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EP2403432A1 - Implant system having at least three support elements - Google Patents

Implant system having at least three support elements

Info

Publication number
EP2403432A1
EP2403432A1 EP10706649A EP10706649A EP2403432A1 EP 2403432 A1 EP2403432 A1 EP 2403432A1 EP 10706649 A EP10706649 A EP 10706649A EP 10706649 A EP10706649 A EP 10706649A EP 2403432 A1 EP2403432 A1 EP 2403432A1
Authority
EP
European Patent Office
Prior art keywords
implant system
support elements
joint part
socket part
spherical cap
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Withdrawn
Application number
EP10706649A
Other languages
German (de)
French (fr)
Inventor
Rudolf Wenzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Advanced Medical Technologies GmbH
Original Assignee
Advanced Medical Technologies 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 Advanced Medical Technologies GmbH filed Critical Advanced Medical Technologies GmbH
Publication of EP2403432A1 publication Critical patent/EP2403432A1/en
Withdrawn legal-status Critical Current

Links

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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • 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
    • A61F2/32—Joints for the hip
    • 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
    • A61F2/38—Joints for elbows or knees
    • 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
    • A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
    • 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
    • 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
    • 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
    • A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649—Ball-and-socket joints
    • A61F2002/30654—Details of the concave socket
    • A61F2002/30655—Non-spherical concave inner surface
    • 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
    • A61F2/30721—Accessories
    • A61F2002/30733—Inserts placed into an endoprosthetic cavity, e.g. for modifying a material property
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/30934—Special articulating surfaces
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • A61F2002/3623—Non-spherical heads
    • 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
    • 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
    • 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
    • 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
    • A61F2310/00179—Ceramics or ceramic-like structures
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material

