DE10143865A1 - Finger base joint implant comprising 2 monolithic components - Google Patents

Finger base joint implant comprising 2 monolithic components

Info

Publication number
DE10143865A1
DE10143865A1 DE2001143865 DE10143865A DE10143865A1 DE 10143865 A1 DE10143865 A1 DE 10143865A1 DE 2001143865 DE2001143865 DE 2001143865 DE 10143865 A DE10143865 A DE 10143865A DE 10143865 A1 DE10143865 A1 DE 10143865A1
Authority
DE
Germany
Prior art keywords
joint implant
base joint
finger
implant according
finger base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE2001143865
Other languages
German (de)
Inventor
Hans-Werner Bouman
Hans-Georg Pfaff
Gontran Sennwald
Markus Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ceramtec GmbH
Universitaet Heidelberg
Original Assignee
Ceramtec GmbH
Universitaet Heidelberg
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 Ceramtec GmbH, Universitaet Heidelberg filed Critical Ceramtec GmbH
Priority to DE2001143865 priority Critical patent/DE10143865A1/en
Priority to EP01122342A priority patent/EP1195150A1/en
Priority to US09/960,624 priority patent/US20020082705A1/en
Publication of DE10143865A1 publication Critical patent/DE10143865A1/en
Priority to US10/705,472 priority patent/US20040102853A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
    • A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
    • 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
    • A61F2/30767—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
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30153—Convex polygonal shapes rectangular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649—Ball-and-socket joints
    • A61F2002/30662—Ball-and-socket joints with rotation-limiting 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
    • 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
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
    • A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
    • A61F2002/4251—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers for metacarpo-phalangeal joints, i.e. MCP or MP joints, e.g. knuckle joints
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017—Angular shapes
    • A61F2230/0019—Angular shapes rectangular
    • 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
    • A61F2310/00185—Ceramics or ceramic-like structures based on metal oxides
    • A61F2310/00203—Ceramics or ceramic-like structures based on metal oxides containing alumina or aluminium oxide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Landscapes

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

Abstract

A finger base joint implant (1), made up of two monolithic components (2, 5), is new.

Description

Die Erfindung betrifft ein Fingergrundgelenksimplantat. The invention relates to a finger base joint implant.

Der Ersatz eines Fingergrundgelenks erfolgt nach dem Stand der Technik beispielsweise durch Interposition von Weichteilgewebe oder eines Abstandshalters aus einem Kunststoff, beispielsweise aus Silastik®. Am häufigsten wird ein Silikon- Spacer verwendet, der nur als Abstandshalter dient und keinen Gelenkersatz darstellt. Nach dessen Einsatz ist das Gelenk instabil und nur sehr eingeschränkt beweglich. Es kann zum vorzeitigen Abrieb des Werkstoffs und dadurch zu Osteolysen an den Knochenenden kommen. Bei Gelenkprothesen mit Metall-Metall-Gleitpaarung, insbesondere aber mit Metall-Polyethylen-Gleitpaarung, kann es durch den Abrieb des Werkstoffs zu Osteolysen an den Knochenenden kommen. Dadurch, dass die aus dem Stand der Technik bekannten Metall- oder Kunststoffgelenkprothesen in der Regel mehrteilig sind, kann es zur Lockerung der einzelnen Komponenten kommen, was die Lebensdauer des Implantats beeinträchtigt. Da die Fingergrundgelenksimplantate, die Fingergelenksendoprothesen, in der Regel gekoppelt sind, führt das häufig zur vorzeitigen Auslockerung des Gelenks. A finger base joint is replaced according to the state of the art for example by interposition of soft tissue or a spacer from a plastic, for example from Silastik®. The most common is a silicone Spacer used, which only serves as a spacer and is not a joint replacement. After its use, the joint is unstable and can only be moved to a very limited extent. This can lead to premature abrasion of the material and thus to osteolysis on the Bone ends come. For joint prostheses with metal-metal sliding pairing, but especially with metal-polyethylene sliding pairing, it can be caused by abrasion of the material come to osteolysis at the bone ends. By making that out the prior art known metal or plastic joint prostheses in the Are usually in several parts, there may be loosening of the individual components, which affects the life of the implant. Since the Finger joint implants, the finger joint endoprostheses, as a rule coupled, this often leads to premature loosening of the joint.

Aufgabe der vorliegenden Erfindung ist es, ein künstliches Fingergrundgelenk zu schaffen, das bei einer verschleißfreien Gleitpaarung eine anatomische Bewegung ermöglicht. Darüber hinaus sollen biologisch innerte Werkstoffe einen langzeitigen Gelenkersatz ermöglichen. The object of the present invention is to create an artificial finger joint create an anatomical movement with a wear-free sliding pairing allows. In addition, biologically inner materials should have a long-term Allow joint replacement.

