparado aos implantes de duas partes, de acordo com a técnica anterior, em que uma placa frontal é implantada em uma etapa de operação separada, que a implantação do implante intervertebral pode ser efetuada em uma etapa simples e, desse modo, mais facilmente e rapidamente. Uma outra vantagem resulta do acima em que a fixação do implante intervertebral pode ser efetuada mais próxima à parte frontal do corpo vertebral, isto é., em uma posição onde existe geralmente bom material de osso. Isto resulta em uma restrição anterior de movimento, sem, contudo, qualquer grande risco sendo, desse modo, incorrido para as estruturas circundantes do que é o caso quando um implante intervertebral, de acordo com o estado da técnica, é usado. A carga sob compressão é ainda suportada pelo implante intervertebral e não pela placa frontal ou pelos parafusos de fixação.
Uma placa de segurança pode ser segura paralela à placa frontal, preferivelmente por meio de uma conexão de parafuso, uma junta de baioneta, ou captador de estalido. A placa de segurança é provida vantajosamente com um furo central, que é, por sua vez, provido vantajosamente com uma rosca interna. A placa frontal é provida vantajosamente com um furo central para recebimento de um meio de seguramento.
Em uma concretização especial, pelo menos um dos furos na placa frontal é designado de tal modo que um elemento de fixação longitudinal posicionado neste pode ser conectado rigidamente à placa frontal.
Esta conexão rígida pode ser alcançada, por exemplo, por ter pelo menos um dos provido com uma rosca interna. Um parafuso de osso correspondente com uma cabeça de parafuso pode, em seguida, ser aparafusado junto com o implante para formar uma conexão rígida.
Uma alternativa ao acima consiste em pelo menos um dos furos ser afilado em um cone em direção ao lado inferior, de modo que um parafuso de osso com cabeça cônica correspondente pode ser ancorado neste com conexão rígida. O furo cônico preferivelmente consiste de um ângulo cônico que é menor do que o ângulo de fricção resultante. A conicidade do furo cônico vantajosamente mede 1:3,75 a 1:20,00, preferivelmente na faixa 1:5 a 1:15.
Os elementos de fixação de osso podem ter ou uma cabeça lisa, com a resultante que não será uma conexão rígida ao implante, ou uma cabeça de parafuso, cabeça cônica, ou cabeça de expansão, de modo que será uma conexão rígida ao implante. Em ambos os casos, contudo, os elementos de fixação de osso são seguros pela placa de segurança contra ser girada, j prensada ou caída em algum momento mais tarde.
Em uma concretização especial, a placa frontal no corpo tri-dimensional é designada como um inserto, e disposta com movimento deslizante e preferivelmente vertical ao nível central horizontal, de modo que ela pode deslizar em uma direção ) vertical em relação ao corpo tri-dimensional. Isto conduz a assim denominada “blindagem de tensão” (proteção ou neutralização de forças de tensão mecânicas), que permite que as placas graduas se adaptem gradualmente ao implante intervertebral no curso do processo de cura. > Em uma concretização adicional, a placa frontal é manufaturada de um material que é diferente daquele usado para o corpo tri-dimensional, preferivelmente de um material metálico. Materiais metálicos adequados são especificamente titânio ou ligas de titânio. O arranjo de ligação de tensão completo (placa ) frontal e parafusos) pode ser manufaturado de aço de implante ou materiais metálicos de liga alta, tais como CoCrMo de CoCrMoC. A vantagem do titânio está em sua compatibilidade com o tecido e suas características de fundição de osso favoráveis. A vantagem dos materiais metálicos de liga alta está em suas altas ; propriedades de resistência mecânica, que permitem construções de filigrana. O lado de topo e/ου a superfície inferior do implante intervertebral são vantajosamente não planar, mas preferivelmente de forma convexa. Isto permite melhor ajuste para assentar as placas terminais dos corpos vertebrais vizinhos. ; Em uma outra concretização, as superfícies laterais do implante intervertebral são todas geralmente de forma convexa.
Os furos vantajosamente não penetram a superfície lateral esquerda e direita do implante intervertebral. A superfície frontal também tem a vantagem de não ser penetrada ) pelos furos.