Definitions

  • the invention relates to an implant system comprising a concave spherical cap-shaped socket part and a corresponding convex spherical cap-shaped joint part, wherein the hinge part rests in the socket part, according to the feature combination according to claim 1.
  • a component arrangement for a prosthesis in particular a cervical disc prosthesis, which consists of two basic components with attached sliding surfaces.
  • H are the basic components preferably made of polyether ether ketone and the sliding surfaces, for example, a Co-Cr alloy.
  • polyether-ether ketone has a modulus of elasticity similar to that of cortical bone, this material is particularly well suited for bonding surfaces of the prosthesis to be implanted and the bone exposed for good elasticity characteristics.
  • the material In order to achieve an increase of the bone to the PEEK material, however, the material must be subjected to a special treatment.
  • the Co-Cr alloy used in the sliding surfaces was used due to the good sliding properties with low abrasion of the material.
  • This cervical intervertebral disc prosthesis initially consists of a first and a second plate intended to be attached to adjacent cervical vertebrae.
  • a ball joint is provided, which is arranged between the two plates, which are mounted one above the other, wherein the ball joint consists of a spherical cap which cooperates with a spherical cap.
  • the plates can be advantageously carried out in titanium, the Contact surface with the vortex plates of the vertebrae, for example, with hydroxyapatite or titanium coated with surface effect, in order to improve the anchoring between the prosthesis and the adjacent bones.
  • the ball joint can in turn have a different combination of materials.
  • the spherical cap may be made of zirconia, while the corresponding spherical cap may be made of alumina.
  • Ceramic has a decisive disadvantage.
  • Prostheses which are formed, for example, as a ball joint or include such, can not be economically produced so that the spherical cap and the spherical cap play with each other without play with the whole surface (this can not be achieved even with metal implants).
  • Each ball joint is ultimately condemned to having either a point pad or a ring pad due to this game.
  • point support may have such a effect on a ceramic material that premature wear of the prosthesis occurs with the addition of tensile forces, resulting in breakage or displacement of the prosthesis.
  • an implant system which comprises a concave spherical cup-shaped socket part and a corresponding convex spherical cap-shaped hinge part, wherein the hinge part rests in the socket part, according to the feature combination according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.
  • At least three support elements are arranged on the surface of the joint part or on the surface of the socket part, which describe a ball triangle or a spherical polygon.
  • the described spherical cap-shaped socket and joint parts may on the one hand be components of a hip, knee, elbow, jump or wrist.
  • the spherical cap-shaped elements may represent parts of an implant system for intervertebral disc prostheses in the spinal region.
  • the advantage of the support elements on the surface of the socket or joint part is, on the one hand, that the entire load acting on the implant system can be distributed over at least three points, instead of one point as usual.
  • the hinge part can not have any translation within the customary play.
  • the three support elements are arranged on the surface of the joint or socket part on the convex or concave curvature that they a spherical triangle - also called a ball triangle - (in three support elements) or a spherical polygon - also called ball quadrangle - (more than three Limit support elements). This means that at no time all support elements lie on a circular arc.
  • the support elements are arranged around a central point of the spherical cap-shaped joint part or pan part spherically by 120 °. Whereby these angle specifications are not subject to any tolerance (for technical reasons the angle specifications do not have to be complied with), since the at least three existing support elements always rest on the surface of the socket part or of the joint part.
  • the support elements are designed according to the invention as punctual elevations of the surface of the spherical cap-shaped hinge part or the spherical cap-shaped pan part.
  • curved surface of the joint part or the cup part so individual elements are attached which form the punctual elevations of the support elements.
  • the elements may be dome-shaped or pyramid-shaped shapes which, due to their bearing on the surface of the joint part or of the socket part (depending on the part on which the support elements are mounted) represent support elements in the form of punctiform elevations.
  • the curved surfaces of the joint and socket part described in the embodiments represent only an exemplary form of the individual parts of the implant system.
  • the surfaces can also be designed plan or be provided with bevels.
  • the support elements are designed as a flat elevations relative to the surface of the spherical cap-shaped joint part or pan part.
  • elements in the form of, for example, small prisms or cylinders are mounted on the surface of the joint or pan part, which give a support element in the form of a flat elevation due to their support on the surface of the joint part or socket part.
  • the support elements are not only formed on a uniformly curved socket or joint part, but the respective surfaces of the socket or joint part in the support elements form a level or recess or one, based on the entire Gelenkteil- or pan part surface , have a smaller radius of curvature.
  • the entire implant system described consists of a ceramic material.
  • a metal or plastic implant titanium and PEEK as a plastic material may be mentioned.
  • material combinations are conceivable, according to which the joint part, for example, titanium and the joint part u. a. can be made of PEEK.
  • the support elements are again preferably made of ceramic.
  • such ceramic support elements are pressed into the titanium or PEEK plates of the joint or socket part.
  • the support elements have a lower roughness than the remaining surface of the socket or joint part, so that the support elements are smoother than the remaining surface of the respective component of the implant system.
  • the support elements are surface-treated.
  • the elements are polished because this is a relatively simple production step. This has the advantage that not the entire part on which the support elements are arranged must be polished, but only the support elements are processed, which come into contact with the corresponding implant system part.
  • the support elements are coated with a different material, so through the material coating
  • a smoother or more resistant surface can be designed.
  • the implant system described with the support elements according to the invention can preferably be used in connection with prostheses in the spinal area. So a use as an intervertebral disc prosthesis is conceivable.
  • the socket part described in such a case for example, the acetabulum and the joint part is the joint bone located on the thigh bone.
  • FIG. 1 shows a representation of an implant system according to the invention with supporting elements as punctiform elevations
  • FIG. 2 shows the support element resting on the socket part
  • FIG. 3 representation of an implant system according to the invention with introduced into the joint part recesses and support elements in the form of flat elevations and
  • Fig. 4 is a further illustration of an inventive
  • Implant system with introduced into the joint part Recesses and support elements in the form of flat elevations.
  • the implant system consists of a joint part 1 and the socket part 2. It can be seen that the joint part 2 is formed in the form of a convex spherical cap member and the socket part 2 in the form of a corresponding concave spherical cap shaped element.
  • FIG. 1 are located on the hinge part 1 three support elements 3, which are arranged around the central point of the curved hinge part spherical at 120 ° to each other. Furthermore, it is clear that the support elements 3 describe a ball triangle. For imaginary connecting lines, the supporting elements 3 enclose a spherical triangle. However, if more than 3 points of support are used, they will include a sphere polygon.
  • the advantage in the construction of an implant system with three support elements is that regardless of the distances of the support elements to each other and the maintenance of tolerances, the support elements always rest in the spherical cap.
  • FIG. 2 The interaction between the support elements 3 and the contacting socket part 2 is shown in FIG. 2 shown.
  • the section shows a arranged on the hinge part 1 support element 3, which contacts the concave-shaped surface of the socket part 2. Due to the design of the support element 3 as a spherical cap, a point contact takes place.
  • FIG. 3 shows a further exemplary embodiment of the implant system according to the invention.
  • the three support elements 3 are on the surface of the joint part 1, but not directly on a uniformly convex surface but on a recess 4.
  • This recess 4 has a concave curvature in the middle of each of the support elements 3 are mounted.
  • the concave curvatures serve to provide a draft-free construction which is particularly important in the manufacture of a ceramic implant system.
  • support elements 3 in the form of a flat survey. That is, the support elements 3 have a basic shape of a truncated cone, which is known to be flattened at its top. This flattening is completely in contact with the surface of the socket part 2 in a composite implant system.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)

Abstract

The invention relates to an implant system that comprises a concave spherical-segment-shaped socket part (2) and a corresponding convex spherical-segment-shaped joint part (1). The joint part (1) rests in the socket part (2), wherein according to the invention, at least three support elements (3) that describe a spherical triangle or a spherical polygon are arranged on the surface of the joint part (1) or on the surface of the socket part (2).

