DE19629847A1 - Hüftgelenksendoprothese mit nachträglich entriegelbarem, zweiteiligen Schaft - Google Patents
Hüftgelenksendoprothese mit nachträglich entriegelbarem, zweiteiligen SchaftInfo
- Publication number
- DE19629847A1 DE19629847A1 DE19629847A DE19629847A DE19629847A1 DE 19629847 A1 DE19629847 A1 DE 19629847A1 DE 19629847 A DE19629847 A DE 19629847A DE 19629847 A DE19629847 A DE 19629847A DE 19629847 A1 DE19629847 A1 DE 19629847A1
- Authority
- DE
- Germany
- Prior art keywords
- prosthesis
- joint
- endoprosthesis according
- hip joint
- ball joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
-
- 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
- A61F2/3662—Femoral shafts
- A61F2/3672—Intermediate parts of shafts
-
- 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
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
- A61F2/367—Proximal or metaphyseal parts of shafts
-
- 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
- A61F2/3662—Femoral shafts
- A61F2/3676—Distal or diaphyseal parts of shafts
-
- 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
- A61F2002/30378—Spherically-shaped protrusion and recess
-
- 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
- A61F2002/30492—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking pin
-
- 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
- A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30589—Sealing means
-
- 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
- A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
- A61F2002/30668—Means for transferring electromagnetic energy to implants
-
- 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
- A61F2002/3625—Necks
-
- 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
- A61F2/3662—Femoral shafts
- A61F2/3672—Intermediate parts of shafts
- A61F2002/3674—Connections of proximal parts to distal parts
-
- 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
- A61F2/3662—Femoral shafts
- A61F2002/3678—Geometrical features
- A61F2002/3694—Geometrical features with longitudinal bores
-
- 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
- A61F2002/4619—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 for extraction
-
- 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
- A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
- A61F2002/4641—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis for disconnecting
-
- 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
-
- 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
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0001—Means for transferring electromagnetic energy to implants
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Prostheses (AREA)
Description
Gelenkendoprothesen ersetzen durch degenerative
entzündliche, traumatische oder tumoröse Ver
änderungen geschädigte Gelenke und ermöglichen es
dem Patienten so, ein weitgehend "normales" Leben zu
führen.
Es ist bekannt, daß das ideale Gelenkimplantat eine
physiologische, proximal-metaphysäre Lastübertragung in
das tragende Knochenlager ermöglichen sollte. Für eine
ausreichende Fixierung, insbesondere zur Primär
verankerung von zementfreien Implantaten, besitzen die
üblichen Implantate vor allem im Hüftbereich einen weit
in den Markraum des tragenden Knochens hinein
reichenden Prothesenstiel.
Es ist weiterhin bekannt, daß durch die herkömmlichen
langstieligen Prothesen die geforderte physiologische
Lasteinleitung derart geändert wird, daß anstelle der
proximal-metaphysären die distal-diaphysäre Kraftein
leitung begünstigt wird. Durch diese Kraftumleitung in
den distalen Bereich des tragenden Knochens (Femur)
entsteht eine mechanische Schonung des Knochens im
proximalen Bereich, das "Stress-Shielding". Die Folge ist
die oft zu beobachtende Resorption des Knochens im
proximalen Bereich, vor allem des Kalkar
(Kalkaratrophie). Zusätzlich kommt es distal im Bereich
der Stielspitze zu einer verstärkten Krafteinleitung mit
resultierender Kortikalishypertrophie. Diese Mecha
nismen führen zur Lockerung der Prothese im
Knochenlager und somit zum Versagen des Implantates.
Es ist weiterhin bekannt, daß der Knochen
substanzverlust im Falle einer Wechseloperation die
Fixation der Wechselprothese erheblich erschwert und
häufig die Verwendung von teuren Sonderimplantaten
erfordert.
Der im Patentanspruch angegebenen Erfindung liegt
das Problem zugrunde, die Vielzahl der
operationstechnisch komplizierten, teuren und für den
Patienten belastenden lockerungsbedingten Pro
thesenwechseloperationen zu minimieren.