Em uma outra concretização preferida, pelo menos dois dos furos se deslocam paralelos. Isto facilita a inserção do implante intervertebral durante o processo de implantação. ; Em uma outra concretização preferida, pelo menos dois dos furos se deslocam em direção divergente quando vistos a partir do lado frontal. Desse modo, os parafusos de osso podem ser inseridos em uma área do corpo vertebral onde a qualidade do osso é melhor do que no centro, i Em uma concretização especial, os eixos geométricos dos furos em relação ao nível central horizontal formam um ângulo beta na faixa de 20 graus a 60 graus, preferivelmente 36 graus a 48 graus. Os eixos geométricos dos furos em relação ao nível central vertical formam vantajosamente um ângulo alfa na faixa de 10 graus a 45 graus, preferivelmente 27 graus a 33 graus. Isto assegura melhor acesso quando os parafusos estão sendo inseridos.
Em uma concretização adicional, o nível central horizontal não é penetrado pelos furos, i Em uma concretização especial, o lado de topo e lado inferior do corpo são providos com uma estruturação, preferivelmente na forma de dentes. O implante intervertebral pode ser designado como um corpo vazado, as superfícies de jaqueta do qual são ) preferivelmente providas com perfurações.
De acordo com as circunstâncias do caso sendo tratado, será possível conectar dois, três, quatro ou mais elementos de fixação longitudinais ao implante intervertebral para formar uma conexão rígida. Pelo menos um elemento de fixação deve vantajosamente penetrar o lado de topo, e pelo menos um elemento de fixação penetra o lado inferior do implante intervertebral.
Os elementos de fixação longitudinais usados são preferivelmente na forma de parafusos de osso com uma i cabeça e um eixo mecânico, onde a cabeça é preferivelmente provida com uma rosca externa, que corresponde à rosca interna do furo do implante intervertebral. Um segundo meio de conexão rígido possível pode preferivelmente fazer uso de um parafuso de osso em que a cabeça é afilada para um cone na direção do eixo mecânico, no qual a conicidade da cabeça corresponde à conicidade do furo do implante intervertebral.
Em uma outra concretização, pelo menos dois elementos de fixação longitudinais penetram o lado de topo, e pelo menos dois elementos de fixação longitudinais penetram o lado inferior. Isto proporciona o implante intervertebral com ancoramento ótimo nos corpos vertebrais vizinhos.
Os elementos de fixação longitudinais providos na forma de parafusos de osso têm preferivelmente uma rosca externa de auto-furação e auto-corte. Os elementos de fixação longitudinais podem também ser designados como pinos retos não-rosqueados planos que são providos com uma broca de perfuração , preferivelmente na forma de um furador.
Uma variação adicional consiste dos elementos de fixação longitudinais sendo formados como parafusos espirais, e, finalmente, os elementos de fixação longitudinais também podem ser designados como lâminas espirais de asa simples ou de asa múltipla. O implante intervertebral pode ser manufaturado de qualquer material que não tenha efeitos adversos no corpo. O implante é, contudo, mais vantajosamente manufaturado a partir de um plástico compatível com o corpo, preferivelmente um plástico não-reforçado. A vantagem, desse modo, obtida em comparação aos plásticos reforçados por fibra que são já conhecidos da implantologia é que nenhuma fibra de reforço é liberada, que representa uma vantagem clínica. Em tal corpo composto de plástico não-reforçado, parafusos de osso podem ser vantajosamente usados, a rosca externa do qual sendo provida com um ângulo de flanco de carga na faixa de 11 graus a 14 graus, preferivelmente 12 graus a 13 graus. A inclinação comparavelmente baixa do flanco de carga conduz a uma força de prendimento alta, que, por sua vez, conduz a uma redução na expansão radial e perigo de rasgamento do plástico. A rosca externa dos parafusos de osso é vantajosamente provida com um ângulo de inclinação na faixa de 6 a 10 graus, preferivelmente 7 a 9 graus. Este ângulo especial de inclinação gera um mecanismo de bloqueio automático na cabeça de parafuso e, desse modo, segura o parafuso de osso contra afrouxamento por si.
