CH580958A5 - Hip joint prosthesis using electro-stimulation - has cement between ball and stem, and negative connection to stem with plate and screws - Google Patents

Hip joint prosthesis using electro-stimulation - has cement between ball and stem, and negative connection to stem with plate and screws

Info

Publication number
CH580958A5
CH580958A5 CH1149874A CH1149874A CH580958A5 CH 580958 A5 CH580958 A5 CH 580958A5 CH 1149874 A CH1149874 A CH 1149874A CH 1149874 A CH1149874 A CH 1149874A CH 580958 A5 CH580958 A5 CH 580958A5
Authority
CH
Switzerland
Prior art keywords
stem
ball
shaft part
hip joint
screws
Prior art date
Application number
CH1149874A
Other languages
German (de)
Original Assignee
Ivanov Michael
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 Ivanov Michael filed Critical Ivanov Michael
Priority to CH1149874A priority Critical patent/CH580958A5/en
Publication of CH580958A5 publication Critical patent/CH580958A5/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/20—Applying electric currents by contact electrodes continuous direct currents
    • A61N1/205—Applying electric currents by contact electrodes continuous direct currents for promoting a biological process
    • 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
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/02—Details
    • A61N1/04—Electrodes
    • A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
    • 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
    • A61F2/28—Bones
    • A61F2002/2821—Bone stimulation by electromagnetic fields or electric current for enhancing ossification
    • 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
    • A61F2002/30448—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using adhesives
    • A61F2002/30449—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using adhesives the adhesive being cement
    • 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
    • A61F2002/30904—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
    • 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
    • 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
    • A61F2002/365—Connections of heads to 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
    • 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
    • A61F2220/005—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using adhesives
    • 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
    • A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Radiology & Medical Imaging (AREA)
  • Molecular Biology (AREA)
  • Cardiology (AREA)
  • Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Medical Informatics (AREA)
  • Prostheses (AREA)

Abstract

The hip joint prosthesis which is assisted by electro stimulation by means of a positive connection (7) on the ball portion and a negative connection (6) near the femur (4) has a ball joint consisting of a spherical headed portion (1) and a stem portion (2) the latter being inserted down the femur, with a gap between the inside of the spherical part and the spigot (8) on the top of the stem part, which is filled with a cement (3), the two parts being made of a cobalt/nickel/chromium/molybedenum alloy. The negative connection is made on a plate (5) through a pair of screws (5a) passing through it, in contact with the stem (2).

Description

  

  
 



   Die Erfindung betrifft eine neue zweiteilige Hüftgelenk Endoprothese, die dadurch gekennzeichnet ist, dass sie durch Elektrostimulation eine permanente Verbindung mit dem Femurknochen eingeht.



   Die bis jetzt bekannten Hüftgelenkprothesen, die verschiedene Formen   aufweisen,    wirkten nur biomechanisch.



   Zweck der Erfindung ist, neben einer rein biomechanischen Wirkung durch Elektrostimulation die Festigkeit und Zähigkeit der Verbindung der Prothese mit dem Knochen dauernd zu erhalten.



   In der Zeichnung ist eine Ausführungsform der erfindungsgemässen Prothese dargestellt.



   Wenn man den Zwischenraum   zwischen    dem Zapfen 8 und der Gelenkkugel 1 mit elektrisch isolierendem Knochenzement ausfüllt, kann man durch Anschluss der Gelenkkugel 1 an den positiven Pol (die Anode) einer Gleichstromquelle und des Schaftteiles 2 an den negativen Pol (die Kathode) der Gleichstromquelle einen elektrischen Strom mit einer Stromstärke von 50 mA in den ersten 24 Stunden und von 15 bis 20 mA in den nächsten 20 Tagen, d. h. mit Stromstärken im rein physiologischen Bereich, fliessen lassen. Dadurch wird auf der Oberfläche der Prothese durch Elektrophorese langsam ein Knochenbelag gebildet. Da die Oberfläche der Prothese uneben oder rauh ausgebildet ist, ergibt sich durch die Ober   flächenvergrösserung    eine bessere Verankerung im Knochen.



   Im Falle einer Osteoporose des elektrophoretisch gebildeten Knochens (z. B. bei Diabetik-Acidosis) kann die Elektrostimulation des Schaftteiles der Prothese wiederholt werden.



  Dadurch kann eine Restabilisierung der Prothese ohne operativen Eingriff erreicht werden. Im Falle eines Prothesenwechsels auf Grund von Brechen oder Amortisation der Prothese ist ein erneutes Verbinden des Schaftteils der Prothese, diesmal aber mit dem positiven Pol der Gleichstromquelle, not   wendig. Dadurch wird eine Enveichung des elektrophoretisch    gebildeten Knochens bewirkt und der Prothesenwechsel erleichtert.



   Beide Teile der Prothese sind aus einem Stahl gefertigt, der der schweizerischen Norm für chirurgische Implantate (SNV 129) entspricht. 



  
 



   The invention relates to a new two-part hip joint endoprosthesis, which is characterized in that it forms a permanent connection with the femur bone through electrical stimulation.



   The hip joint prostheses known up to now, which have different shapes, only worked biomechanically.



