DE2724041C3 - Verbindung von Implantat-Teilen bei Verbund-Endoprothesen - Google Patents
Verbindung von Implantat-Teilen bei Verbund-EndoprothesenInfo
- Publication number
- DE2724041C3 DE2724041C3 DE2724041A DE2724041A DE2724041C3 DE 2724041 C3 DE2724041 C3 DE 2724041C3 DE 2724041 A DE2724041 A DE 2724041A DE 2724041 A DE2724041 A DE 2724041A DE 2724041 C3 DE2724041 C3 DE 2724041C3
- Authority
- DE
- Germany
- Prior art keywords
- plastic
- implant parts
- intermediate cavity
- columns
- composite
- 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
Links
- 239000007943 implant Substances 0.000 title claims description 10
- 239000002131 composite material Substances 0.000 title claims description 4
- 239000004033 plastic Substances 0.000 claims description 21
- 229920003023 plastic Polymers 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000010137 moulding (plastic) Methods 0.000 claims description 4
- 239000002905 metal composite material Substances 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 241000309551 Arthraxon hispidus Species 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 210000004394 hip joint Anatomy 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000003462 bioceramic Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000002296 pyrolytic carbon Substances 0.000 description 2
- 206010011469 Crying Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 102000015933 Rim-like Human genes 0.000 description 1
- 108050004199 Rim-like Proteins 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Classifications
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- 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
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0018—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
-
- 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
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0019—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in hardness, e.g. Vickers, Shore, Brinell
-
- 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
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0026—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in surface 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
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or 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
- A61F2310/00161—Carbon; Graphite
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/10—Details of socket shapes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/20—Connections with hook-like parts gripping behind a blind side of an element to be connected
- F16B2200/205—Connections with hook-like parts gripping behind a blind side of an element to be connected the hook being a separate retainer
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Die Erfindung betrifft eine Verbindung von Implantat-Teilen bei Verbund-Endiyprothesen, die aus Werkstoffen mit unterschiedlichen mecha: ischen Eigenschaften bestehen und durch einen in den zwischen den
Implantat-Teilen gebildeten Zwischenhohlraum eingepaßten Kunststoff-Formkörper vor unmittelbarem
gegenseitigen Kontakt geschützt sind.
Derartige unterschiedliche Werkstoff-Eigenschaften,
die bei direkten Kontakten der Werkstoffe zu erhöhtem Verschleiß oder anderen, bei Implantaten oder Endo-Prothesen nicht tolerierbaren Abnutzungserscheinungen führen können, sind beispielsweise unterschiedliche
Härten, Ausdehnungskoeffizienten, Oberflächenbeschaffenheiten und/oder elastische Eigenschaften.
Um einen direkten Kontakt solcher Werkstoffe — wie z.B. biokeramische Stoffe oder pyrolytischer
Kohlenstoff auf der einen Seite und Metalle bzw. Metall-Legierungen auf der anderen Seite — zu
vermeiden, ist es bekannt, diese Werkstoffe durch
Kunststoff-Zwischenkörper - beispielsweise aus dem in der Implantattechnik vielfach benutzten Polyäthylen
— zu trennea Bei einer ersten bekannten Konstruktion (CH-PS 5 33 982) ist ein kugelförmiger Abschnitt eines
Hüftgelenkkopfes aus Kohlenstoff mittels einer elastomeren Zwischenschicht auf einem hervorstehenden
Zapfen eines metallischen Hüftgelenks gelagert, wobei die Zwischenschicht durch eine nicht näher beschriebene Abdichtung gegen Körperflüssigkeiten geschützt
wird. Wie man aus der Zeichnung (Fig. 5 des genannten
Patents) schließen kann, besteht die Abdichtung aus einem Metallring, der in direktem Kontakt mit dem
pyrolitischen Kohlenstoff der Oberfläche des Abschnitts steht; damit sind aber die eingangs erwähnten, nicht
tolerierbaren Abnützungserscheinungen zwischen diesen beiden Werkstoffen — wenn auch nur in einer
relativ Weinen Berührungsfläche — gegeben.