Description

IMPLANTATSYSTEM MIT WENIGSTENS DREI AUFLAGEELEMENTEN IMPLANT SYSTEM WITH AT LEAST THREE SUPPORT ELEMENTS
Beschreibungdescription
Die Erfindung betrifft ein Implantatsystem umfassend ein konkaves kugelkalottenförmiges Pfannenteil und ein korrespondierendes konvexes kugelkalottenförmiges Gelenkteil, wobei das Gelenkteil im Pfannenteil aufliegt, gemäß der Merkmalskombination nach Patentanspruch 1.The invention relates to an implant system comprising a concave spherical cap-shaped socket part and a corresponding convex spherical cap-shaped joint part, wherein the hinge part rests in the socket part, according to the feature combination according to claim 1.
Im Bereich der Prothesen sind viele Möglichkeiten von Materialkombinationen bekannt. Den Ursprung der Implantattechnologie kann in der Verwendung von Implantatstahl gesehen werden, wobei dieses Material auch heute noch Anwendung findet. In jüngster Zeit wird jedoch auch versucht, Implantate welche beispielsweise aus einer Metall (z. B. Implantatstahl oder Titan)/Keramik-Kombination bestehen, herzustellen.In the field of prostheses many possibilities of material combinations are known. The origin of implant technology can be seen in the use of implant steel, which material is still used today. Recently, however, attempts have also been made to produce implants which are made, for example, of a metal (eg implant steel or titanium) / ceramic combination.
Beispielsweise sei hier die Gebrauchsmusterschrift DE 203 20 454 U l genannt. In dieser Schrift wird eine Bauteilanordnung für eine Prothese, insbesondere eine Halswirbelsäulen-Bandscheibenprothese, offenbart, welche aus zwei Grundbauteilen mit angebrachten Gleitflächen besteht. H ierbei bestehen die Grundbauteile vorzugweise aus Poly-Ether-Ether-Keton und die Gleitflächen beispielsweise aus einer Co-Cr-Legierung . Da Poly-Ether-Ether- Keton ein ähnliches Elastizitätsmodul wie der kortikale Knochen aufweist, ist dieses Material hinsichtlich der guten Elastizitätsmerkmale besonders gut bei Verbindungsflächen der zu implantierenden Prothese und dem freigelegten Knochen geeignet. Um ein Anwachsen des Knochens an das PEEK-Material erzielen zu können, muss das Material jedoch einer speziellen Behandlung unterzogen werden. Die verwendete Co-Cr-Legierung bei den Gleitflächen wurde auf Grund der guten Gleiteigenschaften bei gleichzeitig geringem Abrieb des Materials verwendet.For example, here is the utility model DE 203 20 454 U l called. This document discloses a component arrangement for a prosthesis, in particular a cervical disc prosthesis, which consists of two basic components with attached sliding surfaces. H here are the basic components preferably made of polyether ether ketone and the sliding surfaces, for example, a Co-Cr alloy. Since polyether-ether ketone has a modulus of elasticity similar to that of cortical bone, this material is particularly well suited for bonding surfaces of the prosthesis to be implanted and the bone exposed for good elasticity characteristics. In order to achieve an increase of the bone to the PEEK material, however, the material must be subjected to a special treatment. The Co-Cr alloy used in the sliding surfaces was used due to the good sliding properties with low abrasion of the material.
Eine weitere Materialkombination wird in der DE 601 07 818 T2 verwendet. Diese Bandscheibenprothese für Halswirbelsäulen besteht zunächst aus einer ersten und einer zweiten Platte, die dazu bestimmt sind, an benachbarten Halswirbeln befestigt zu werden. Außerdem ist ein Kugelgelenk vorgesehen, das zwischen den beiden Platten angeordnet ist, welche übereinander liegend befestigt sind, wobei das Kugelgelenk aus einer kugelförmigen Kappe besteht, die mit einer kugelförmigen Haube zusammenarbeitet. Die Platten können vorteilhafterweise in Titan ausgeführt werden, wobei die Kontaktoberfläche mit den Wirbelplatten der Wirbel zum Beispiel mit Hydroxylapatit oder Titan mit Oberflächenwirkung überzogen sind, um die Verankerung zwischen der Prothese und den benachbarten Knochen zu verbessern. Das Kugelgelenk kann wiederum eine andere Materialkombination aufweisen. Die kugelförmige Haube kann beispielsweise aus Zirkoniumoxid ausgeführt werden, während die korrespondierende kugelförmige Kappe aus Aluminiumoxid ausgeführt sind .Another combination of materials is used in DE 601 07 818 T2. This cervical intervertebral disc prosthesis initially consists of a first and a second plate intended to be attached to adjacent cervical vertebrae. In addition, a ball joint is provided, which is arranged between the two plates, which are mounted one above the other, wherein the ball joint consists of a spherical cap which cooperates with a spherical cap. The plates can be advantageously carried out in titanium, the Contact surface with the vortex plates of the vertebrae, for example, with hydroxyapatite or titanium coated with surface effect, in order to improve the anchoring between the prosthesis and the adjacent bones. The ball joint can in turn have a different combination of materials. For example, the spherical cap may be made of zirconia, while the corresponding spherical cap may be made of alumina.
Materialkombinationen bei Prothesen werden folglich verwendet, um je nach Aufgabengebiet des einzelnen Bauteils das am besten geeignete Material verwenden zu können. Dies geht jedoch oftmals mit einer kosten- und zeitaufwändigeren Produktion einher.Material combinations in prostheses are therefore used to be able to use the most suitable material depending on the task of the individual component. However, this often goes hand in hand with more costly and time-consuming production.
