WO2015106999A1 - Surgical implant with volute spring - Google Patents

Surgical implant with volute spring Download PDF

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Publication number
WO2015106999A1
WO2015106999A1 PCT/EP2015/050188 EP2015050188W WO2015106999A1 WO 2015106999 A1 WO2015106999 A1 WO 2015106999A1 EP 2015050188 W EP2015050188 W EP 2015050188W WO 2015106999 A1 WO2015106999 A1 WO 2015106999A1
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WO
WIPO (PCT)
Prior art keywords
implant
surgical implant
evolutfeder
spring
surgical
Prior art date
Application number
PCT/EP2015/050188
Other languages
German (de)
French (fr)
Inventor
Armin Studer
Original Assignee
Ngmedical Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ngmedical Gmbh filed Critical Ngmedical Gmbh
Publication of WO2015106999A1 publication Critical patent/WO2015106999A1/en

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Classifications

    • 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
    • A61F2/442—Intervertebral or spinal discs, e.g. resilient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
    • A61B17/7026—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a part that is flexible due to its form
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • 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
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • 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
    • 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
    • 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
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • 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
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • A61F2002/30566—Helical springs

Definitions

  • the invention relates to a surgical implant, wherein at least one element of the surgical implant for receiving forces and / or for facilitating a change in length comprises at least one evolute spring, according to claim 1.
  • a generic surgical implant with an evolute spring is previously known from FR 2734 148 AI, but also from DE 102004018621 AI.
  • the implant is designed in several parts, i.
  • the implant consists of at least two implant parts, one to another
  • the evolute spring according to the invention connects the at least two implant parts in such a stabilizing and supporting manner that forces acting between the two implant parts and acting in the x, y or z-axis direction of a three-dimensional coordinate system are absorbed in a circumference determined by the spring force constant. This means that the Evolutfeder with their properties certain changes in position and length of the implant parts or the
  • Relative movement of the implant parts allows each other without the implant itself loses its stabilizing, surgically intended function.
  • the invention furthermore, in at least one axial direction given a greater degree of freedom of movement than in the other axis directions.
  • one of the implant parts which is in communication with the further implant part, is itself realized as an evolute spring.
  • one end of an evolute spring may be formed as a bone plate-like section, wherein the further spring end is in communication with a correspondingly dimensioned, rigid bone plate.
  • a surgical implant if it comprises a plurality of elements, at least one Evolutfeder, said Evolutfeder at least one element or a sub-element of the surgical
  • At least one element of the surgical implant is designed as an evolute spring or at least one element of the surgical implant has an evolute spring.
  • a surgical implant for receiving forces and / or for facilitating a change in length may comprise at least one evolute spring. This is the case, for example, when a surgical implant comprises only one element or only consists of one element.