De modo a aperfeiçoar o ancoramento do parafuso de osso no corpo plástico, o furo pode ser na forma de uma luva de metal com rosca interna. O implante intervertebral pode também ser composto somente parcialmente de um plástico permeável a raios X e - na área dos furos - consistir de metal, por exemplo., de titânio ou liga de titânio. Isto assegura uma guia e ancoramento aperfeiçoado total dos parafusos de osso no implante intervertebral.
Em uma concretização adicional, os furos podem ser providos com uma parede interior lisa, na qual a cabeça de parafuso de um elemento de fixação longitudinal metálico pode ser cortada ou moldada. A invenção e concretizações da invenção são explanadas em maiores detalhes abaixo com base de uma ilustração parcialmente esquemática de uma concretização. A FIGURA 1 mostra um diagrama de explosão do implante intervertebral; A FIGURA 2 mostra um dispositivo de fixação de osso longitudinal na forma de um parafuso; A FIGURA 3 mostra uma vista frontal do implante intervertebral de acordo com a FIGURA 1; A FIGURA 4 mostra uma vista lateral do implante intervertebral de acordo com a FIGURA 1; A FIGURA 5 mostra uma vista em detalhe tridimensional do corpo do implante intervertebral mostrando os elementos de conexão para a placa frontal de acordo com a FIGURA 6; A FIGURA 6 mostra uma vista em detalhe tridimensional da placa frontal do implante intervertebral mostrando os elementos de conexão para o corpo de acordo com a FIGURA 5; e A FIGURA 7 mostra um implante intervertebral montado completo com a placa frontal e placa de segurança. O implante intervertebral ilustrado nas Figuras 1-7 compreende um corpo tri-dimensional 10 na forma de uma gaiola com um lado superior 1 e um lado inferior 2, adequados para aplicação às placas terminais de dois corpos vertebrais vizinhos, uma superfície lateral esquerda 3 e uma superfície lateral direita 4, uma superfície frontal 5 e uma superfície traseira 6, um nível central horizontal 7 assentando entre o lado superior 1 e o lado inferior 2, um nível central vertical 12 se deslocando a partir da superfície frontal 5 para a superfície traseira 6, quatro furos 9 que penetram o corpo 10, cujos furos são adequados para recebimento de elementos de fixação longitudinais 20. O corpo 10 é designado como um corpo oco, as superfícies de jaqueta do qual são providas com perfurações 19. O corpo tri-dimensional 10 é provido uma placa frontal em sua superfície frontal 5, através da qual os furos 9 se deslocam, e em que os elementos de fixação longitudinais 20 podem ser ancorados. O implante intervertebral é adicionalmente provido com uma placa de segurança 18 que pode ser segura à placa frontal 8 por meio de uma conexão de parafuso paralela à placa frontal 8, de tal modo que os furos 9 podem ser cobertos parcialmente pela placa de segurança 18. A placa de segurança 18 é provida para esta proposta com um furo central 17. A placa frontal 8 é correspondentemente provida com um furo central 15 com rosca interna 14 para recebimento de um meio de seguramento 16 na forma de um parafuso.
Os quatro furos 9 na placa frontal 8 são providos com uma rosca interna 11, de modo que os elementos de fixação longitudinais 20 recebidos nestes podem ser conectados na forma de parafusos com a placa frontal 8 para formar uma junta rígida. A placa frontal 8 consiste de titânio, e o corpo tri-dimensional 10 consiste de um plástico não-reforçado permeável a raios X. A placa frontal 8 é, conforme ilustrada nas figuras 5/6, formada como um inserto para o corpo 10, e disposta com movimento deslizante e vertical ao nível central horizontal 7. O corpo 10 é provido para esta proposta com uma ranhura cilíndrica semi-circular 27, que se desloca paralela ao nível central vertical 12 nos pontos de transição da superfície lateral esquerda 3 ou da superfície lateral direita 5 (Figura 5) para a superfície frontal 5. A placa frontal 8 é, conseqüentemente, provida nos lados direito e esquerdo (Figura 6) com um trilho cilíndrico semi-circular similarmente orientado e similarmente dimensionado 28. Desse modo, a placa frontal pode ser muito facilmente inserida e posicionada - durante a manufatura do implante intervertebral - com seus dois trilhos laterais 28 nas ranhuras relevantes 27 do corpo 10.