Um Kosten und Zeit zu sparen wird außerdem versucht, Prothesen der oben genannten Art nur aus einem Werkstoff, wie z. B. Keramik herzustellen. Dieser Werkstoff besticht vor allem durch seine Gewebefreundlichkeit und seiner Eigenschaft keine Stoffe an die Umgebung abzugeben, wie dies beispielsweise bei Metallimplantaten (z. B. CoCr) der Fall ist. Bei sensiblen Personen können dadurch unangenehmen Reaktionen ausgelöst werden. Keramikimplantate haben also den Vorteil, dass sie auch bei Personen eingesetzt werden können, die empfindlich auf Metall reagieren.In order to save costs and time is also trying prostheses of the type mentioned above only from a material such. B. ceramic manufacture. Above all, this material stands out due to its tissue-friendliness and its property of not delivering any substances to the environment, as is the case, for example, with metal implants (eg CoCr). In the case of sensitive persons, this can cause unpleasant reactions. So ceramic implants have the advantage that they can also be used by people who are sensitive to metal.
Keramik weist allerdings einen entscheidenden Nachteil auf. Prothesen die beispielsweise als Kugelgelenk ausgebildet sind oder ein solches beinhalten, können wirtschaftlich nicht so gefertigt werden, dass die kugelförmige Haube und die kugelförmige Kappe spielfrei mit der ganzen Oberfläche aufeinander aufliegen (Dies kann auch bei Metallimplantaten nicht erreicht werden). Jedes Kugelgelenk ist schlussendlich auf Grund dieses Spiels dazu verdammt, entweder eine Punktauflage oder ein Ringauflage zu haben. Derartige Punktauflage wirken sich bei einem keramischen Material unter Umständen jedoch derartig aus, dass es unter Hinzukommen von Zugkräften zu einem verfrühten Verschleiß der Prothese kommt und ein Bruch oder ein Verschieben der Prothese die Folge ist.However, ceramic has a decisive disadvantage. Prostheses which are formed, for example, as a ball joint or include such, can not be economically produced so that the spherical cap and the spherical cap play with each other without play with the whole surface (this can not be achieved even with metal implants). Each ball joint is ultimately condemned to having either a point pad or a ring pad due to this game. Under certain circumstances, however, such point support may have such a effect on a ceramic material that premature wear of the prosthesis occurs with the addition of tensile forces, resulting in breakage or displacement of the prosthesis.
Derartige Prothesen müssen in einer Operation wieder entfernt werden und durch ein neues Implantatsystem ersetzt werden, wobei diese Operation mit neuerlichen Schmerzen und Unannehmlichkeiten beim Patienten einhergeht. Aus dem Vorgenannten ist es daher die Aufgabe der vorliegenden Erfindung ein Implantatsystem zur Verfügung zu stellen, welches eine ideale Kraftverteilung innerhalb eines Implantatsystems und eine verbesserte Langlebigkeit des Implantatsystems ermöglicht.Such prostheses must be removed in an operation and replaced with a new implant system, this operation is accompanied by renewed pain and discomfort in the patient. From the foregoing, it is therefore the object of the present invention to provide an implant system which enables an ideal distribution of force within an implant system and an improved longevity of the implant system.
Die Lösung der Aufgabe erfolgt durch ein Implantatsystem, welches ein konkaves kugelkalottenförmiges Pfannenteil und ein korrespondierendes konvexes kugelkalottenförmiges Gelenkteil umfasst, wobei das Gelenkteil im Pfannenteil aufliegt, gemäß der Merkmalkombination nach Patentanspruch 1, wobei die Unteransprüche mindestens zweckmäßige Ausgestaltungen und Weiterbildungen darstellen.The object is achieved by an implant system, which comprises a concave spherical cup-shaped socket part and a corresponding convex spherical cap-shaped hinge part, wherein the hinge part rests in the socket part, according to the feature combination according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.
Erfindungsgemäß sind an der Oberfläche des Gelenkteils oder an der Oberfläche des Pfannenteils mindestens drei Auflageelemente angeordnet, welche ein Kugeldreieck bzw. ein Kugelvieleck beschreiben.According to the invention, at least three support elements are arranged on the surface of the joint part or on the surface of the socket part, which describe a ball triangle or a spherical polygon.
Bei den beschriebenen kugelkalottenförmigen Pfannen- und Gelenkteilen kann es sich einerseits um Bauteile eines Hüft-, Knie-, Ellenbogen-, Sprungoder Handgelenks handeln. Andererseits können die kugelkalottenförmigen Elemente Teile eines Implantatsystems für Bandscheibenprothesen im Wirbelsäulenbereich darstellen.The described spherical cap-shaped socket and joint parts may on the one hand be components of a hip, knee, elbow, jump or wrist. On the other hand, the spherical cap-shaped elements may represent parts of an implant system for intervertebral disc prostheses in the spinal region.
Der Vorteil der Auflageelemente auf der Oberfläche des Pfannen- oder Gelenkteils besteht zum einen darin, dass die gesamte auf das Implantatsystem wirkende Last auf mindestens drei Punkte verteilt werden kann, anstatt wie üblich auf einen Punkt. Zum anderen kann das Gelenkteil bei Vorhandensein mindesten dreier Auflageelemente innerhalb des Pfannenteils keine Translation innerhalb des herstellungsüblichen Spiels aufweisen.The advantage of the support elements on the surface of the socket or joint part is, on the one hand, that the entire load acting on the implant system can be distributed over at least three points, instead of one point as usual. On the other hand, in the presence of at least three support elements within the socket part, the hinge part can not have any translation within the customary play.
