DE4128259C2 - - Google Patents
Info
- Publication number
- DE4128259C2 DE4128259C2 DE4128259A DE4128259A DE4128259C2 DE 4128259 C2 DE4128259 C2 DE 4128259C2 DE 4128259 A DE4128259 A DE 4128259A DE 4128259 A DE4128259 A DE 4128259A DE 4128259 C2 DE4128259 C2 DE 4128259C2
- Authority
- DE
- Germany
- Prior art keywords
- acetabular cup
- elongated holes
- longitude
- bone
- cup according
- 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.)
- Expired - Fee Related
Links
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4609—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30354—Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30405—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
- A61F2002/305—Snap connection
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30784—Plurality of holes
- A61F2002/30787—Plurality of holes inclined obliquely with respect to each other
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
- A61F2002/3403—Polar aperture
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
- A61F2002/3406—Oblong apertures
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3429—Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
- A61F2002/3435—Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line peripheral lip, e.g. elastic lip
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3453—Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped
- A61F2002/3462—Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped having a frustoconical external shape, e.g. entirely frustoconical
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/348—Additional features
- A61F2002/3482—Two hemispherical halves having completely different structures
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
Description
Die Erfindung betrifft eine Hüftgelenkpfanne mit einer im wesentlichen kugeligen Außenfläche und mit Öffnungen zur Aufnahme von Knochenschrauben, von denen wenigstens eine als Langloch ausgebildet ist.The invention relates to an acetabular cup with a essentially spherical outer surface and with openings for Inclusion of bone screws, at least one of which is designed as an elongated hole.
Hüftgelenkpfannen dieser Art sind beispielsweise in der DE 33 31 191 A1 und in der DE 39 01 885 A1 beschrieben. Derartige Hüftgelenkpfannen sind nicht als Einschraub pfannen ausgebildet, sondern sie werden in eine halbkugel förmige Ausnehmung im Hüftgelenkknochen eingedrückt und in dieser Position durch Knochenschrauben verankert, die durch Öffnungen in der Pfanne von innen her in den angren zenden Hüftknochen eingeschraubt werden.Acetabular cups of this type are, for example, in the DE 33 31 191 A1 and described in DE 39 01 885 A1. Such acetabular cups are not a screw-in pans trained, but they are in a hemisphere shaped recess in the hip bone and pressed in this position anchored by bone screws that through openings in the pan from the inside in the angren screwed hip bones.
Dabei können die Öffnungen für den Durchtritt der Knochen schrauben einen kreisförmigen Querschnitt aufweisen, es sind auch Langlöcher bekannt, die sich parallel zu einem Längengrad der Hüftpfanne erstrecken, also parallel zur Schnittlinie zwischen der Außenfläche der Hüftpfanne und einer vertikalen, radialen Schnittebene. Dadurch sind in gewissem Umfange Positionskorrekturen beim Einsetzen und beim Einschrauben der Knochenschrauben möglich.The openings for the passage of the bones screws have a circular cross section, it oblong holes are also known which are parallel to one another Longitude of the acetabulum extend, so parallel to Line of intersection between the outer surface of the acetabulum and a vertical, radial cutting plane. This means that To some extent position corrections when inserting and possible when screwing in the bone screws.
Es ist Aufgabe der Erfindung, Hüftgelenkpfannen der be kannten Art so weiterzubilden, daß die Positionskorrektur möglichkeiten beim Einsetzen der Hüftpfanne verbessert und daß eine erhöhte Sicherheit der Verankerung durch die Knochenschrauben erreicht werden kann.It is an object of the invention to be acetabular cups known kind so that the position correction possibilities when inserting the acetabulum improved and that increased security of anchorage through the Bone screws can be achieved.
Diese Aufgabe wird bei einer Hüftgelenkpfanne der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß zwei Langlöcher vorgesehen sind, die in Umfangsrichtung gegen einander versetzt sind und spiegelsymmetrisch zu einer zwischen ihnen positionierten Schnittlinie einer senkrech ten Radialebene und der Oberfläche (Längengrad) der Pfanne angeordnet sind, und daß die Längsrichtung der Langlöcher jeweils schräg zum Längengrad angeordnet ist.This task is the beginning of an acetabular cup described type according to the invention solved in that two Elongated holes are provided which oppose in the circumferential direction are offset and mirror-symmetrical to one a vertical line of intersection positioned between them radial plane and the surface (longitude) of the pan are arranged, and that the longitudinal direction of the elongated holes is arranged at an angle to the longitude.