As superfícies laterais 1, 2, 3, 4, 5 e 6 são todas designadas com forma convexa.
Os furos 9 não penetram nem na superfície lateral esquerda 3 nem na superfície lateral direita 4; a superfície frontal 5 não é também completamente penetrada pelos furos 9.
Os quatro furos 9 todos se deslocam em direções divergentes a partir da respectiva da superfície frontal 5 (Figura 7).
Os eixos geométricos 24 dos furos 9 formam em relação ao nível central 7 um ângulo beta de 42 graus, e em relação ao nível central vertical 12 um ângulo de 30 graus.
Os furos 9 não penetram o nível central horizontal 7, somente os eixos geométricos 24 dos elementos de fixação longitudinais 20 inseridos nestes intersectam o nível central horizontal 7 do corpo 10.
Conforme ilustrado na Figura 7, o lado superior 1 e o lado inferior 2 do corpo 10 são providos com estruturação na forma de dentes 30.
Os elementos de fixação longitudinais 20 são formados como parafusos de osso. Conforme ilustrado na Figura 2, os elementos de fixação longitudinais 20 inseridos nos furos 9 são providos com uma cabeça 21, uma ponta 22, um eixo mecânico 23 e um eixo geométrico 24. A cabeça 21 é provida com uma rosca externa 25, correspondente à rosca interna 11 do furo 9, de modo que as cabeças 21 podem ser ancoradas nos furos 9 para formar uma conexão rígida. O eixo mecânico 24 é provido com uma rosca 26, que é auto perfurante e auto-cortante. O ângulo de flanco de carga da rosca 26 mede 12,5°, e o ângulo de inclinação 8o. O seguramento da placa de segurança 18 à placa frontal 8 assegura que as cabeças 21 dos elementos de fixação longitudinais 20 entrem em contato com a placa de segurança 18, que os segura contra serem empurrados ou torcidos subseqüentemente.
Conforme ilustrado na Figura 7, dois elementos de fixação longitudinais 20 penetram o lado superior 1, e dois elementos de fixação longitudinais 20 penetram no lado inferior 2 do corpo 10.
Uma descrição breve da operação é provida aqui por meio de explanação adicional da invenção: a) O implante intervertebral na forma de um corpo tri-dimensional 10 é inserido entre dois corpos vertebrais vizinhos por meio de instrumentos adequados; b) quatro elementos de fixação longitudinais 20 na forma de parafusos de osso são aparafusados através dos furos 9 da placa frontal 8 nos corpos vertebrais por meio de um dispositivo alvo adequado; c) a placa de segurança 18 é fixada à placa frontal por meio de meios de seguramento 16 na forma de um parafuso sobre as cabeças 21 dos elementos de fixação longitudinais 20, que resultam nas cabeças 21 dos elementos de fixação longitudinais 20 - e, desse modo, também os parafusos -sendo mantidos entre a placa frontal 8 e a placa de segurança 18, e sendo seguros contra alteração relativa em direção ao corpo 10 (por exemplo., por queda ou torcimento). O meio de seguramento 16 na forma de um parafuso é preferivelmente provido com uma rosca, que é caracterizada por suas fortes propriedades de travamento automático.