Die drei Auflageelemente sind auf der Oberfläche des Gelenk- oder Pfannenteils derart auf der konvexen oder konkaven Wölbung angeordnet, dass sie ein sphärisches Dreieck - auch Kugeldreieck genannt - (bei drei Auflageelementen) oder ein sphärisches Vieleck - auch Kugelviereck genannt - (bei mehr als drei Auflageelementen) begrenzen. Das bedeutet, dass zu keinem Zeitpunkt alle Auflageelemente auf einem Kreisbogen liegen. In einem besonders bevorzugten Ausführungsbeispiel sind die Auflageelemente um einen zentralen Punkt des kugelkalottenförmigen Gelenkteils oder Pfannenteils sphärisch um 120 ° angeordnet. Wobei diese Winkelangaben keiner Toleranz unterliegen (die Winkelangaben aus technischen Gründen nicht eingehalten werden müssen), da die mindestens drei vorhandenen Auflageelemente immer auf der Oberfläche des Pfannenteils oder des Gelenkteils anliegen.The three support elements are arranged on the surface of the joint or socket part on the convex or concave curvature that they a spherical triangle - also called a ball triangle - (in three support elements) or a spherical polygon - also called ball quadrangle - (more than three Limit support elements). This means that at no time all support elements lie on a circular arc. In a particularly preferred embodiment, the support elements are arranged around a central point of the spherical cap-shaped joint part or pan part spherically by 120 °. Whereby these angle specifications are not subject to any tolerance (for technical reasons the angle specifications do not have to be complied with), since the at least three existing support elements always rest on the surface of the socket part or of the joint part.
Bei der Anordnung von mehr als drei Auflageelementen ist es von Vorteil, diese derart anzuordnen, dass die einzelnen Elemente um einen zentralen Punkt des Gelenkteils oder Pfannteils sphärisch im gleichen Winkel angeordnet sind .In the arrangement of more than three support elements, it is advantageous to arrange them such that the individual elements are arranged around a central point of the joint part or pan part spherically at the same angle.
Die Auflageelemente sind erfindungsgemäß als punktuelle Erhebungen der Oberfläche des kugelkalottenförmigen Gelenkteils oder des kugelkalottenförmigen Pfannenteils gestaltet. Auf der beispielsweise gewölbten Oberfläche des Gelenkteils oder des Pfannenteils sind also einzelne Elemente angebracht, welche die punktuellen Erhebungen der Auflageelemente formen. So kann es sich bei den Elementen beispielsweise um kalottenförmige oder pyramidenförmige Formgestaltungen handeln, die aufgrund ihrer Auflage auf der Oberfläche des Gelenkteils oder des Pfannteils (je nach dem auf welchem Teil die Auflageelemente angebracht sind) Auflageelemente in Form punktueller Erhebungen darstellen.The support elements are designed according to the invention as punctual elevations of the surface of the spherical cap-shaped hinge part or the spherical cap-shaped pan part. On the example, curved surface of the joint part or the cup part so individual elements are attached, which form the punctual elevations of the support elements. Thus, for example, the elements may be dome-shaped or pyramid-shaped shapes which, due to their bearing on the surface of the joint part or of the socket part (depending on the part on which the support elements are mounted) represent support elements in the form of punctiform elevations.
An dieser Stelle sei darauf hingewiesen, dass die in den Ausführungsformen beschriebenen gewölbten Oberflächen des Gelenk- und Pfannenteils nur eine beispielhafte Form der Einzelteile des Implantatsystems darstellen. So können die Oberflächen beispielsweise auch plan ausgestaltet sein oder mit Schrägen versehen sein.It should be noted at this point that the curved surfaces of the joint and socket part described in the embodiments represent only an exemplary form of the individual parts of the implant system. For example, the surfaces can also be designed plan or be provided with bevels.
In einer weiteren Ausführungsform sind die Auflageelemente als flächige Erhebungen gegenüber der Oberfläche des kugelkalottenförmigen Gelenkteils oder Pfannenteils gestaltet. In diesem Fall sind auf der Oberfläche des Gelenk- oder Pfannteils Elemente in Form von bspw. kleinen Prismen oder Zylindern angebracht, welche aufgrund ihrer Auflage auf der Oberfläche des Gelenkteils oder Pfannenteils ein Auflageelement in Form einer flächigen Erhebung ergeben. Außerdem ist es denkbar, dass die Auflageelemente nicht nur auf einem gleichmäßig gewölbten Pfannen- oder Gelenkteil gebildet sind, sondern die jeweiligen Oberflächen des Pfannen- oder Gelenkteils im Bereich der Auflageelemente eine Ebene oder Aussparung bilden oder einen, bezogen auf die gesamte Gelenkteil- oder Pfannenteiloberfläche, geringeren Krümmungsradius aufweisen.In a further embodiment, the support elements are designed as a flat elevations relative to the surface of the spherical cap-shaped joint part or pan part. In this case, elements in the form of, for example, small prisms or cylinders are mounted on the surface of the joint or pan part, which give a support element in the form of a flat elevation due to their support on the surface of the joint part or socket part. Moreover, it is conceivable that the support elements are not only formed on a uniformly curved socket or joint part, but the respective surfaces of the socket or joint part in the support elements form a level or recess or one, based on the entire Gelenkteil- or pan part surface , have a smaller radius of curvature.