Be» einer bekannten Hüftgelenkpfanne (CH-PS
5 68 753), die als Verbundprothese ausgebildet ist. ist
eine kalottenförmige Gelenkfläche aus Keramik vorbanden, die durch eine Kunststoffummantelung von
einem metallischen Pfannenteil getrennt ist
Es hat sich nun gezeigt, daß eine derartige Kunststoff-Ummantelung unter Belastung zum Kaltfließen neigt und aus dem offenen Zwischenraum zwischen
der Gelenkfläche und dem Pfannenteil ausfließt; im Laufe der Zeit kommt es so auch hier zu direkten
Kontakten zwischen den nicht miteinander verträglichen Werkstoffen. Aufgabe der Erfindung ist es, dieses
plastische Kaltfließen möglichst weitgehend zu unterbinden und dadurch auch bei langzeitigen Belastungen
(!erartige Kontakte zu verhindern.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst,
daß der Zwischenhohlraum durch die gegenseitige Formgebung der zu verbindenden Implantat-Teile an
seinen äußeren Bereichen zu Spalten verengt ist, und daß der Kunststoff-Formkörper in diesen Spalten
dünnwandige Verlängerungen aufweist
Durch die Verengung des Zwischenhohlraums zwischen den Implantat-Teilen aus den bei direktem
Kontakt miteinander unverträglichen Werkstoffen an den äußeren Bereichen ihrer Verbindungen zu engen
Spalten und die dünnwandigen Verlängerungen des Kunststoff-Formkörpers wird ein plastisches Kaltfließen des Kunststoffes verhindert, weil sich seine
Verlängerungen in diesen Spalten vor allem elastisch verformen, bei Rückgang der Belastungen in Längsrichtung der Spalten also wieder ihre ursprüngliche Form
annehmen.
pers und ebenfalls der Verlängerungen sowie sein
werden, wenn die Grenzfläche des Zwischenhohlraums
zu mindestens einem der Werkstoffe teilweise konisch
in Richtung der den Kunststoff-Formkörper belasten-
den Scherkräfte verläuft Weiterhin ergeben sich relativ
kurze Baulängen, wenn der Obergang zu den Spalten
unstetig über einen vorspringenden Ansatz erfolgt
Besonders bevorzugt ist die Anwendung der neuartigen Verbindung auf Keramik/Metall-Verbundprothesen. Die Spaltbreiten des Zwischenhohlraumes und die
Dicken der Verlängerungen des Kunststoff-Fonnkörpers werden in Abhängigkeit von den Eigenschaften des
Kohlenstoffes gewählt; Auswahlkriterium ist dabei, daß die Verformungen der Verlängerungen bei Belastungen
in Spaltrichtung weitgehend elastisch bleiben.
Im folgenden wird die Erfindung anhand von Ausführungsbeispielen im Zusammenhang mit den
Zeichnungen näher erläutert
Kig.l zeigt im Längsschnitt die Verbindung eines
Keramik-Gelenkkopfes einer Hüftgelenkprothese, der mittels eines Zapfens mit einem metallischen Schaft
verbunden ist;
Fig.2 ist ein Schnitt durch den zwischen diesem
Gelenkkopf und dem Zapfen des Schaftes eingepaßten Kunststoff-Formkörpers in unbelastetem Zustand
z. B. auch für die Fixierung des Gelenkkopfes auf dem
Fig.4 schließlich ist ein Schnitt durch den zur
Verbindung nach Fig.3 gehörigen Kunststoff-Formkörperjn unbelastetem Zustand.
Ein Zapfen 1 eines nicht weiter dargestellten, aus Metall bestehenden Schaftes einer Hüftgelenk-Prothese
trägt einen aus Biokeramik gefertigten Gelenkkopf 2, Der Gelenkkopf 2 ist auf dem Zapfen 1 mit Hilfe einer
ebenfalls aus Metall hergestellten Verankerungsschraube 3 befestigt.