  • a surgical implant for receiving forces and / or for facilitating a change in length may comprise at least one evolutive spring.
  • the absorbed forces are tensile forces and / or pressure forces and / or torsional forces and / or shear forces and / or
  • the position or length change that is to be made possible are changes in length with regard to the surgical implant itself.
  • the surgical implant can be transferred from an initial state or a starting position in the implanted state due to the associated tensile, compressive, bending, shear, or torsional forces in a necessary position with length change.
  • Evolutfeder such springs are referred to, which are wound from an upright standing flat material. Such Evolutfedern are also referred to as coil springs or pot feathers. Also the term bailliesche worm spring is known. The most common application of so-called evolute springs is in secateurs.
  • the at least one Evolutfeder more frequent, in particular at least 2-way formed.
  • the use or training of 3-speed, 4-speed, 5-speed Evolutfedern etc. is conceivable.
  • the at least one Evolutfeder is preferably made of metal, in particular of titanium.
  • the Evolutfeder can be made of all such materials, which allows both the recording of tensile, compressive, bending, shear, and torsional forces and further allows a change in length with respect to the surgical implant.
  • the at least one Evolutfeder can be incorporated for example in a cup-shaped element of the surgical implant.
  • a cup-shaped element of a surgical implant comprises at least one Evolutfeder or has at least one Evolutfeder.
  • the at least one evolute spring is incorporated in a rod-shaped element of the surgical implant.
  • a rod-shaped element of a surgical Implant at least one Evolutfeder or has at least one
  • At least one Evolutfeder preferably a plurality of Evolutfedern is disposed between two plate-like elements of the surgical implant or are.
  • the plate-like elements may have convex and / or concave curved portions.
  • a tubular element of a surgical implant comprises at least one
  • Evolutfeder or has at least one Evolutfeder.
  • the surgical implant may be, for example, a
  • At least one evolute spring for example, in knee prostheses or knee endoprostheses or hip replacement prostheses or at
  • the Evolutfeder can be incorporated in these cases, for example, in a cup-shaped joint element and / or in a core element of a joint replacement implant.
  • a cup-shaped joint element for example, in a cup-shaped joint element and / or in a core element of a joint replacement implant.
  • a cup-shaped core element of a joint replacement implant for example, in a cup-shaped joint element and / or in a core element of a joint replacement implant.
  • Joint element and / or a core element of the joint replacement implants and / or the prosthesis and / or the partial denture at least one
  • a bone screw may be a
  • At least one evolutive spring can be inserted in a screw shaft and / or in a head element and / or in an element which is located in the interior of the body
  • Head element is to be incorporated.
  • a screw shaft and / or a head element and / or an element, which is located in the interior of the head element, comprises at least one evolutive spring.
  • the at least one evolute spring can also be incorporated and / or arranged in implants which are implanted in the area of the spinal column.
  • Such implants may be disc prostheses or disc endoprostheses or pedicle screws or vertebral body replacement implants.
  • an intervertebral disc prosthesis or an intervertebral disc prosthesis or a pedicle screw or a vertebral body replacement implant comprises at least one Evolutfeder or has at least one Evolutfeder.