Durch eine derartige Gestaltungen kann eine zugkraftfreie Konstruktion des Implantatsystems gebildet werden.By such a design, a traction-free construction of the implant system can be formed.
Vorzugsweise besteht das gesamte beschriebene Implantatsystem aus einem Keramikmaterial . Es ist jedoch auch denkbar, die beschriebene Anbringung der Auflageelemente in einem Metall- oder Kunststoffimplantat zu verwirklichen. Wobei als beispielhaftes Metallmaterial Titan und als Kunststoffmaterial PEEK genannt sein. Des Weiteren sind Materialkombinationen denkbar, wonach das Gelenkteil beispielsweise aus Titan und das Gelenkteil u . a. aus PEEK hergestellt sein kann.Preferably, the entire implant system described consists of a ceramic material. However, it is also conceivable to realize the described attachment of the support elements in a metal or plastic implant. Where as an exemplary metal material titanium and PEEK as a plastic material may be mentioned. Furthermore, material combinations are conceivable, according to which the joint part, for example, titanium and the joint part u. a. can be made of PEEK.
Die Auflageelemente sind wiederum vorzugsweise aus Keramik gefertigt. Wobei in einer beispielhaften Ausführungsform derartige Keramik- Auflageelemente in die Titan- oder PEEK-Platten des Gelenk- oder Pfannenteils eingepresst sind .The support elements are again preferably made of ceramic. In an exemplary embodiment, such ceramic support elements are pressed into the titanium or PEEK plates of the joint or socket part.
Zweckmäßigerweise weisen die Auflageelemente eine geringere Rauhigkeit als die restliche Oberfläche des Pfannen- oder Gelenkteils auf, sodass die Auflageelemente glatter als die restliche Oberfläche des jeweiligen Bauteils des Implantatsystems sind .Expediently, the support elements have a lower roughness than the remaining surface of the socket or joint part, so that the support elements are smoother than the remaining surface of the respective component of the implant system.
Um eine derartig glatte Oberfläche zu erhalten sind die Auflageelemente oberflächenbehandelt. Vorzugsweise werden die Elemente poliert, weil dies ein relativ einfacher Produktionsschritt ist. Dies hat den Vorteil, dass nicht das ganze Teil, auf dem die Auflageelemente angeordnet sind poliert werden muss, sondern nur die Auflageelemente bearbeitet werden, welche mit dem korrespondierenden Implantatsystemteil in Berührung kommen.In order to obtain such a smooth surface, the support elements are surface-treated. Preferably, the elements are polished because this is a relatively simple production step. This has the advantage that not the entire part on which the support elements are arranged must be polished, but only the support elements are processed, which come into contact with the corresponding implant system part.
Außerdem ist es möglich, dass die Auflageelemente mit einem anderen Material beschichtet sind, sodass durch die Materialbeschichtung beispielsweise eine glattere oder widerstandsfähigere Oberfläche gestaltet werden kann.It is also possible that the support elements are coated with a different material, so through the material coating For example, a smoother or more resistant surface can be designed.
Des Weiteren ist es denkbar, die zum Knochen weisenden Oberflächen des Implantatsystems zu beschichten. So ist beispielsweise eine Beschichtung mit Titan oder speziellen Keramiken denkbar, um zum einen die mechanischen Eigenschaften des Implantatsystems zu ändern und zum anderen ein verbessertes Anwachsen des Knochens an das Implantatsystem zu gewährleisten.Furthermore, it is conceivable to coat the bone-facing surfaces of the implant system. Thus, for example, a coating with titanium or special ceramics is conceivable, on the one hand to change the mechanical properties of the implant system and, on the other hand, to ensure an improved growth of the bone to the implant system.
Das beschriebene Implantatsystem mit den erfindungsgemäßen Auflageelementen kann vorzugweise im Zusammenhang mit Prothesen im Wirbelsäulenbereich Verwendung finden. So ist eine Verwendung als Bandscheibenprothese denkbar.The implant system described with the support elements according to the invention can preferably be used in connection with prostheses in the spinal area. So a use as an intervertebral disc prosthesis is conceivable.
Allerdings ist es auch möglich, die beschriebene Konstruktion bei der Herstellung von Hüftimplantaten zu verwenden. Das beschriebene Pfannenteil stellt in einem derartigen Fall beispielsweise die Hüftpfanne und das Gelenkteil den am Oberschenkelknochen befindliche Gelenkknochen dar.However, it is also possible to use the construction described in the manufacture of hip implants. The socket part described in such a case, for example, the acetabulum and the joint part is the joint bone located on the thigh bone.
Die Erfindung soll nachstehend anhand mehrerer Ausführungsbeispiele sowie unter Zuhilfenahme von Figuren näher erläutert werden. Hierbei zeigen :The invention will be explained in more detail below with reference to several embodiments and with the aid of figures. Hereby show:
Fig. 1 eine Darstellung eines erfindungsgemäßen Implantatsystems mit Auflageelementen als punktuelle Erhebungen;1 shows a representation of an implant system according to the invention with supporting elements as punctiform elevations;