Claims (40)
1.- Implante intervertebral, compreendendo um corpo tri-dimensional (10) com À) um lado superior (1) e um lado inferior (2), adequados para contra-apoio das placas terminais de dois corpos vertebral s v i z i n h o s; B) uma superfície lateral esquerda (3) c uma superfície lateral direita (4); C) uma superfície frontal (5) e uma superfície traseira (6); D) um plano central horizontal (7) posicionado entre o lado superior (1) e o lado inferior (2); E) um plano central vertical (12) se deslocando a partir da superfície frontal (5) para a superfície traseira (6); F) uma pluralidade de furos (9) que penetram o corpo (10) que são adequados para recebimento de elementos de fixação longitudinais (20); no qual G) o corpo tri-dimensional (10) é provido em sua superfície frontal (5) com urna placa frontal (8), através da qual os furos (9) se estendem, e em que os elementos de fixação longitudinais (20) podem ser ancorados; caracterizado pelo fato dc que Η) o implante intervertebral é provido com uma placa de seguramento (18) que pode ser segura essencialmente paralela à placa frontal (8) no corpo (10), ou na placa frontal (8) de tal modo que os furos (9) podem ser cobertos pelo menos parcialmente pela placa de seguramento (18); pelo que 1) a placa frontal no corpo trí-dimensional é designada como um inserto e dcslizavelmente disposta.
2. - Implante intervertebral, de acordo com a reivindicação 1, caracterizado pelo falo de que a placa de seguramento (18) pode ser segura paralela à placa frontal (8), preferivelmente por meio de uma conexão de parafuso, urna junta de baioneta, ou captador de estalido.
3. - Implante intervertebral, de acordo com a reivindicação Ί ou 2, caracterizado pelo fato de que a placa de seguramento (18) é provida com um furo central (17).
4. -- Implante intervertebral, de acordo com a reivindicação 3, caracterizado pelo fato de que a placa frontal (8) é provida com um furo central (15) para recebimento do meio de seguramento (16), que é preferivelmente provido com uma rosca interna (14)
5. — Implante intervertebral, de acordo com qualquer urna das reivindicações 1 a 4, caracterizado pelo fato de que pelo menos um dos furos (9) na placa frontal (8) é designado de tal modo que um elemento de fixação longitudinal (20) recebido neste é rigidamente conectável à placa frontal (8).
6. - Implante intervertebral, de acordo com a reivindicação 5, caracterizado pelo falo de que pelo menos um dos furos (9) é provido com uma rosca interna (11).
7. -.- Implante intervertebral, de acordo com a reivindicação 5 ou 6, caracterizado pelo fato de que pelo menos um furo (9) se afila conicamente em direção ao lado inferior (2),
8, - Implante intervertebral, de acordo com a reivindicação 7, caracterizado pelo fato de que o furo cônico (9) tem uni ângulo cônico que é menor do que a ângulo de fricção resultante,
9, - Implante intervertebral, de acordo com a reivindicação 8, caracterizado pelo fato de que a conic idade do furo cônico (9) está na faixa 1:3,75 a 1:20,00, preferivelmente na faixa 1:5 a 1:15.
10, - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 9, caracterizado pelo fato de que a placa frontal (8) é formada como um inseito, e é preferivelmente disposta verticalmente ao plano central horizontal.
11, - Implante intervertebral, de acordo com a reivindicação 10, caracterizado pelo fato de que a placa frontal (8) no corpo tri-dimensional (10) é disposta verticalmente deslizaveImente ao plano central (7).
12, - Implante intervertebral de acordo com qualquer uma das reivindicações 1 a 11, caracterizado pelo fato de que a placa frontal (8) é manufaturada de um material que é diferente daquele usado para o corpo tri-dimensional (10), e que é preferivelmente um metal.
13. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 12, caracterizado pelo fato de que suas superfícies laterais (1, 2, 3, 4, 5, 6) são todas geralmente de forma convexa,
14. - Implante intervertebral, de acordo com qualquer tinia das reivindicações 1 a 13, caracterizado pelo fato de que o lado superior (1) e/ou o lado inferior (2) sâo não planares, mas preferivelmente de forma convexa,
15. - implante intervertebral, de acordo com qualquer unia das reivindicações 1 a 14, caracterizado pelo fato de que os furos (9) não penetram a superfície lateral esquerda (3) e a superfície lateral direita (4).
16. - Implante intervertebral, de acordo com qualquer uma das reivindicações l a 15, caracterizado pelo fato de que os furos (9) não penetram totalmente a superfície frontal (5).
17. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 16, caracterizado pelo fato de que pelo menos dois furos correm paralelos.
18. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 17, caracterizado pelo fato de que pelo menos dois dos furos (9) correm em uma direção divergente quando vistos a partir do lado frontal (l).
19. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 18, caracterizado pelo lato de que os eixos geométricos (24) dos furos (9) em relação ao plano central horizontal (7) formam um ângulo beta na faixa de 20 graus a 60 graus, preferivelmente 36 graus a 48 graus.
20. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 19, caracterizado pelo fato de que os eixos geométricos (24) dos furos (9) em relação ao plano central vertical (12) formam um ângulo alfa na faixa de 10 graus a 45 graus, preferivelmente 27 graus a 33 graus.
21. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 20, caracterizado pelo fato de que os furos (9) não penetram o plano central horizontal (7).
22. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 21, caracterizado pelo fato de que o corpo (10) consiste de plástico, preferivelmente um plástico não-re forçado.
23. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 22, caracterizado pelo fato de que o furo (9) é provido com uma luva de metal com rosca interna (Π)*
24. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 23, caracterizado pelo fato de que consiste parcialmente de um material permeável a raio X, preferivelmente um plástico, e na área dos furos (9) consiste de um metal, preferivelmente um metal baseado em titânio.
25. - Implante intervertebral, de acordo com qualquer uma das reivindicações 1 a 24, caracterizado pelo fato de que os furos (9) são providos com uma parede interior lisa, na qual a cabeça de parafuso de um elemento de fixação longitudinal metálico (20) pode ser cortada ou moldada.
26. --- Implante íntervertebral, de acordo com qualquer uma das reivindicações 1 a 25, caracterizado pelo falo de que o lado superior (1) e lado inferior (2) são providos com uma estruturação, preferivelmente na forma de dentes (30).
27.-Implante íntervertebral, de acordo com qualquer uma das reivindicações 1 a 26, caracterizado pelo fato de que é designado como um corpo oco, as superfícies de jaqueta do qual sâo preferivelmente providas com perfurações (19).
28. - Implante Íntervertebral, de acordo com qualquer uma das reivindicações 1 a 27, com pelo menos dois elementos de fixação longitudinais (20) que podem ser inseridos nos furos (9), caracterizado pelo fato de que os elementos de fixação longitudinais (20) inseridos nos furos (9) são providos com uma cabeça (21), uma ponta (22), um eixo mecânico (23) e um eixo geométrico (24), e que as cabeças (21) podem ser ancoradas oos furos (9).
29. - Implante íntervertebral, de acordo com a reivindicação 28, caracterizado pelo fato dc que as cabeças (21) entram em contato com a placa de seguramento (18) segura ao corpo (10) ou à placa frontal (8).
30. - Implante íntervertebral, de acordo com a reivindicação 28 ou 29, caracterizado pelo fato de que os eixos geométricos (24) dos elementos de fixação longitudinais (20) intersectam o plano central horizontal (7) do corpo (10).
31. - Implante intervertebral, de acordo com qualquer uma das reivindicações 28 a 30, caracterizado pelo fato de que pelo menos uni elemento de fixação longitudinal (20) penetra o lado superior (1), e pelo menos um elemento de fixação longitudinal (20) penetra o lado inferior (2).
32. - Implante intervertebral, de acordo com qualquer uma das reivindicações 28 a 31, caracterizado pelo fato de que a cabeça (21) é provida com urna rosca externa (25) correspondente à rosca interna (11) do furo (9).
33. - Implante intervertebral, de acordo com qualquer uma das reivindicações 28 a 32, caracterizado pelo fato de que a cabeça (21) é afilada para um cone na direção do eixo mecânico (23), no qual preferivelmente a conicidade da cabeça (21) corresponde à conicidade do furo (9).
34. - Implante intervertebral, de acordo coni qualquer uma das reivindicações 28 a 33, caracterizado pelo íâto de que pelo menos dois elementos dc fixação longitudinais (20) peneiram o lado superior (1), e pelo menos dois elementos de fixação longitudinais (20) penetram o lado inferior (2).