Abstract

The invention relates to a surgical implant in which at least one element of the implant comprises at least one single-pitched or multi-pitched volute spring in order to receive forces and/or in order to allow a change in position or length. According to the invention, the implant is designed in multiple parts, and the volute spring connects at least two implant parts in a stabilizing manner such that forces occurring between the two implant parts and acting in the x, y, and/or z axial direction of a three-dimensional coordinate system are absorbed to an extent determined by the spring force constant. Furthermore, a greater degree of freedom of movement is provided in at least one axial direction than in the remaining axial directions.

Description

Chirurgisches Implantat mit Evolutfeder Beschreibung  Surgical implant with evolutive spring Description
Die Erfindung betrifft ein chirurgisches Implantat, wobei mindestens ein Element des chirurgischen Implantats zur Aufnahme von Kräften und/oder zur Ermöglichung einer Längenänderung mindestens eine Evolutfeder umfasst, gemäß Patentanspruch 1. The invention relates to a surgical implant, wherein at least one element of the surgical implant for receiving forces and / or for facilitating a change in length comprises at least one evolute spring, according to claim 1.
Der Nachteil hinsichtlich bislang bekannter chirurgischer Implantate ist darin zu sehen, dass diese Implantate keine große Längenänderung hinsichtlich des Implantates selber ermöglichen. Des Weiteren können die chirurgischen Implantate oftmals nicht gleichzeitig Druck-, Zug-, Biege-, Scher- und The disadvantage of hitherto known surgical implants is the fact that these implants do not allow a large change in length with respect to the implant itself. Furthermore, the surgical implants often can not simultaneously pressure, tensile, bending, shear and
Torsionskräfte aufnehmen und zusätzlich eine Längenänderung ermöglichen. Take up torsional forces and also allow a change in length.
Ein gattungsbildendes chirurgisches Implantat mit einer Evolutfeder ist aus der FR 2734 148 AI, aber auch aus der DE 102004018621 AI vorbekannt. A generic surgical implant with an evolute spring is previously known from FR 2734 148 AI, but also from DE 102004018621 AI.
Aus dem Vorgenannten ist es daher Aufgabe der vorliegenden Erfindung ein chirurgisches Implantat anzugeben, welches sowohl die Aufnahme von From the foregoing, it is therefore an object of the present invention to provide a surgical implant, which both the inclusion of
Kräften als auch eine definierte Längenänderung ermöglicht. Forces as well as a defined change in length allows.
Die Lösung der Aufgabe erfolgt durch ein chirurgisches Implantat gemäß Patentanspruch 1. Die Unteransprüche stellen mindestens zweckmäßige Ausgestaltungen und Weiterbildungen dar. The object is achieved by a surgical implant according to claim 1. The dependent claims represent at least expedient refinements and developments.
Erfindungsgemäß ist das Implantat mehrteilig ausgebildet, d.h. das Implantat besteht mindestens aus zwei Implantatteilen, die zueinander einer According to the invention, the implant is designed in several parts, i. The implant consists of at least two implant parts, one to another
Lageveränderung unterliegen. Die erfindungsgemäße Evolutfeder verbindet die mindestens zwei Implantatteile derartig stabilisierend und tragend, dass zwischen den zwei Implantatteilen auftretende, in x-, y- oder z-Achsen- richtung eines dreidimensionalen Koordinatensystems wirkende Kräfte in einem von der Federkraftkonstante bestimmten Umfang aufgenommen werden. Dies bedeutet, dass die Evolutfeder mit ihren Eigenschaften bestimmte Lage- und Längenänderungen der Implantatteile bzw. der Change in location subject. The evolute spring according to the invention connects the at least two implant parts in such a stabilizing and supporting manner that forces acting between the two implant parts and acting in the x, y or z-axis direction of a three-dimensional coordinate system are absorbed in a circumference determined by the spring force constant. This means that the Evolutfeder with their properties certain changes in position and length of the implant parts or the