Fig. 2 Darstellung des am Pfannenteil aufliegenden Auflageelements;FIG. 2 shows the support element resting on the socket part; FIG.
Fig. 3 Darstellung eines erfindungsgemäßen Implantatsystems mit in das Gelenkteil eingebrachte Aussparungen und Auflageelementen in Form flächiger Erhebungen undFig. 3 representation of an implant system according to the invention with introduced into the joint part recesses and support elements in the form of flat elevations and
Fig. 4 eine weitere Darstellung eines erfindungsgemäßenFig. 4 is a further illustration of an inventive
Implantatsystem mit in das Gelenkteil eingebrachten Aussparungen und Auflageelementen in Form flächiger Erhebungen.Implant system with introduced into the joint part Recesses and support elements in the form of flat elevations.
Wie in Fig . 1 dargestellt, besteht das erfindungsgemäße Implantatsystem aus einem Gelenkteil 1 und dem Pfannenteil 2. Dabei ist ersichtlich, dass das Gelenkteil 2 in Form eines konvexen kugelkalottenförmigen Elements gebildet ist und das Pfannenteil 2 in Form eines korrespondierenden konkaven kugelkalottenförmigen Elements.As shown in FIG. 1, the implant system consists of a joint part 1 and the socket part 2. It can be seen that the joint part 2 is formed in the form of a convex spherical cap member and the socket part 2 in the form of a corresponding concave spherical cap shaped element.
Nach Ausführungsform der Fig . 1 befinden sich auf dem Gelenkteil 1 drei Auflageelemente 3, welche um den zentralen Punkt des gewölbten Gelenkteils sphärisch um 120 ° zueinander angeordnet sind. Des Weiteren wird deutlich, dass die Auflageelemente 3 ein Kugeldreieck beschreiben. Bei gedachten Verbindungslinien schließen die Auflageelemente 3 ein sphärisches Dreieck ein. Werden jedoch mehr als 3 Auflagepunkte verwendet schließen diese ein Kugelvieleck ein. Der Vorteil bei der Konstruktion eines Implantatsystems mit drei Auflageelementen besteht darin, dass unabhängig der Abstände der Auflageelemente zueinander und der Einhaltung von Toleranzen, die Auflageelemente immer in der Kugelkalotte aufliegen.According to the embodiment of FIG. 1 are located on the hinge part 1 three support elements 3, which are arranged around the central point of the curved hinge part spherical at 120 ° to each other. Furthermore, it is clear that the support elements 3 describe a ball triangle. For imaginary connecting lines, the supporting elements 3 enclose a spherical triangle. However, if more than 3 points of support are used, they will include a sphere polygon. The advantage in the construction of an implant system with three support elements is that regardless of the distances of the support elements to each other and the maintenance of tolerances, the support elements always rest in the spherical cap.
Das Zusammenspiel zwischen den Auflageelementen 3 und dem in Berührung stehenden Pfannenteil 2 wird in Fig . 2 dargestellt. Der Ausschnitt zeigt ein am Gelenkteil 1 angeordnetes Auflageelement 3, welches die konkav geformte Oberfläche des Pfannenteils 2 berührt. Aufgrund der Ausführung des Auflageelements 3 als Kugelkalotte findet eine Punktberührung statt.The interaction between the support elements 3 and the contacting socket part 2 is shown in FIG. 2 shown. The section shows a arranged on the hinge part 1 support element 3, which contacts the concave-shaped surface of the socket part 2. Due to the design of the support element 3 as a spherical cap, a point contact takes place.
In Fig. 3 wird ein weiteres Ausführungsbeispiel des erfindungsgemäßen Implantatsystems dargestellt. Auch in diesem Fall befinden sich die drei Auflageelemente 3 auf der Oberfläche des Gelenkteils 1, jedoch nicht unmittelbar auf einer gleichmäßig konvex geformten Oberfläche sondern auf einer Aussparung 4. Diese Aussparung 4 weist eine konkave Wölbung auf in dessen Mitte jeweils die Auflageelemente 3 angebracht sind . Die konkaven Wölbungen dienen dazu eine zugfreie Konstruktion zur Verfügung zu stellen, welche besonders bei der Herstellung eines Keramikimplantatsystems von Bedeutung ist.FIG. 3 shows a further exemplary embodiment of the implant system according to the invention. Also in this case, the three support elements 3 are on the surface of the joint part 1, but not directly on a uniformly convex surface but on a recess 4. This recess 4 has a concave curvature in the middle of each of the support elements 3 are mounted. The concave curvatures serve to provide a draft-free construction which is particularly important in the manufacture of a ceramic implant system.
Außerdem ist bei der Ausführungsform nach den Fig . 3 und 4 zu beachten, dass es sich in diesem Fall um Auflageelemente 3 in Form einer flächigen Erhebung handelt. Das heißt, die Auflageelemente 3 haben eine Grundform eines Kegelstumpfes, der bekanntlich an seiner Oberseite abgeflacht ist. Diese Abflachung steht bei einem zusammengesetzten Implantatsystem vollständig mit der Oberfläche des Pfannenteils 2 in Berührung .In addition, in the embodiment according to FIGS. 3 and 4 to note that it is in this case support elements 3 in the form of a flat survey. That is, the support elements 3 have a basic shape of a truncated cone, which is known to be flattened at its top. This flattening is completely in contact with the surface of the socket part 2 in a composite implant system.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Gelenkteil1 joint part
2 Pfannenteil2 pan part
3 Auflageelement3 support element
4 Aussparung 4 recess