Diese schräge Anordnung der Langlöcher ermöglicht eine Korrektur der Position nicht nur parallel zu einem Längen grad, sondern auch quer dazu, so daß der Operateur auch nach dem Einschrauben der Knochenschraube in den Knochen die Position der Pfanne in beliebiger Weise korrigieren kann. Zusätzlich zur Variabilität der Befestigung wird durch die Verwendung von zwei spiegelbildlich zueinander angeordneten Langlöchern gleichzeitig eine Verspannung be wirkt, durch die eine sichere Verankerung der Hüftgelenk pfanne erzielt wird.This oblique arrangement of the elongated holes enables one Correction of the position not only parallel to a length degree, but also across it, so that the surgeon too after screwing the bone screw into the bone correct the position of the pan in any way can. In addition to the variability of the attachment by using two mirror images of each other arranged elongated holes at the same time be bracing acts by securely anchoring the hip joint pan is achieved.
Ein erheblicher Vorteil der Verwendung schräg angeordneter Langlöcher ist auch darin zu sehen, daß die Knochen schrauben bei bereits eingesetzter Hüftpfanne in unter schiedliche Bereiche des benachbarten Knochens einge schraubt werden können. Der Operateur hat damit die Mög lichkeit, die Knochenschrauben in den Knochenbereich ein zusetzen, in dem eine besonders gute Verankerung gewähr leistet ist. Das umgebende Knochengewebe der Hüftpfanne ist nämlich nicht in allen Bereichen geeignet, eine Knochenschraube in voller Länge aufzunehmen oder sie wirk lich fest zu verankern, eine solche Möglichkeit besteht nur in Teilbereichen des umgebenden Knochens. Damit wird dem Operateur eine größere Freiheit beim Einschrauben der Knochenschrauben gewährleistet.A significant advantage of using slanted ones Elongated holes can also be seen in the bones screw in with the hip socket already inserted different areas of the adjacent bone can be screwed. This gives the surgeon the opportunity the bone screws in the bone area add, in which a particularly good anchoring ensures is accomplished. The surrounding bone of the acetabulum is not suitable in all areas, one Bone screw in full length or take effect anchored firmly, such a possibility exists only in parts of the surrounding bone. So that will the surgeon greater freedom when screwing in the Bone screws guaranteed.
Die spiegelsymmetrische Anordnung der Langlöcher ermög licht außerdem die Verwendung sowohl auf der linken als auch auf der rechten Körperseite, ohne daß dafür unter schiedliche Pfannenmodelle notwendig wären.The mirror-symmetrical arrangement of the elongated holes enables also use both on the left and also on the right side of the body, without being under different pan models would be necessary.
Beispielsweise kann zwischen der Längsrichtung jedes Lang loches und dem Längengrad ein Winkel von etwa 30° einge schlossen sein.For example, each long can be between the longitudinal direction loches and the longitude an angle of about 30 ° be closed.
Vorzugsweise sind die beiden Langlöcher in Umfangsrichtung um maximal 60° gegeneinander versetzt, das heißt sie kon zentrieren sich auf einen relativ engen Bereich, da auch der die Pfanne umgebende Knochen nur in einem relativ en gen Winkelbereich eine optimale Verankerung der Knochen schrauben gewährleistet.The two elongated holes are preferably circumferential offset from each other by a maximum of 60 °, that means they con center on a relatively narrow area as well the bone surrounding the pan is only in a relatively large en optimal anchoring of the bones towards the angular range screws guaranteed.
Zwischen den beiden Langlöchern kann ein kreisrundes Loch zur Aufnahme einer weiteren Knochenschraube angeordnet sein, wobei vorzugsweise die Mittelpunkte der Langlöcher und des kreisrunden Lochs im wesentlichen auf derselben Höhe liegen. There can be a circular hole between the two oblong holes arranged to accommodate another bone screw be, preferably the centers of the elongated holes and the circular hole substantially on the same Height.