Relativbewegung der Implantatteile zueinander ermöglicht, ohne dass das Implantat selbst seine stabilisierende, chirurgisch vorgesehene Funktion verliert. Erfindungsgemäß ist weiterhin in mindestens einer Achsenrichtung ein größerer Bewegungsfreiheitsgrad als in den übrigen Achsenrichtungen gegeben. Eine solche Lösung ermöglicht es, z.B. beim Einsatz des Implantats zum Fixieren von Fragmenten einer Knochenfraktur bei einer definierten eindeutigen Lagezuordnung der Frakturbruchstücke in einer vorgegebenen Achsenrichtung eine dynamische Beweglichkeit zu schaffen, welche den Heilungsprozess fördert. Relative movement of the implant parts allows each other without the implant itself loses its stabilizing, surgically intended function. According to the invention, furthermore, in at least one axial direction given a greater degree of freedom of movement than in the other axis directions. Such a solution makes it possible, for example when using the implant for fixing fragments of a bone fracture with a defined unique positional assignment of fracture fragments in a predetermined axial direction to create a dynamic mobility, which promotes the healing process.
Bei einer bevorzugten Ausführungsform besteht die Möglichkeit, dass eines der Implantatteile, welches mit dem weiteren Implantatteil in Verbindung steht, selbst als Evolutfeder realisiert wird. Mithin kann in diesem Fall z.B. ein Ende einer Evolutfeder als knochenplattenähnlicher Abschnitt ausgebildet sein, wobei das weitere Federende mit einer entsprechend dimensionierten, starren Knochenplatte in Verbindung steht. Dabei werden das eine Ende der Evolutfeder mit einem ersten Knochenbruchstück und die Knochenplatte mit dem weiteren Knochenbruchstück durch übliche Knochenschrauben In a preferred embodiment, there is the possibility that one of the implant parts, which is in communication with the further implant part, is itself realized as an evolute spring. Thus, in this case, e.g. one end of an evolute spring may be formed as a bone plate-like section, wherein the further spring end is in communication with a correspondingly dimensioned, rigid bone plate. Here are the one end of the Evolutfeder with a first bone fragment and the bone plate with the other bone fragment by conventional bone screws
verbindbar. connectable.
Es umfasst mindestens ein Element des chirurgischen Implantats zur It comprises at least one element of the surgical implant for
Aufnahme von Kräften und/oder zur Ermöglichung einer Längenänderung eine Evolutfeder. Absorption of forces and / or to allow a change in length an evolute spring.
In anderen Worten weist ein chirurgisches Implantat, sofern dieses mehrere Elemente umfasst, mindestens eine Evolutfeder auf, wobei diese Evolutfeder mindestens einem Element bzw. einem Teilelement des chirurgischen In other words, a surgical implant, if it comprises a plurality of elements, at least one Evolutfeder, said Evolutfeder at least one element or a sub-element of the surgical
Implantats zuzuordnen ist. Demnach ist es auch möglich, dass mindestens ein Element des chirurgischen Implantats als Evolutfeder ausgebildet ist oder mindestens ein Element des chirurgischen Implantats eine Evolutfeder aufweist. Assign implant is. Accordingly, it is also possible that at least one element of the surgical implant is designed as an evolute spring or at least one element of the surgical implant has an evolute spring.
Gemäß einem Aspekt der Erfindung kann ein chirurgisches Implantat zur Aufnahme von Kräften und/oder zur Ermöglichung einer Längenänderung mindestens eine Evolutfeder umfassen. Dies ist beispielsweise dann der Fall, wenn ein chirurgisches Implantat lediglich ein Element umfasst, bzw. lediglich aus einem Element besteht. According to one aspect of the invention, a surgical implant for receiving forces and / or for facilitating a change in length may comprise at least one evolute spring. This is the case, for example, when a surgical implant comprises only one element or only consists of one element.
In anderen Worten kann ein chirurgisches Implantat zur Aufnahme von Kräften und/oder zur Ermöglichung einer Längenänderung mindestens eine Evolutfeder aufweisen. Bei den aufgenommenen Kräften handelt es sich um Zugkräfte und/oder Druckkräfte und/oder Torsionskräfte und/oder Scherkräfte und/oder In other words, a surgical implant for receiving forces and / or for facilitating a change in length may comprise at least one evolutive spring. The absorbed forces are tensile forces and / or pressure forces and / or torsional forces and / or shear forces and / or