Die Aufgabe wird gelöst durch ein ungekoppeltes, zweiteiliges Implantat mit kongruenten, sphärischen Gleitflächen. Es ist in den Fig. 1 bis 4 dargestellt. Die Fig. 1 zeigt eine perspektivische Ansicht. Das Fingergrundgelenksimplantat 1 besteht aus zwei monolithischen Komponenten, der proximalen Komponente 2, bestehend aus dem hohlkugelförmigen Pfannenlager 3 mit dem proximalen Schaft 4, sowie der distalen Komponente 5, bestehend aus einer in dem Pfannenlager 3gelagerten Kugel 6, die mittels des distalen Schafts 7 an den Fingerknochen implantiert ist. The task is solved by an uncoupled, two-part implant with congruent, spherical sliding surfaces. It is shown in FIGS. 1 to 4. Fig. 1 shows a perspective view. The basic finger joint implant 1 consists of two monolithic components, the proximal component 2 , consisting of the hollow spherical socket bearing 3 with the proximal shaft 4 , and the distal component 5 , consisting of a ball 6 mounted in the socket bearing 3 , which is attached by means of the distal shaft 7 is implanted in the finger bones.

Die Fig. 2 zeigt die proximale Ansicht. Die Fig. 3 zeigt eine Ansicht auf das sich in Beugestellung befindliche Implantat und die Fig. 4 einen Schnitt durch das Implantat in der Stellung nach Fig. 3 in der Seitenansicht. Fig. 2 shows the proximal view. FIG. 3 shows a view of the implant in the flexion position and FIG. 4 shows a section through the implant in the position according to FIG. 3 in a side view.

Wie aus der Fig. 4 ersichtlich ist, reicht die Lagerfläche 8 des Pfannenlagers 3 über die Äquatorialebene 9 hinaus und bietet dadurch einen großen Luxationsschutz, einen Schutz vor Verrenkungen des Fingergliedes. Bei vollständiger Streckung der Fingerglieder ist eine Abduktion/Adduktion von bis zu +/-30 Winkelgraden möglich. Die Adduktion wird durch eine bewegungsgerechte Aussparung 10 in der proximalen Komponente 2 gewährleistet. Bei zunehmender Flexion, das heißt bei zunehmender Beugung des Fingers, wird das Implantat so geführt, dass sowohl die Abduktion als auch die Adduktion zunehmend eingeschränkt wird. As can be seen from FIG. 4, the bearing surface 8 of the socket bearing 3 extends beyond the equatorial plane 9 and thus offers great protection against luxation, protection against dislocations of the phalanx. When the limbs are fully extended, an abduction / adduction of up to +/- 30 degrees is possible. The adduction is ensured by a movement-appropriate recess 10 in the proximal component 2 . With increasing flexion, i.e. with increasing flexion of the finger, the implant is guided in such a way that both abduction and adduction are increasingly restricted.

Die Vorteile des erfindungsgemäßen Implantats liegen darin, dass es vollständig aus Keramik, vorzugsweise aus Aluminiumoxid-Keramik besteht. Sowohl die proximalen als auch die distalen Implantationskomponenten sind jeweils monolithisch. Durch die Form der Prothese wird eine gute Beweglichkeit bei anatomischer seitlicher Führung ermöglicht. Die Form der Lagerung sowie das Material selbst gewährleisten eine hohen Abriebfestigkeit und damit eine langjährige Haltbarkeit. Die Implantation erfolgt zementfrei. Dazu weisen der proximale Schaft 4 und der distale Schaft 7 eine das Knocheneinwachsen, die Osteointegration, fördernde Beschichtung auf, beispielsweise Hydroxylapatit. Die Schäfte können auch eine Struktur aufweisen, die porös ist und damit das Einwachsen des Knochengewebes begünstigt. The advantages of the implant according to the invention are that it consists entirely of ceramic, preferably of aluminum oxide ceramic. Both the proximal and distal implant components are monolithic. The shape of the prosthesis enables good mobility with anatomical lateral guidance. The shape of the storage and the material itself ensure high abrasion resistance and thus long-term durability. The implantation is carried out without cement. For this purpose, the proximal shaft 4 and the distal shaft 7 have a coating which promotes bone ingrowth, osteointegration, for example hydroxylapatite. The stems can also have a structure that is porous and thus promotes ingrowth of the bone tissue.

Aufgrund ihrer Form ist die erfindungsgemäße Prothese besonders zum Ersatz zerstörter und instabiler Fingergrundgelenke, insbesondere bei Rheumatikern, geeignet. Because of its shape, the prosthesis according to the invention is particularly suitable for replacement destroyed and unstable finger joints, especially in rheumatics, suitable.