Wie geschildert ist es notwendig, einen direkten Kontakt zwischen Gelenkkopf 2 und den Metallelementen
1 und 3 zu verhindern. Zwischen dem Gelenkkopf 2 und dem Zapfen i ist daher ein kappenartiger,
kreiszylindrischer Kunststoff-Formkörper 4 eingepaßt, dessen Form in unbelastetem Zustand F i g. 2 zeigt
Für den Durchtritt der Schraube 3 hat der
Kunststoff-Formkörper 4 eine öffnung 5. Weiterhin läuft er an seinem in Richtung der Belastung und der
Relativbewegung zwischen dem Zapfen 1 und dem Gelenkkopf 2 freien Ende erfindungsgemäß in einer
dünnwandigen Verlängerung 6 aus. Die Verlängerung 6 greift in eine Spalte 7 ein, die auf Grund eines
verbreiterten Absatzes 9 des Zapfens t zwischen diesem und dem montierten Gelenkkopf 2 entsteht. Die Spalte 7
schließt einen Zwischenhohlraum 8 für einen Kunststoff-Formkörper 4 in Richtung parallel zur Zapfoaachse
— welches auch die bevorzugte Richtung für die Relativbewegung des Gelenkkopfes 2 auf dem Zapfen 1
und für die auf den Kunststoff-Formkörper 4 wirkenden Scherkräfte ist — nach unten ab. Wie bereits erwähnt,
bewirkt diese Ausbildung des Kunststoff-Formkörpers 4 und des Zwischenhohlraums 8, daß der Kunststoff-Formkörper
4 und vor allem seine Verlängerung 6 sich bei Relativbewegungen der miteinander verbundenen
Teile 1 und 2 elastisch verformen; so wird ein plastisches Fließen des Kunststoffes, das im Laufe der Zeit zu
direkten Berührungen der Elemente i und 2 führen kann, verhindert
Durch eine randartige Verbreiterung 10 des Kopfes der Schraube 3 (F i g. 3) wird bei dem zweiten gezeigten
Beispiel der Zwischenhohlraum 11, der bei eingesetzter Schraube 3 in der für sie vorgesehenen Bohrung 12 des
ίο Gelenkkopfes 2 entsteht, nach oben mit einer engen
Spalte 13 abgeschlossen. Sein unterer Abschluß verengt sich durch die mit einer konischen Anschrägung 14
versehene Verengung 15 der Bohrung 12 zu einer weiteren, im wesentlichen in Achsrichtung der Schraube
3 und damit wiederum in der bevorzugten Bewegungsrichtung der Relativbewegung der Elemente 2 und 3
gelegenen Spalte 16.
In den Spalten 13 und 16 sowie in dem Zwischenhohlraum 11 ist ein rotationssymmetrischer Kunststoff-Formkörper
17 mit seinen dünnwandigen oberen und unteren Verlängerungen 18 und 19 (F i g 4) eingepaßt
Bei diesem Beispiel sind die Grenzflächen 20 und 21 zwischen den Kunststoff-Formkörper 17 und den
Elementen 2 bzw. 3 wenigstens über einen Teil ihrer Länge konisch ausgebildet, damit das Einpassen und die
elastische Verformung des Kunststoff-Formkörpers 17 bei Belastungen und Belastungsänderungen, die im
wesentlichen in Richtung der Schraubenachse erfolgen, erleichtert werden.
Hierzu 2 Blatt Zeichnungen
Claims (4)
1. Verbindung von Implantat-Teilen bei Verbund-Endoprothesen, die aus Werkstoffen mit unterschiedlichen mechanischen Eigenschaften bestehen
und durch einen in den zwischen den Implantat-Teilen gebildeten Zwischenhohlraum eingepaßten
Kunststoff-Formkörper vor unmittelbarem gegenseitigen Kontakt geschützt sind, dadurch gekennzeichnet, daß der Zwischenhohlraum (8,
11) durch die gegenseitige Formgebung der zu verbindenden Implantat-Teile (1,2; 2,3) an seinen
äußeren Bereichen zu Spalten (7; 13,16) verengt ist,
und daß der Kunststoff-Forrakörper (4,17) in diesen
Spalten (7; 13,16) dünnwandige Verlängerungen (6; 18,19) aufweist
2. Verbindung nach Anspruch 1, dadurch gekennzeichnet, daß die Grenzfläche (20,21) des Zwischenhohlraums (8, 11) zu mindestens einem der
Werkstoffe teilweise konisch in Richtung der den Kunststoff-f^rmkörper (4; 17) belasteten Scherkräfte verläuft
3. Verbindung nach Anspruch 1, dadurch gekennzeichnet, daß der Obergang zu den Spalten (7; 13,
16) unstetig über einen vorspringenden Ansatz (9; 10,15) erfolgt