Biegekräfte. Die genannten Kräfte können einzeln oder in beliebiger Bending forces. The forces mentioned can be individually or in any
Kombination von der Evolutfeder aufgenommen werden. Combination to be absorbed by the Evolutfeder.
Bei der zu ermöglichenden Lage- oder Längenänderung handelt es sich um Längenänderungen hinsichtlich des chirurgischen Implantates selbst. The position or length change that is to be made possible are changes in length with regard to the surgical implant itself.
Demnach soll es ermöglicht werden, dass das chirurgische Implantat von einem Ausgangszustand bzw. einer Ausgangsposition im implantierten Zustand aufgrund der damit verbundenen Zug-, Druck-, Biege-, Scher-, bzw. Torsionskräften in eine notwendige Position mit Längenänderung überführt werden kann. Accordingly, it should be possible that the surgical implant can be transferred from an initial state or a starting position in the implanted state due to the associated tensile, compressive, bending, shear, or torsional forces in a necessary position with length change.
Als Evolutfeder werden derartige Federn bezeichnet, welche aus einem hochkant stehenden Flachmaterial gewickelt sind. Derartige Evolutfedern werden auch als Wickelfedern bzw. Topffedern bezeichnet. Auch der Begriff bailliesche Schneckenfeder ist bekannt. Häufigste Anwendung sogenannter Evolutfedern erfolgt in Gartenscheren. As Evolutfeder such springs are referred to, which are wound from an upright standing flat material. Such Evolutfedern are also referred to as coil springs or pot feathers. Also the term bailliesche worm spring is known. The most common application of so-called evolute springs is in secateurs.
In einer Ausführungsform der Erfindung ist die mindestens eine Evolutfeder mehrgängig, insbesondere mindestens 2-gängig, ausgebildet. Auch die Verwendung bzw. Ausbildung von 3-gängigen, 4-gängigen, 5-gängigen Evolutfedern usw. ist denkbar. In one embodiment of the invention, the at least one Evolutfeder more frequent, in particular at least 2-way formed. The use or training of 3-speed, 4-speed, 5-speed Evolutfedern etc. is conceivable.
Die mindestens eine Evolutfeder ist vorzugsweise aus Metall, insbesondere aus Titan, gefertigt. Prinzipiell kann die Evolutfeder aus allen derartigen Materialien gefertigt sein, welche sowohl die Aufnahme von Zug-, Druck-, Biege-, Scher-, und Torsionskräften ermöglicht und des Weiteren eine Längenänderung hinsichtlich des chirurgischen Implantates ermöglicht. The at least one Evolutfeder is preferably made of metal, in particular of titanium. In principle, the Evolutfeder can be made of all such materials, which allows both the recording of tensile, compressive, bending, shear, and torsional forces and further allows a change in length with respect to the surgical implant.
Die mindestens eine Evolutfeder kann beispielsweise in ein schalenförmiges Element des chirurgischen Implantats eingearbeitet sein. In anderen Worten umfasst ein schalenförmiges Element eines chirurgischen Implantats mindestens eine Evolutfeder bzw. weist mindestens eine Evolutfeder auf. The at least one Evolutfeder can be incorporated for example in a cup-shaped element of the surgical implant. In other words, a cup-shaped element of a surgical implant comprises at least one Evolutfeder or has at least one Evolutfeder.
Des Weiteren ist es möglich, dass die mindestens eine Evolutfeder in ein stabförmiges Element des chirurgischen Implantats eingearbeitet ist. In anderen Worten umfasst ein stabförmiges Element eines chirurgischen Implantats mindestens eine Evolutfeder bzw. weist mindestens eine Furthermore, it is possible that the at least one evolute spring is incorporated in a rod-shaped element of the surgical implant. In other words, a rod-shaped element of a surgical Implant at least one Evolutfeder or has at least one
Evolutfeder auf. Evolutfeder on.
In einer weiteren Ausführungsform der Erfindung ist es möglich, dass mindestens eine Evolutfeder, vorzugsweise mehrere Evolutfedern, zwischen zwei plattenartigen Elementen des chirurgischen Implantats angeordnet ist bzw. sind. Die plattenartigen Elemente können konvex und/oder konkav gekrümmte Abschnitte aufweisen. In a further embodiment of the invention, it is possible that at least one Evolutfeder, preferably a plurality of Evolutfedern is disposed between two plate-like elements of the surgical implant or are. The plate-like elements may have convex and / or concave curved portions.
