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
  • A61F2/08—Muscles; Tendons; Ligaments
  • A61F2/0811—Fixation devices for tendons or ligaments
• • 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
  • A61F2/08—Muscles; Tendons; Ligaments
  • A61F2/0811—Fixation devices for tendons or ligaments
  • A61F2002/0817—Structure of the anchor
  • A61F2002/0823—Modular anchors comprising a plurality of separate parts
  • A61F2002/0829—Modular anchors comprising a plurality of separate parts without deformation of anchor parts, e.g. fixation screws on bone surface, extending barbs, cams, butterflies, spring-loaded pins
• • 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
  • A61F2/08—Muscles; Tendons; Ligaments
  • A61F2/0811—Fixation devices for tendons or ligaments
  • A61F2002/0847—Mode of fixation of anchor to tendon or ligament
  • A61F2002/0858—Fixation of tendon or ligament between anchor and bone, e.g. interference screws, wedges
• • 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
  • A61F2/08—Muscles; Tendons; Ligaments
  • A61F2/0811—Fixation devices for tendons or ligaments
  • A61F2002/0876—Position of anchor in respect to the bone
  • A61F2002/0882—Anchor in or on top of a bone tunnel, i.e. a hole running through the entire bone

Definitions

• the invention relates to a device for in vivo fastening of a cruciate ligament replacement or for fastening the replacement of other ligaments, the end of the cruciate ligament replacement emerging from a drilling channel in the bone and being held on the bone surface.
• the operative replacement for the cruciate ligament, e.g. B. the human knee joint is usually done with a method in which the cruciate ligament is pulled between the two rolling mounds of the femur and mechanically attached laterally above one of the rolling mounds or on the tibia.
• U-clamps, serrated screws or bone pieces bolted into the drill channel serve as fastening means for the ends of the cruciate ligament on the bone parts (Walter Blauth, "Orthopedic surgical surgery on the knee", G. Thieme Verlag, 1986, No. 156-158).
• the object of the invention is to provide the device of the e. G. Type in such a way that the cruciate ligament replacement to achieve long-term strength in the prosthetic sense is mainly fixed by static friction and a minimization of the relative movements between the ligament and the bone can be achieved.
• the relative movement between the ligament replacement and the bone drilling channel is minimized with the proposal according to the invention, for which the plugging effect of the anchor shaft or neck makes a considerable contribution.
• This type of attachment promotes the ingrowth of the cruciate ligament replacement by suppressing its transverse contractions. This means that the cruciate ligament is more resistant to anxiety.
• a (metallic) cruciate ligament anchor 1 and its attachment to a bone It consists of a shaft 2 and an anchor base 3, which are aligned at an angle ⁇ to one another.
• the angle ⁇ depends on the location of the attachment to the bone 4 (see FIG. 3) and can be smaller / larger than 90 °.
• the shaft 2 is circular-cylindrical, so that it can be fitted into the drilling channel 5 (see FIG. 3)
• the anchor base 3 is formed by a flattened piece.
• the kink zone (angle ⁇ ) is located in the transition zone between shaft 2 and anchor foot 3.
• the shaft 2 is formed at its free end 6 into a head by means of a notch 7.
• the bone 4 can grow into this notch 7.
• the dimensions of the shaft 2 correspond to the requirements for cruciate ligament replacement 8 or the replacement for other ligaments and drilling channel 5 (see FIG. 3).
• FIG. 2 is provided with a bore 10 through its free end 9, through which a fastening plate 11 (FIG. 3) can be guided. It serves to hold both the cruciate ligament replacement 8 and the cruciate ligament anchor 1 on the bone 4, for. B. the tibia.
• This type of attachment is shown in Fig. 3, seen from the side.
• the drilling channel 5, which emerges on the surface 12, is drilled through the tibia 4.
• the cruciate ligament replacement 8 is laid in this drill channel 5. However, its end 13 protrudes beyond the surface 12 and is pressed against the surface 12 by the anchor foot 3 by means of the surface 14 facing the bone 4 (angle corresponds to the surface curvature).
• end 13 is bent around the free end 9 of the anchor foot 3 to the surface 15 facing away from the bone 4 by means of a 180.degree. attached to both the anchor foot 3 and the bone 4. This type of attachment causes enormous static friction between the cruciate ligament replacement 8 and the anchor foot 3.
• the physiological ligament loading F B accordingly pulls the cruciate ligament anchor 1, in particular the shaft 2, into the drilling channel 5. This leads to a pressure on the bone areas in the kink zone of the cruciate ligament anchor 1. The adhesion between cruciate ligament replacement 8 and bone 4 is increased.
• a screw / clamp arrangement is also conceivable as a fastening means for the free end 13 of the cruciate ligament replacement 8.
• FIG. 4 Another type of design of the cruciate ligament anchor 1 is shown in FIG. 4.
• the design features of the shaft 2 and the anchor base 3 are in principle the same as those described in FIGS. 1-3. Only its method of attachment to bone 4 or that of cruciate ligament replacement 8 with its free end to bone 4 differs. Instead of screws or screw / clamp arrangements, tooth rows 16 (claw teeth) are arranged on the surface 14 of the anchor foot 3 facing the bone 4 at least on one side, which are hammered into the bone 4 and thus the hardening of both the cruciate ligament replacement 8 and the Effect cruciate ligament anchor 1.

Landscapes

• Health & Medical Sciences (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Rehabilitation Therapy (AREA)
• Rheumatology (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)
• Surgical Instruments (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6324917

Family Applications (1)

Country Status (4)

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Citations (3)

Family Cites Families (1)

• 1987
  • 1987-04-04 DE DE19873711465 patent/DE3711465A1/de active Granted
• 1988
  • 1988-03-31 EP EP19880902803 patent/EP0357623A1/de not_active Withdrawn
  • 1988-03-31 JP JP63502814A patent/JPH02502069A/ja active Pending
  • 1988-03-31 WO PCT/DE1988/000207 patent/WO1988007844A1/de not_active Ceased

Patent Citations (3)

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