Für dieses kreisrunde Loch wird normalerweise eine Veran kerungsschraube mit einem kugelkalottenförmigen Kopf ge wählt, so daß die Verankerungsschraube nicht nur in exakt radialer Richtung eingeschraubt werden kann, sondern auch abweichend davon, dies gibt dem Operateur die Möglichkeit, die optimale Einschraubrichtung zu wählen, wobei dieses Merkmal zusammen mit den schräg angeordneten Langlöchern eine besonders große Variabilität der Verankerung bietet. Die genannten Öffnungen befinden sich alle in einem rela tiv engen Winkelbereich, der im wesentlichen dem ebenfalls engen Winkelbereich des umgebenden Knochens entspricht, der für die Verankerung die besten Voraussetzungen bietet.A veran is usually used for this circular hole tapping screw with a spherical cap-shaped head chooses so that the anchoring screw is not only in exact radial direction can be screwed, but also deviating from this, this gives the surgeon the opportunity to choose the optimal screwing direction, this Characteristic together with the obliquely arranged oblong holes offers a particularly large variability of the anchoring. The openings mentioned are all in a rela tiv narrow angular range, which is essentially the same corresponds to the narrow angular range of the surrounding bone, that offers the best conditions for anchoring.
Die nachfolgende Beschreibung bevorzugter Ausführungsfor men der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. Es zeigen:The following description of preferred embodiments Men of the invention is used in connection with the drawing the detailed explanation. Show it:
Fig. 1 eine perspektivische Ansicht einer Hüft gelenkpfanne von der Unterseite her und Fig. 1 is a perspective view of an acetabular cup from the bottom and
Fig. 2 eine Schnittansicht längs Linie 2-2 ei ner in den Hüftgelenkknochen eingesetz ten Hüftgelenkpfanne mit Kunststoffein satz. Fig. 2 is a sectional view taken along line 2-2 egg ner in the hip joint bone inserted th acetabular cup with plastic insert.
Die in der Zeichnung dargestellte Hüftgelenkpfanne 1 weist eine im wesentlichen halbkugelförmige Außenfläche 2 auf. Der Innenraum der Hüftgelenkpfanne 1 ist kegelstumpfartig ausgebildet, wobei sich an den kegelstumpfförmigen Teil 3 zur Unterseite ein kreiszylindrischer Bereich 4 an schließt. Im Übergang vom kegelstumpfförmigen Teil 3 in den kreiszylinderförmigen Bereich 4 ist eine umlaufende Hinterschneidung 5 angeordnet, die als Rastkante für einen in den Innenraum eingeschobenen Einsatz 6 dient, der so wohl den kegelstumpfförmigen Teil 3 als auch den sich dar an anschließenden kreiszylinderförmigen Bereich 4 voll ausfüllt und geringfügig nach unten aus der Hüftgelenk pfanne 1 hervorsteht.The acetabular cup 1 shown in the drawing has a substantially hemispherical outer surface 2 . The interior of the acetabular cup 1 is shaped like a truncated cone, with a circular cylindrical region 4 joining the truncated cone-shaped part 3 to the underside. In the transition from the frustoconical part 3 to the circular-cylindrical area 4 , a circumferential undercut 5 is arranged, which serves as a locking edge for an insert 6 inserted into the interior, which thus completely fills the frustoconical part 3 and the circular-cylindrical area 4 adjoining it and protrudes slightly downward from the hip joint socket 1 .
Dieser Einsatz 6, der beispielsweise aus Polyethylen be stehen kann, weist seinerseits eine im wesentlichen halb kugelförmige Lagerfläche 7 für den Gelenkkopf eines natür lichen oder künstlichen Femurs auf.This insert 6 , which may be made of polyethylene, for example, in turn has a substantially semi-spherical bearing surface 7 for the joint head of a natural or artificial femur.
Die Hüftgelenkpfanne 1 weist an ihrer höchsten Stelle eine Innengewindebohrung 8 auf, die vor dem Einschnappen des Einsatzes 6 in die Hüftgelenkpfanne 1 von der Innenseite her frei zugänglich ist, so daß darin zum Einsetzen ein Werkzeug eingeschraubt werden kann.The acetabular cup 1 has an internally threaded bore 8 at its highest point, which is freely accessible from the inside before the insert 6 snaps into the acetabular cup 1 , so that a tool can be screwed therein for insertion.