Claims

Patentansprüche claims
1. Implantatsystem umfassend ein konkaves kugelkalottenförmiges Pfannenteil (2) und ein korrespondierendes konvexes kugelkalottenförmiges Gelenkteil (1), wobei das Gelenkteil (1) im Pfannenteil (2) aufliegt und an der Oberfläche des Gelenkteils (1) oder an der Oberfläche des Pfannenteils (2) mindestens drei Auflageelemente (3) angeordnet sind, welche ein Kugeldreieck bzw. ein Kugelvieleck beschreiben.1. implant system comprising a concave spherical cup-shaped socket part (2) and a corresponding convex spherical cap-shaped joint part (1), wherein the hinge part (1) in the socket part (2) rests and on the surface of the joint part (1) or on the surface of the socket part (2 ) at least three support elements (3) are arranged, which describe a ball triangle or a spherical polygon.
2. Implantatsystem nach Anspruch 1, dadurch gekennzeichnet, dass die Auflageelemente (3) um einen zentralen Punkt des kugelkalottenförmigen Gelenkteils (1) oder Pfannenteils (2) sphärisch um 120° angeordnet sind .2. Implant system according to claim 1, characterized in that the support elements (3) about a central point of the spherical cap-shaped joint part (1) or socket part (2) are arranged spherically at 120 °.
3. Implantatsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Auflageelemente (3) als punktuelle Erhebungen der Oberfläche des kugelkalottenförmigen Gelenkteils (1) oder Pfannenteils (2) ausgestaltet sind .3. Implant system according to claim 1 or 2, characterized in that the support elements (3) are designed as punctual elevations of the surface of the spherical cap-shaped joint part (1) or socket part (2).
4. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Auflageelemente (3) als flächige Erhebungen der Oberfläche des kugelkalottenförmigen Gelenkteils (1) oder Pfannenteils (2) ausgestaltet sind .4. Implant system according to one of the preceding claims, characterized in that the support elements (3) are designed as surface elevations of the surface of the spherical cap-shaped joint part (1) or socket part (2).
5. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Auflageelemente (3) auf einzelnen Ebenen, Aussparungen (4) oder Oberflächenabschnitten der kugelkalottenförmigen Gelenkteiloberfläche oder Pfannenteiloberfläche, welche einen bezogen auf die Gelenkteiloder Pfannenteiloberfläche geringeren Krümmungsradius aufweisen, angeordnet sind . 5. Implant system according to one of the preceding claims, characterized in that the support elements (3) on individual levels, recesses (4) or surface portions of the spherical cap-shaped joint part surface or pan part surface, which have a relation to the Gelenkteiloder Pfannenteiloberfläche smaller radius of curvature, are arranged.
6. Implantatsystem nach einem der vorangegangenen Ansprüche dadurch gekennzeichnet, dass das Implantatsystem aus Keramik besteht.6. Implant system according to one of the preceding claims, characterized in that the implant system consists of ceramic.
7. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das Implantatsystem aus PEEK besteht.7. Implant system according to one of the preceding claims, characterized in that the implant system consists of PEEK.
8. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das Implantatsystem aus Titan besteht.8. Implant system according to one of the preceding claims, characterized in that the implant system consists of titanium.
9. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Auflageelemente aus Keramik gefertigt sind .9. implant system according to one of the preceding claims, characterized in that the support elements are made of ceramic.
10. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Auflageelemente (3) eine geringere Rauhigkeit als die Oberfläche des Pfannenteils (2) oder des Gelenkteils (1) aufweisen.10. Implant system according to one of the preceding claims, characterized in that the support elements (3) have a lower roughness than the surface of the socket part (2) or of the joint part (1).
11. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Auflageelemente (3) oberflächenbehandelt sind .11. Implant system according to one of the preceding claims, characterized in that the support elements (3) are surface-treated.
12. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Auflageelemente (3) poliert sind .12. Implant system according to one of the preceding claims, characterized in that the support elements (3) are polished.
13. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Auflageelemente (3) mit einem anderen Material beschichtet sind . 13. Implant system according to one of the preceding claims, characterized in that the support elements (3) are coated with a different material.
14. Implantatsystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die zum Knochen gerichteten Seiten des Implantatsystems beschichtet sind .14. Implant system according to one of the preceding claims, characterized in that the bone-facing sides of the implant system are coated.
15. Implantatsystem nach Anspruch 14, dadurch gekennzeichnet, dass es sich bei der Beschichtung beispielsweise um Titan oder spezieller Keramik handelt.15. Implant system according to claim 14, characterized in that the coating is, for example, titanium or special ceramic.
16. Verwendung eines Implantatsystems nach einem der vorangegangenen Ansprüche in Zusammenhang mit Prothesen im Wirbelsäulenbereich.16. Use of an implant system according to one of the preceding claims in connection with prostheses in the spinal region.
17. Verwendung eines Implantatsystems nach einem der vorangegangenen Ansprüche in Zusammenhang mit einem Hüftgelenk. 17. Use of an implant system according to one of the preceding claims in connection with a hip joint.
EP10706649A 2009-03-04 2010-03-04 Implant system having at least three support elements Withdrawn EP2403432A1 (en)

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DE102009011648A DE102009011648A1 (en) 2009-03-04 2009-03-04 Implant system with support elements
PCT/EP2010/052750 WO2010100222A1 (en) 2009-03-04 2010-03-04 Implant system having at least three support elements

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EP (1) EP2403432A1 (en)
JP (1) JP2012519507A (en)
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WO2010100222A1 (en) 2010-09-10
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US20120136443A1 (en) 2012-05-31
US8920501B2 (en) 2014-12-30
DE102009011648A1 (en) 2010-09-09

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