Ebenfalls ist es möglich, dass die mindestens eine Evolutfeder in einem rohrförmigen Element angeordnet ist. In anderen Worten umfasst ein rohrförmiges Element eines chirurgischen Implantats mindestens eine It is also possible that the at least one Evolutfeder is arranged in a tubular element. In other words, a tubular element of a surgical implant comprises at least one
Evolutfeder bzw. weist mindestens eine Evolutfeder auf. Evolutfeder or has at least one Evolutfeder.
Bei dem chirurgischen Implantat kann es sich beispielsweise um einen The surgical implant may be, for example, a
Gelenkersatz oder eine Knochenschraube oder einen Verbindungsstab oder einen Knochenersatz oder um ein Implantat zur Implantierung im Bereich der Wirbelsäule oder eine Bandscheibenprothese handeln. Joint replacement or a bone screw or a connecting rod or a bone substitute or act around an implant for implantation in the spine or an intervertebral disc prosthesis.
Bei Gelenkersatz-Implantaten und/oder Prothesen und/oder Teilprothesen kann mindestens eine Evolutfeder beispielsweise bei Knieprothesen oder Knieendoprothesen oder bei Hüftgelenkprothesen oder bei In joint replacement implants and / or prostheses and / or partial dentures, at least one evolute spring, for example, in knee prostheses or knee endoprostheses or hip replacement prostheses or at
Schultergelenkprothesen oder bei Fingergelenkprothesen vorgesehen sein. Shoulder joint prostheses or be provided in finger joint prostheses.
Die Evolutfeder kann in diesen Fällen beispielsweise in ein schalenförmiges Gelenkelement und/oder in ein Kernelement eines Gelenkersatz-Implantates eingearbeitet sein. In anderen Worten umfasst ein schalenförmiges The Evolutfeder can be incorporated in these cases, for example, in a cup-shaped joint element and / or in a core element of a joint replacement implant. In other words, includes a cup-shaped
Gelenkelement und/oder ein Kernelement der Gelenkersatz-Implantate und/oder der Prothese und/oder der Teilprothese mindestens eine Joint element and / or a core element of the joint replacement implants and / or the prosthesis and / or the partial denture at least one
Evolutfeder. Evolutfeder.
Bei einer Knochenschraube kann es sich beispielsweise um eine For example, a bone screw may be a
Pedikelschraube oder eine Fixierungsschraube handeln. Mindestens eine Evolutfeder kann beispielsweise in einen Schraubenschaft und/oder in ein Kopfelement und/oder in ein Element, welches sich im Inneren des Pedicle screw or a fixing screw act. For example, at least one evolutive spring can be inserted in a screw shaft and / or in a head element and / or in an element which is located in the interior of the body
Kopfelements befindet, eingearbeitet sein. In anderen Worten umfasst ein Schraubenschaft und/oder ein Kopfelement und/oder ein Element, welches sich im Inneren des Kopfelements befindet, mindestens eine Evolutfeder. Die mindestens eine Evolutfeder kann auch in Implantate, welche im Bereich der Wirbelsäule implantiert werden, eingearbeitet und/oder angeordnet sein. Bei derartigen Implantaten kann es sich um Bandscheibenprothesen oder Bandscheibenendoprothesen oder um Pedikelschrauben oder um Wirbelkörperersatzimplantate handeln. In anderen Worten umfasst beispielsweise eine Bandscheibenprothese oder eine Bandscheibenendoprothese oder eine Pedikelschraube oder ein Wirbelkörperersatzimplantat mindestens eine Evolutfeder bzw. weist mindestens eine Evolutfeder auf. Head element is to be incorporated. In other words, a screw shaft and / or a head element and / or an element, which is located in the interior of the head element, comprises at least one evolutive spring. The at least one evolute spring can also be incorporated and / or arranged in implants which are implanted in the area of the spinal column. Such implants may be disc prostheses or disc endoprostheses or pedicle screws or vertebral body replacement implants. In other words, for example, an intervertebral disc prosthesis or an intervertebral disc prosthesis or a pedicle screw or a vertebral body replacement implant comprises at least one Evolutfeder or has at least one Evolutfeder.