Dieses Problem wird durch die im Patentanspruch
aufgeführten Merkmale gelöst.
Die mit der Erfindung erzielten Vorteile bestehen darin,
daß dieser Prothesentyp unmittelbar postoperativ durch
seinen langen Stiel eine ausreichende, den heutigen
Prothesenvarianten entsprechende Primärstabilität ge
währleistet. Nach Ablauf der ersten postoperativen
Phase kann der Arzt entsprechend der Situation des
Implantates durch die Entriegelung eines im
Prothesenschaft angeordneten Kugelgelenkes manuell
eine mechanische Entkoppelung des distalen Stielteiles
vom proximalen Stielteil herbeiführen, die eine mech.
Entlastung des distalen Stielteiles zur Folge hat.
Dadurch wird in der Folgezeit das knöcherne
Einwachsen des proximalen Stielteiles gefördert. Dieser
Prozeß führt dann zu einer ausschließlich proximalen
Verankerung und somit zu einer physiologischen
Lasteinleitung in das Knochenlager. Die aseptische
Implantatlockerung, die durch mechanisch bedingte
Knochenresorptionsvorgänge ausgelöst wird, kann
somit vermieden werden. So wird eine deutlich erhöhte
Standzeit der Prothese möglich.
Im Falle einer aus anderen Gründen trotzdem
notwendigen Wechseloperation wird durch den Erhalt
der proximalen Knochensubstanz eine solide Ausgangs
position für die Fixation der Wechselprothese
geschaffen.
Die hier beschriebene Funktion dieser neuen Hüft
endoprothese wird durch einen minimalinvasiven Eingriff
in das das Hüftgelenk umgebende Gewebe erreicht.
Dies ist von entscheidender Bedeutung, da mit der
Größe des Eingriffs das Risiko einer Infektion enorm
ansteigt.
Ein Ausführungsbeispiel der Erfindung ist in der
Zeichnung dargestellt und wird im folgenden näher
beschrieben.
Es zeigt
Fig. 1 einen Schnitt (Aufbruch) durch die erfindungs
gemäße Endoprothese.
Die Prothese besteht aus einem oberen Teil (1) und
einem unteren Teil (2). Diese Teile sind so geformt, daß
sie die artikulierenden Komponenten eines
Kugelgelenkes bilden. Dieses Kugelgelenk ist durch
einen arretierten Bolzen (3), der in einer
Führungsbohrung im oberen Prothesenteil (1)
angeordnet ist, blockiert. Am oberen Prothesenteil (1) ist
im lateralen Bereich der Prothese (außen) eine flexible
Führung (4) angeschlossen. In dieser Führung ist eine
Biegewelle (5) angeordnet, mit der durch Drehen der
Bolzen (3) aus dem Kugelgelenk bewegt wird und so
das Gelenk freigibt.
Claims (8)
1. Hüftgelenkendoprothese, dadurch gekennzeichnet, daß der obere Stielteil (i)
und der untere Stielteil (2) mittels eines durch einen Bolzen (3) arretierbaren
Gelenkes verbunden sind, derart, daß dieses Gelenk durch einen von proximal
(oben) zugänglichen Mechanismus (4) entriegelt wird.
2. Endoprothese nach Anspruch 1, dadurch
gekennzeichnet, daß der obere Teil (1) auf
seiner Außenfläche eine osteoinduktive
Beschichtung trägt.
3. Endoprothese nach einem der
vorstehenden Ansprüche, dadurch
gekennzeichnet, daß der obere Teil (1) eine
Bohrung zur Aufnahme eines chirurgischen
Werkzeuges aufweist.
4. Endoprothese nach einem der
vorstehenden Ansprüche, dadurch
gekennzeichnet, daß der obere Teil (1) einen
Kragen zur Auflage auf der
Knochenresektionsfläche aufweist.
5. Endoprothese nach einem der
vorstehenden Ansprüche, dadurch
gekennzeichnet, daß die Position des
Gelenkes bezüglich des Abstandes von der
Stielspitze des unteren Teiles (2) variiert
werden kann.