Im Mantel 8 der Hüftgelenkpfanne 1 befinden sich drei Schraubenlöcher zur Aufnahme von Knochenschrauben 10, näm lich ein erstes Schraubenloch 11 mit kreisförmigem Quer schnitt und symmetrisch zur Position dieses Schraubenlo ches 11 zu beiden Seiten umfangsmäßig versetzt zwei Lang löcher 12 und 13. Beide Langlöcher sind dabei so angeord net, daß ihre Längsrichtungen mit einem Längengrad der Hüftgelenkpfanne 1 einen Winkel einschließen, beispiels weise einen Winkel von 30°. Unter "Längengrad" wird dabei die Schnittlinie der Außenfläche 2 mit einer senkrechten Radialebene der Hüftgelenkpfanne verstanden.In the jacket 8 of the acetabular cup 1 there are three screw holes for receiving bone screws 10 , namely a first screw hole 11 with a circular cross section and symmetrically offset to the position of this screw hole 11 on both sides circumferentially offset two elongated holes 12 and 13 . Both slots are net angeord that their longitudinal directions include an angle with a degree of longitude of the acetabular cup 1 , example, an angle of 30 °. “Longitude” is understood to mean the line of intersection of the outer surface 2 with a vertical radial plane of the acetabular cup.
Beide Langlöcher 12 und 13 sind spiegelsymmetrisch zu ei nem Längengrad angeordnet, der durch das kreisförmige Schraubenloch hindurchgeht, das heißt auch ihre Neigung ist entgegengesetzt (Fig. 1).Both elongated holes 12 and 13 are arranged mirror-symmetrically to a degree of longitude that passes through the circular screw hole, that is, their inclination is opposite ( Fig. 1).
Dabei befinden sich die drei Schraubenlöcher 11, 12 und 13 etwa auf halber Höhe der Hüftgelenkpfanne 1, und sie sind am Rand derartig von innen nach außen konvergierend ausge bildet, daß die Köpfe der Knochenschrauben 10 am vollstän digen Hindurchstecken durch die Löcher gehindert sind, aber soweit in die Löcher eindringen, daß sie nicht nach innen über die Innenwand der Hüftgelenkpfanne 1 hervorste hen. Die Köpfe werden also vollständig im Wandmaterial der Hüftgelenkpfanne 1 aufgenommen.The three screw holes 11 , 12 and 13 are located approximately halfway up the acetabular cup 1 , and they converge from the inside to the outside in such a way that the heads of the bone screws 10 are prevented from being fully inserted through the holes, but penetrate so far into the holes that they do not protrude inwards over the inner wall of the acetabular cup 1 . The heads are thus completely absorbed in the wall material of the acetabular cup 1 .
Umfangsmäßig sind die Langlöcher 12 gegenüber dem kreis förmigen Schraubenloch 11 maximal um 30° versetzt, so daß alle drei Löcher 11, 12 und 13 innerhalb eines Winkelbe reiches von 60° angeordnet sind. Beim richtigen Einsetzen der Hüftgelenkpfanne ist es dadurch möglich, die Knochen schrauben in einem winkelmäßig eng begrenzten, optimalen Hüftgelenksknochenbereich einzuschrauben (Fig. 2).The circumferential slots 12 are offset from the circular screw hole 11 by a maximum of 30 °, so that all three holes 11 , 12 and 13 are arranged within a Winkelbe range of 60 °. When the acetabular cup is inserted correctly, it is possible to screw in the bones in an optimally narrow, optimally limited hip bone area ( Fig. 2).