Claims

Ansprüche claims
1. Chirurgisches Implantat, wobei mindestens ein Element des Implantats zur Aufnahme von Kräften und/oder zur Ermöglichung einer Lage- oder Längenänderung mindestens eine ein- oder mehrgängige Evolutfeder umfasst, 1. A surgical implant, wherein at least one element of the implant for receiving forces and / or for facilitating a change in position or length comprises at least one single or multiple involute spring,
dadurch gekennzeichnet, dass  characterized in that
das Implantat mehrteilig ausgebildet ist, wobei die Evolutfeder  the implant is designed in several parts, wherein the Evolutfeder
mindestens zwei Implantatteile derartig stabilisierend verbindet, dass zwischen den zwei Implantatteilen auftretende, in x-, y- und/oder z- Achsenrichtung eines dreidimensionalen Koordinatensystems wirkende Kräfte in einem von der Federkraftkonstante bestimmten Umfang aufgenommen werden, wobei weiterhin in mindestens einer  at least two implant parts such stabilizing connects that acting between the two implant parts, acting in the x-, y- and / or z-axis direction of a three-dimensional coordinate system forces are included in a certain of the spring constant constant circumference, wherein further in at least one
Achsenrichtung ein größerer Bewegungsfreiheitsgrad als in den übrigen Achsenrichtungen gegeben ist.  Axial direction is given a greater degree of freedom of movement than in the other axis directions.
2. Chirurgisches Implantat nach Anspruch 1, 2. A surgical implant according to claim 1,
dadurch gekennzeichnet, dass  characterized in that
die Evolutfeder in ein schalenförmiges Element des chirurgischen  the evolutive spring into a cup-shaped element of the surgical
Implantats eingearbeitet ist.  Implant is incorporated.
3. Chirurgisches Implantat nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass 3. A surgical implant according to one of the preceding claims, characterized in that
die Evolutfeder in ein stabförmiges Element des chirurgischen Implantats eingearbeitet ist.  the Evolutfeder is incorporated into a rod-shaped element of the surgical implant.
4. Chirurgisches Implantat nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass 4. Surgical implant according to one of the preceding claims, characterized in that
mindestens eine Evolutfeder, vorzugsweise mehrere Evolutfedern, zwischen zwei plattenartigen Elementen des chirurgischen Implantats angeordnet ist bzw. sind.  at least one Evolutfeder, preferably a plurality of Evolutfedern, is arranged between two plate-like elements of the surgical implant or are.
5. Chirurgisches Implantat nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass 5. Surgical implant according to one of the preceding claims, characterized in that
die mindestens eine Evolutfeder in einem rohrförmigen Element angeordnet oder ausgebildet ist. the at least one evolute spring is arranged or formed in a tubular element.
6. Chirurgisches Implantat nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass 6. A surgical implant according to one of the preceding claims, characterized in that
das chirurgische Implanat ein Gelenkersatz oder eine Knochenschraube oder ein Verbindungsstab oder ein Knochenersatz oder ein Implantat zur Implantierung im Bereich der Wirbelsäule ist.  the surgical implant is a joint replacement or a bone screw or a connecting rod or a bone substitute or an implant for implantation in the area of the spine.
PCT/EP2015/050188 2014-01-14 2015-01-08 Surgical implant with volute spring WO2015106999A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
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US4309777A (en) * 1980-11-13 1982-01-12 Patil Arun A Artificial intervertebral disc
FR2734148A1 (en) 1995-05-15 1996-11-22 Biomat Spinal intervertebral disc replacement prosthesis
DE102004018621A1 (en) 2004-04-16 2005-11-10 Biedermann Motech Gmbh Elastic element e.g. for stabilizing device for bones and method of fabrication of such an elastic element, has a cylindrical body with two ends and flexible section between ends and section is made from two coil springs
US20120059483A1 (en) * 2009-06-12 2012-03-08 Stout Medical Group, L.P. Orthopedic interface device and method

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EP0444382B1 (en) * 1990-03-01 1994-04-06 SULZER Medizinaltechnik AG Cementless metallic artificial hip cup
US6245112B1 (en) * 2000-02-29 2001-06-12 Hammill Manufacturing Co. Joint prosthesis variable flexibility
WO2004016217A2 (en) * 2002-08-15 2004-02-26 David Gerber Controlled artificial intervertebral disc implant

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US3990116A (en) * 1974-10-17 1976-11-09 Fixel Irving E Pretensioned prosthetic device for skeletal joints
US4309777A (en) * 1980-11-13 1982-01-12 Patil Arun A Artificial intervertebral disc
FR2734148A1 (en) 1995-05-15 1996-11-22 Biomat Spinal intervertebral disc replacement prosthesis
DE102004018621A1 (en) 2004-04-16 2005-11-10 Biedermann Motech Gmbh Elastic element e.g. for stabilizing device for bones and method of fabrication of such an elastic element, has a cylindrical body with two ends and flexible section between ends and section is made from two coil springs
US20120059483A1 (en) * 2009-06-12 2012-03-08 Stout Medical Group, L.P. Orthopedic interface device and method

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