   The purpose of the invention is, in addition to a purely biomechanical effect by means of electrical stimulation, to permanently maintain the strength and toughness of the connection between the prosthesis and the bone.



   The drawing shows an embodiment of the prosthesis according to the invention.



   If you fill the space between the pin 8 and the joint ball 1 with electrically insulating bone cement, you can connect the joint ball 1 to the positive pole (the anode) of a direct current source and the shaft part 2 to the negative pole (the cathode) of the direct current source electrical current with a current strength of 50 mA in the first 24 hours and from 15 to 20 mA in the next 20 days, i.e. H. let flow with currents in the purely physiological range. As a result, a bone coating is slowly formed on the surface of the prosthesis by electrophoresis. Since the surface of the prosthesis is uneven or rough, the surface enlargement results in better anchoring in the bone.



   In the case of osteoporosis of the electrophoretically formed bone (e.g. in the case of diabetic acidosis), the electrostimulation of the shaft part of the prosthesis can be repeated.



  In this way, the prosthesis can be restabilized without surgery. In the event of a replacement of the prosthesis due to breakage or amortization of the prosthesis, it is necessary to reconnect the shaft part of the prosthesis, this time to the positive pole of the direct current source. This causes the electrophoretically formed bone to soften and the replacement of the prosthesis is made easier.



   Both parts of the prosthesis are made of a steel that complies with the Swiss standard for surgical implants (SNV 129).

Claims (1)

PATENTANSPRUCH PATENT CLAIM Zweiteilige Hüftgelenk-Endoprothese, bestehend aus einem in den Femur (4) einsetzbaren Schaftteil und einer Gelenkkugel, dadurch gekennzeichnet, dass die Gelenkkugel (1) und der Schaftteil (2) aus Metall bestehen, dass der Querschnitt eines in eine Ausnehmung der Gelenkkugel einsetzbaren Zapfens (8) am Schaftteil (2) kleiner ist als der Querschnitt der Ausnehmung der Gelenkkugel (1), so dass ein mit elektrisch isolierendem Knochenzement (3) ausfüllbarer Zwischenraum zwischen dem Zapfen (8) und der Gelenkkugel (1) vorhanden ist, und dass die Gelenkkugel (1) und der Schaftteil (2) mit Mitteln (5, 5a, 6, 7) zum Anschluss an die Pole einer Gleichstromquelle versehen sind. Two-part hip joint endoprosthesis, consisting of a shaft part that can be inserted into the femur (4) and a joint ball, characterized in that the joint ball (1) and the shaft part (2) are made of metal, that the cross-section of a pin that can be inserted into a recess in the joint ball (8) on the shaft part (2) is smaller than the cross section of the recess of the joint ball (1), so that there is an intermediate space between the pin (8) and the joint ball (1) that can be filled with electrically insulating bone cement (3), and that the joint ball (1) and the shaft part (2) are provided with means (5, 5a, 6, 7) for connection to the poles of a direct current source. UNTERANSPRÜCHE 1. Hüftgelenk-Endoprothese nach Patentanspruch, dadurch gekennzeichnet, dass die Gelenkkugel (1) und der Schaftteil (2) aus mit Kobalt, Nickel, Chrom und Molybdän legiertem Metall bestehen. SUBCLAIMS 1. Hip joint endoprosthesis according to claim, characterized in that the joint ball (1) and the shaft part (2) consist of metal alloyed with cobalt, nickel, chromium and molybdenum. 2. Hüftgelenk-Endoprothese nach Patentanspruch oder Unteranspruch 1, dadurch gekennzeichnet, dass die Mittel zum Anschluss des Schaftteils (2) aus einer mit dem Schaftteil durch Schrauben (5a) verbundenen Platte (5) bestehen. 2. Hip joint endoprosthesis according to claim or dependent claim 1, characterized in that the means for connecting the shaft part (2) consist of a plate (5) connected to the shaft part by screws (5a).
CH1149874A 1974-08-23 1974-08-23 Hip joint prosthesis using electro-stimulation - has cement between ball and stem, and negative connection to stem with plate and screws CH580958A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH1149874A CH580958A5 (en) 1974-08-23 1974-08-23 Hip joint prosthesis using electro-stimulation - has cement between ball and stem, and negative connection to stem with plate and screws

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1149874A CH580958A5 (en) 1974-08-23 1974-08-23 Hip joint prosthesis using electro-stimulation - has cement between ball and stem, and negative connection to stem with plate and screws

Publications (1)

Publication Number Publication Date
CH580958A5 true CH580958A5 (en) 1976-10-29

Family

ID=4374068

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1149874A CH580958A5 (en) 1974-08-23 1974-08-23 Hip joint prosthesis using electro-stimulation - has cement between ball and stem, and negative connection to stem with plate and screws

Country Status (1)

Country Link
CH (1) CH580958A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610514A1 (en) * 1987-02-06 1988-08-12 Cuilleron J Joint prothesis with a ceramic linkage and another material, as well as the method for manufacturing such a process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610514A1 (en) * 1987-02-06 1988-08-12 Cuilleron J Joint prothesis with a ceramic linkage and another material, as well as the method for manufacturing such a process

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