35. - Implante intervertebral, de acordo com qualquer uma das reivindicações 28 a 34, caracterizado pelo fato de que os elementos de fixação longitudinais (20) sâo formados como parafusos de osso. o eixo mecânico (23) do qual é provido com uma rosca (26) que é preferivelmente dc auto-furação e auto-corte.
36. - Implante intervertebral, de acordo com qualquer uma das reivindicações 28 a 35,, caracterizado pelo fato de que os elementos de fixação longitudinais (20) são formados como pinos retos não-rosqueados com uma broca de perfuração, preferivelmente na forma de um furador.
37. - Implante intervertebral, de acordo com qualquer uma das reivindicações 28 a 36, caracterizado pelo fato de que os elementos de fixação longitudinais (20) são formados como molas espirais.
38. - Implante intervertebral, de acordo com qualquer uma das reivindicações 28 a 37, caracterizado pelo fato de que os elementos de fixação longitudinais (20) são designados como lâminas espirais de asa simples ou de asa múltipla.
39. - Implante intervertebral, de acordo com qualquer uma das reivindicações 28 a 38, caracterizado pelo fato de que a rosca (26) do eixo mecânico (23) dos elementos de fixação longitudinais (20) é provida com um, ângulo de flanco de carga na faixa de 11 graus a 14 graus, preferivelmente 12 graus a 13 graus.
40. - Implante intervertebral, de acordo com qualquer uma das reivindicações 28 a 39, caracterizado pelo fato de que a rosca (26) do eixo mecânico (23) dos elementos de fixação longitudinais (20) é provida com um ângulo de inclinação na faixa de 6 graus a 10 graus, preferivelmente 7 graus a 9 graus.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CH2003/000089 WO2004069106A1 (de) | 2003-02-06 | 2003-02-06 | Zwischenwirbelimplantat |
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| Publication Number | Publication Date |
|---|---|
| BR0317820A BR0317820A (pt) | 2005-11-29 |
| BRPI0317820B1 true BRPI0317820B1 (pt) | 2015-06-30 |
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| BRPI0317820-0A BRPI0317820B1 (pt) | 2003-02-06 | 2003-02-06 | Implante intervertebral |
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| Country | Link |
|---|---|
| US (9) | US7846207B2 (pt) |
| EP (3) | EP2335656B1 (pt) |
| JP (1) | JP4977323B2 (pt) |
| AT (1) | ATE496593T1 (pt) |
| AU (1) | AU2003201614B2 (pt) |
| BR (1) | BRPI0317820B1 (pt) |
| CA (1) | CA2515247C (pt) |
| DE (1) | DE50313446D1 (pt) |
| ES (2) | ES2358586T3 (pt) |
| TW (1) | TWI315196B (pt) |
| WO (1) | WO2004069106A1 (pt) |
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2003
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- 2003-02-06 CA CA2515247A patent/CA2515247C/en not_active Expired - Fee Related
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- 2003-02-06 BR BRPI0317820-0A patent/BRPI0317820B1/pt not_active IP Right Cessation
- 2003-02-06 EP EP11009997A patent/EP2457541A1/de not_active Withdrawn
- 2003-02-06 WO PCT/CH2003/000089 patent/WO2004069106A1/de not_active Ceased
- 2003-02-06 JP JP2004567675A patent/JP4977323B2/ja not_active Expired - Lifetime
- 2003-02-06 AT AT03700311T patent/ATE496593T1/de active
- 2003-02-06 ES ES03700311T patent/ES2358586T3/es not_active Expired - Lifetime
- 2003-02-06 EP EP03700311A patent/EP1589909B1/de not_active Expired - Lifetime
- 2003-02-06 ES ES10014938T patent/ES2393099T3/es not_active Expired - Lifetime
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2004
- 2004-01-07 TW TW093100340A patent/TWI315196B/zh not_active IP Right Cessation
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2005
- 2005-08-08 US US11/199,599 patent/US7846207B2/en active Active
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2009
- 2009-04-29 US US12/432,088 patent/US7862616B2/en not_active Expired - Lifetime
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2010
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2011
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2015
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