4. Anwendung der Verbindung nach einem der Ansprüche 1 bis 3 auf eine Keramik-Metall-Verbundprothese.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH631077A CH612586A5 (de) | 1977-05-23 | 1977-05-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2724041A1 DE2724041A1 (de) | 1978-11-30 |
DE2724041B2 DE2724041B2 (de) | 1979-03-22 |
DE2724041C3 true DE2724041C3 (de) | 1983-02-17 |
Family
ID=4307521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2724041A Expired DE2724041C3 (de) | 1977-05-23 | 1977-05-27 | Verbindung von Implantat-Teilen bei Verbund-Endoprothesen |
Country Status (9)
Country | Link |
---|---|
US (1) | US4227265A (de) |
JP (1) | JPS53146499A (de) |
AT (1) | AT351155B (de) |
CA (1) | CA1099053A (de) |
CH (1) | CH612586A5 (de) |
DE (1) | DE2724041C3 (de) |
FR (1) | FR2391711A1 (de) |
GB (1) | GB1593819A (de) |
NL (1) | NL171017C (de) |
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DE3802213A1 (de) * | 1988-01-26 | 1989-07-27 | Roland Man Druckmasch | Gelenkprothese fuer ein hueft- oder kniegelenk |
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GB8415265D0 (en) * | 1984-06-15 | 1984-07-18 | Ici Plc | Device |
FR2580170B1 (fr) * | 1985-04-12 | 1987-11-27 | Meta Ceram | Tete femorale pour prothese de hanche |
CH668703A5 (de) * | 1985-04-15 | 1989-01-31 | Sulzer Ag | Verbindung zweier implantat-teile. |
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US5370700A (en) * | 1993-02-19 | 1994-12-06 | Sarkisian; James S. | Prosthetic knee joint |
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CA2226239A1 (en) * | 1997-01-17 | 1998-07-17 | Ceramtec Ag | Fixation of a ceramic structural member by way of gliding component in a femoral part |
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US6711755B2 (en) * | 2002-03-28 | 2004-03-30 | Depuy Products, Inc. | Prosthetic device having a polyaryletherketone component with enhanced wettability and a method for making the same |
US7160329B2 (en) | 2004-12-01 | 2007-01-09 | Mayo Foundation For Medical Research And Education | Radial-capitellar implant |
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FR2315568A1 (fr) * | 1975-06-25 | 1977-01-21 | Vape Sa Ets | Dispositif de fixation a vis dans un element de construction en matiere agglomeree |
DE2646478C2 (de) | 1976-10-14 | 1982-06-09 | Rosenthal Technik Ag, 8672 Selb | Gelenk-Endoprothese |
-
1977
- 1977-05-23 CH CH631077A patent/CH612586A5/xx not_active IP Right Cessation
- 1977-05-27 DE DE2724041A patent/DE2724041C3/de not_active Expired
-
1978
- 1978-03-22 JP JP3182578A patent/JPS53146499A/ja active Pending
- 1978-04-06 AT AT243078A patent/AT351155B/de not_active IP Right Cessation
- 1978-05-17 NL NLAANVRAGE7805319,A patent/NL171017C/xx not_active IP Right Cessation
- 1978-05-19 CA CA303,752A patent/CA1099053A/en not_active Expired
- 1978-05-19 GB GB20762/78A patent/GB1593819A/en not_active Expired
- 1978-05-22 FR FR7815126A patent/FR2391711A1/fr active Granted
- 1978-05-23 US US05/908,688 patent/US4227265A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3802213A1 (de) * | 1988-01-26 | 1989-07-27 | Roland Man Druckmasch | Gelenkprothese fuer ein hueft- oder kniegelenk |
Also Published As
Publication number | Publication date |
---|---|
CH612586A5 (de) | 1979-08-15 |
NL171017C (nl) | 1983-02-01 |
AT351155B (de) | 1979-07-10 |
GB1593819A (en) | 1981-07-22 |
JPS53146499A (en) | 1978-12-20 |
ATA243078A (de) | 1978-12-15 |
FR2391711B3 (de) | 1981-01-23 |
NL7805319A (nl) | 1978-11-27 |
DE2724041B2 (de) | 1979-03-22 |
CA1099053A (en) | 1981-04-14 |
NL171017B (nl) | 1982-09-01 |
DE2724041A1 (de) | 1978-11-30 |
FR2391711A1 (fr) | 1978-12-22 |
US4227265A (en) | 1980-10-14 |
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