Claims (11)

1. Fingergrundgelenksimplantat, dadurch gekennzeichnet, dass das Implantat (1) ungekoppelt und zweiteilig ist. 1. Finger base joint implant, characterized in that the implant ( 1 ) is uncoupled and in two parts. 2. Fingergrundgelenksimplantat nach Anspruch 1, dadurch gekennzeichnet, dass das Implantat (1) aus zwei monolithischen Komponenten zusammengesetzt ist, der proximalen Komponente (2), bestehend aus dem hohlkugelförmigen Pfannenlager (3) mit dem proximalen Schaft (4), sowie der distalen Komponente (5), bestehend aus einer in dem Pfannenlager (3) gelagerten Kugel (6), die mittels des distalen Schafts (7) an den Fingerknochen implantiert ist. 2. Finger base joint implant according to claim 1, characterized in that the implant ( 1 ) is composed of two monolithic components, the proximal component ( 2 ), consisting of the hollow spherical socket bearing ( 3 ) with the proximal shaft ( 4 ), and the distal component ( 5 ), consisting of a ball ( 6 ) mounted in the socket bearing ( 3 ), which is implanted on the finger bones by means of the distal shaft ( 7 ). 3. Fingergrundgelenksimplantat nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Implantat (1) kongruente, sphärische Gleitflächen aufweist, von denen die eine das hohlkugelförmige Pfannenlager (3) und die andere die Oberfläche der Kugel (6) ist. 3. Finger base joint implant according to claim 1 or 2, characterized in that the implant ( 1 ) has congruent, spherical sliding surfaces, one of which is the hollow spherical socket bearing ( 3 ) and the other the surface of the ball ( 6 ). 4. Fingergrundgelenksimplantat nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Lagerfläche (8) des Pfannenlagers (3) als Luxationsschutz über die Äquatorialebene (9) hinausreicht. 4. Finger base joint implant according to one of claims 1 to 3, characterized in that the bearing surface ( 8 ) of the socket bearing ( 3 ) extends beyond the equatorial plane ( 9 ) as protection against luxation. 5. Fingergrundgelenksimplantat nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass eine Adduktion durch eine bewegungsgerechte Aussparung (10) in der proximalen Komponente (2) gewährleistet ist und bei vollständiger Streckung der Fingerglieder eine Abduktion/Adduktion von bis zu +/-30 Winkelgraden möglich ist. 5. Finger base joint implant according to one of claims 1 to 4, characterized in that adduction is ensured by a movement-appropriate recess ( 10 ) in the proximal component ( 2 ) and, when the limbs are fully extended, an abduction / adduction of up to +/- 30 Degrees are possible. 6. Fingergrundgelenksimplantat nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass bei zunehmender Flexion, das heißt bei zunehmender Beugung des Fingers, die Führung des distalen Schaftes (7) so gestaltet ist, dass sowohl die Abduktion als auch die Adduktion zunehmend eingeschränkt ist. 6. Finger joint implant according to one of claims 1 to 5, characterized in that with increasing flexion, that is, with increasing flexion of the finger, the guidance of the distal shaft ( 7 ) is designed such that both the abduction and the adduction is increasingly restricted , 7. Fingergrundgelenksimplantat nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass es vollständig aus Keramik besteht. 7. Finger base joint implant according to one of claims 1 to 6, characterized characterized that it is made entirely of ceramic. 8. Fingergrundgelenksimplantat nach Anspruch 7, dadurch gekennzeichnet, dass es vollständig aus Aluminiumoxid-Keramik besteht. 8. Finger base joint implant according to claim 7, characterized in that it is made entirely of alumina ceramic. 9. Fingergrundgelenksimplantat nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der proximale Schaft (4) und der distale Schaft (7) eine das Knocheneinwachsen, die Osteointegration, fördernde Beschichtung aufweisen. 9. Basic finger joint implant according to one of claims 1 to 8, characterized in that the proximal shaft ( 4 ) and the distal shaft ( 7 ) have a bone ingrowth, osteointegration, promoting coating. 10. Fingergrundgelenksimplantat nach Anspruch 9, dadurch gekennzeichnet, dass die das Knocheneinwachsen fördernde Beschichtung Hydroxylapatit ist. 10. Finger base joint implant according to claim 9, characterized in that the bone ingrowth promoting coating is hydroxyapatite. 11. Fingergrundgelenksimplantat nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der proximale Schaft (4) und der distale Schaft (7) eine das Knocheneinwachsen, die Osteointegration, fördernde poröse Struktur aufweisen. 11. Finger base joint implant according to one of claims 1 to 8, characterized in that the proximal shaft ( 4 ) and the distal shaft ( 7 ) have a bone ingrowth, osteointegration, promoting porous structure.
DE2001143865 2000-09-22 2001-09-07 Finger base joint implant comprising 2 monolithic components Withdrawn DE10143865A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE2001143865 DE10143865A1 (en) 2001-09-07 2001-09-07 Finger base joint implant comprising 2 monolithic components
EP01122342A EP1195150A1 (en) 2000-09-22 2001-09-19 Finger joint implant
US09/960,624 US20020082705A1 (en) 2000-09-22 2001-09-21 Basal finger joint implant
US10/705,472 US20040102853A1 (en) 2000-09-22 2003-11-10 Basal finger joint implant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2001143865 DE10143865A1 (en) 2001-09-07 2001-09-07 Finger base joint implant comprising 2 monolithic components

Publications (1)

Publication Number Publication Date
DE10143865A1 true DE10143865A1 (en) 2003-03-27

Family

ID=7698029

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2001143865 Withdrawn DE10143865A1 (en) 2000-09-22 2001-09-07 Finger base joint implant comprising 2 monolithic components

Country Status (1)

Country Link
DE (1) DE10143865A1 (en)

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