6. Endoprothese nach einem der
vorstehenden Ansprüche, dadurch
gekennzeichnet, daß der Entriegelungs
mechanismus telemetrisch (induktiv) erfolgt.
7. Endoprothese nach Anspruch 1, dadurch
gekennzeichnet, daß der untere Teil (2) auf
seiner Außenfläche eine osteoinduktive
Beschichtung trägt.
8. Endoprothese nach Anspruch 1, dadurch
gekennzeichnet, daß der untere Teil (2) auf
seiner Außenfläche polierbearbeitet ist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19629847A DE19629847A1 (de) | 1996-07-24 | 1996-07-24 | Hüftgelenksendoprothese mit nachträglich entriegelbarem, zweiteiligen Schaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19629847A DE19629847A1 (de) | 1996-07-24 | 1996-07-24 | Hüftgelenksendoprothese mit nachträglich entriegelbarem, zweiteiligen Schaft |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19629847A1 true DE19629847A1 (de) | 1998-02-05 |
Family
ID=7800693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19629847A Withdrawn DE19629847A1 (de) | 1996-07-24 | 1996-07-24 | Hüftgelenksendoprothese mit nachträglich entriegelbarem, zweiteiligen Schaft |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19629847A1 (de) |
-
1996
- 1996-07-24 DE DE19629847A patent/DE19629847A1/de not_active Withdrawn
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Taylor et al. | Fatigue failure of cancellous bone: a possible cause of implant migration and loosening | |
JP3325889B2 (ja) | 特に股関節用の体内人工関節 | |
EP1175877B1 (de) | Modulare Revisionsprothese | |
DE102004043700A1 (de) | Endoprothese für ein Metatarsophalangealgelenk | |
CA2229382A1 (en) | Bone prosthesis fixation device and methods of using same | |
DE19619093A1 (de) | Marknagelsystem zur Verwendung bei allen menschlichen und tierischen Knochen zur Frakturheilung bzw. Knochenverlängerung | |
WO1990002533A2 (de) | Hüftgelenksprothese und ihre verwendung | |
WO2006084426A2 (de) | Hüftgelenk-endoprothesensystem | |
EP0844855B1 (de) | Endoprothese, insbesondere hüftgelenkprothese | |
EP0404716A1 (de) | Verankerungsschaft für eine Femurkopfprothese | |
WO1994008534A1 (de) | Stiel einer femurkomponente einer hüftgelenksendoprothese | |
CH702348B1 (de) | Navigationseinrichtung zur visuellen Auswahl und Positionierung. | |
DE102005019546A1 (de) | Haltbarer Hüftendoprothesenschaft zur Implantation beim Menschen | |
DE19629847A1 (de) | Hüftgelenksendoprothese mit nachträglich entriegelbarem, zweiteiligen Schaft | |
EP1446076B1 (de) | Schenkelhalsendoprothese für ein künstliches hüftgelenk | |
DE19529988C1 (de) | Hüftgelenkprothese mit bioresorbierbarem Mittelteil | |
AT502137A1 (de) | Hüftgelenksrevisionseinrichtung | |
DE19530531C2 (de) | Hüftgelenksendoprothese mit bioresorbierbarem, axial gestütztem Mittelteil | |
WO2008154762A1 (de) | Verankerungselement für endoprothesen in röhrenknochen | |
EP1559383A2 (de) | Set zur Erstellung eines transkutanen Implantates | |
EP3714841B1 (de) | Kurzschaftprothese | |
DE19725773A1 (de) | Hüftgelenkendoprothese mit veränderlichem Stieldurchmesser | |
AT518711B1 (de) | Schaft für eine Hüftgelenksprothese | |
DE102004051492B3 (de) | Femurkomponente für eine Hüfttotalendoprothese | |
DE19925829A1 (de) | Verfahren zur dynamischen metaphysären Krafteinleitung bei Femurkomponenten in der Hüftgelenksendoprothetik |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licences declared | ||
8139 | Disposal/non-payment of the annual fee |