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9110508U DE9110508U1 (en) | 1991-08-24 | 1991-08-24 | |
DE4128259A DE4128259A1 (en) | 1991-08-24 | 1991-08-24 | Socket for hip joint prosthesis - has elongated holes for screws which attach socket to pelvis. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9110508U DE9110508U1 (en) | 1991-08-24 | 1991-08-24 | |
DE4128259A DE4128259A1 (en) | 1991-08-24 | 1991-08-24 | Socket for hip joint prosthesis - has elongated holes for screws which attach socket to pelvis. |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4128259A1 DE4128259A1 (en) | 1993-03-04 |
DE4128259C2 true DE4128259C2 (en) | 1993-06-17 |
Family
ID=25906709
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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DE9110508U Expired - Lifetime DE9110508U1 (en) | 1991-08-24 | 1991-08-24 | |
DE4128259A Granted DE4128259A1 (en) | 1991-08-24 | 1991-08-24 | Socket for hip joint prosthesis - has elongated holes for screws which attach socket to pelvis. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE9110508U Expired - Lifetime DE9110508U1 (en) | 1991-08-24 | 1991-08-24 |
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DE (2) | DE9110508U1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4413038A1 (en) * | 1994-04-15 | 1995-10-19 | Alphanorm Medizintechnik Gmbh | Acetabular prosthesis |
DE10113614B4 (en) * | 2001-03-20 | 2004-01-29 | Eska Implants Gmbh & Co. | Set for creating an implant as a replacement for a destroyed pelvic bone socket |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4142920A1 (en) * | 1991-12-24 | 1993-07-01 | Chiropro Gmbh | Screwed bush for socket of hip joint prosthesis - has hand of screw thread chosen so that bush tends to tighten in use |
DE4205018C1 (en) * | 1992-02-19 | 1993-08-26 | Eska Medical Gmbh & Co, 2400 Luebeck, De | Artificial hip joint bearing shell - has bottom edge side opening to retain guiding pin, permitting alignment before inserting anchorage screws |
FR2701649B1 (en) * | 1993-02-17 | 1997-08-01 | Amp Medical | Cotyloid prosthesis. |
FR2725616B1 (en) * | 1994-10-12 | 1997-03-14 | Prost Didier | COTYLOIDIAN CUP AND PROSTHESIS |
DE19502503C1 (en) * | 1995-01-27 | 1996-09-26 | Amir Dr Zahedi | Modular bone implant with cup and pins |
DE29516473U1 (en) * | 1995-10-17 | 1995-12-07 | Keramed Medizintechnik Gmbh | Artificial acetabular cup |
DE29911853U1 (en) * | 1999-07-08 | 2000-11-23 | Biomet Merck Deutschland Gmbh | Cup for a hip joint endoprosthesis |
US7799086B2 (en) | 2002-04-25 | 2010-09-21 | Zimmer Technology, Inc. | Modular bone implant, tools, and method |
US20060229731A1 (en) * | 2005-04-12 | 2006-10-12 | Zimmer Technology, Inc. | Acetabular implant with a tapered bearing-locking flange |
US8608805B2 (en) | 2005-09-16 | 2013-12-17 | Zimmer Gmbh | Insert and shell of a joint ball receptacle |
EP1787603A1 (en) | 2005-11-18 | 2007-05-23 | Zimmer GmbH | Basis-platform for an artificial joint |
WO2007084939A2 (en) | 2006-01-20 | 2007-07-26 | Zimmer Technology, Inc. | Shoulder arthroplasty system |
WO2007108848A1 (en) | 2006-03-20 | 2007-09-27 | Smith & Nephew, Inc. | Acetabular cup assembly for multiple bearing materials |
US8123815B2 (en) | 2008-11-24 | 2012-02-28 | Biomet Manufacturing Corp. | Multiple bearing acetabular prosthesis |
US8308810B2 (en) | 2009-07-14 | 2012-11-13 | Biomet Manufacturing Corp. | Multiple bearing acetabular prosthesis |
DE102018101657A1 (en) | 2018-01-25 | 2019-07-25 | Aesculap Ag | Medical bone screw and implant system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8324860U1 (en) * | 1983-08-30 | 1985-08-08 | orthoplant Endoprothetik GmbH, 2800 Bremen | Hip joint prosthesis socket |
DE3901885A1 (en) * | 1989-01-23 | 1990-08-02 | Werner Prof Dr Med Sattel | PAN FOR A JOINT OPROTHESIS |
-
1991
- 1991-08-24 DE DE9110508U patent/DE9110508U1/de not_active Expired - Lifetime
- 1991-08-24 DE DE4128259A patent/DE4128259A1/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4413038A1 (en) * | 1994-04-15 | 1995-10-19 | Alphanorm Medizintechnik Gmbh | Acetabular prosthesis |
DE10113614B4 (en) * | 2001-03-20 | 2004-01-29 | Eska Implants Gmbh & Co. | Set for creating an implant as a replacement for a destroyed pelvic bone socket |
Also Published As
Publication number | Publication date |
---|---|
DE9110508U1 (en) | 1991-10-31 |
DE4128259A1 (en) | 1993-03-04 |
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Owner name: AESCULAP AG & CO. KG, 78532 TUTTLINGEN, DE |
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