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
  • A61F2/28—Bones
  • A61F2/2846—Support means for bone substitute or for bone graft implants, e.g. membranes or plates for covering bone defects
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
  • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
  • A61C8/0031—Juxtaosseous implants, i.e. implants lying over the outer surface of the jaw bone
• • 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
  • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
  • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
  • A61B17/86—Pins or screws or threaded wires; nuts therefor
• • 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
  • A61F2/30721—Accessories
  • A61F2/30724—Spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity
• • 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
  • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
  • A61F2002/3006—Properties of materials and coating materials
  • A61F2002/30062—(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• • 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
  • A61F2002/30199—Three-dimensional shapes
  • A61F2002/30224—Three-dimensional shapes cylindrical
  • A61F2002/30235—Three-dimensional shapes cylindrical tubular, e.g. sleeves
• • 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
  • A61F2002/30199—Three-dimensional shapes
  • A61F2002/30242—Three-dimensional shapes spherical
  • A61F2002/30245—Partial spheres
• • 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
  • A61F2002/30574—Special structural features of bone or joint prostheses not otherwise provided for with an integral complete or partial collar or flange
• • 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
  • A61F2002/30316—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
  • A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
• • 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
  • A61F2002/30772—Apertures or holes, e.g. of circular cross section
• • 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
  • A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
  • A61F2210/0004—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof bioabsorbable
• • 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
  • A61F2230/0063—Three-dimensional shapes
  • A61F2230/0069—Three-dimensional shapes cylindrical
• • 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
  • A61F2230/0063—Three-dimensional shapes
  • A61F2230/0071—Three-dimensional shapes spherical
• • 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
  • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Definitions

• the invention relates to method and device for osseous tissue growth.
• osseous tissue is uncovered by excising a flap of soft tissue over the site where the osseous tissue growth shall take place.
• a domed spacer is located at said site, and the flap is put back over the spacer which maintains a cavity between the flap and the osseous tissue .
• the device of the invention comprises a shape per ⁇ manent domed spacer to be located over the uncovered portion of the osseous tissue in order to define said cavity over the surface of the osseous tissue.
• O-A1-91/14404 discloses method and device for osseous tissue growth of the kind referred to above.
• the spacer comprises a semi-spherical or truncated semi-spherical calot having a rounded base edge.
• the calot is perforated and is made of a tissue compatible and inert material, preferably titanium, but it can also be made of a ceramic material, steel, plastics, or hydroxyl apatite.
• the calot has a central opening and is attached by means of a screw which passes through the central opening and is screwed into a fixture implanted into the osseous tissue, after a portion of osseous tissue having been uncovered by excising a flap of soft tissue and periosteum.
• the calot is engaged at the base edge with the uncovered osseous tissue and then is covered by the flap. It is the intention that the cavity maintained around the implanted fixture betweeen the calot and the uncovered osseous tissue shall be filled with fresh osseous tissue, but in practice it has been found that there will not be obtained a complete filling of this cavity with osseous tissue. On the contrary there is obtained in said cavity growth of osseous tissue as well as connective tissue.
• DE-A1 42 23 153 discloses an implant for fastening a tooth prosthesis in the yaw.
• This device comprises a frame forming a latticed structure which is attached to the sur ⁇ face of uncovered osseous tissue by pointed pins on the frame being driven into the osseous tissue.
• the frame is covered by a membrane of porous polytetrafluoroethylene or another equivalent material, and this membrane engages at the outer peripheral portion thereof the surface of the uncovered osseous tissue.
• the frame comprises a central portion with a threaded bore therein for the attachment of a threaded elemen .
• the frame and the membrane located over the frame is covered by soft tissue.
• O-A1-94/03121 discloses a surgical element and a method for selective tissue regeneration wherein a cavity in the osseous tissue is covered by a shape permanent element which tightly engages the surface of the osseous tissue around the cavity.
• the element is covered by soft tissue, and in the cavity thus separated from the soft tissue an osseous tissue growth takes place in order to fill the cavity.
• the tight engagement at the periphery of the element is provided in order to prevent connective tissue from growing in between the membrane and the surface of the osseous tissue, which could jeopardize the osseous tissue growth in the cavity.
• the purpose of the present invention is to provide method and device of the kind referred to above in order to produce osseous tissue growth on an osseous tissue surface without infiltration of soft tissue, and for this purpose method and device of the invention have obtained the characterizing features of claim 1 and claim 7, respectively.
• FIG. 1 is a vertical cross sectional view of a domed spacer of a presently preferred embodiment
• FIG. 2 is a vertical cross-sectional view of the spacer in FIG. 1 in implanted condition
• FIG. 3 is a vertical cross-sectional view of the domed spacer of another embodiment
• the spacer disclosed in FIG. 1 comprises a spherically curved calot 10 and a cylindrical base portion 11.
• a radially projecting circumferential flange 12 is provided on said base portion spaced above the base edge thereof.
• the spacer should be made of a tissue compatible material, and a suitable material is titanium. However, the material may also be a resorbable material such as ali ⁇ phatic polyester.
• the spacer should be shape permanent, which in the present case means that it can but must not be rigid; it can be of such nature that the shape thereof can be changed and that the spacer then maintains the shape imparted to it for the time required for the osseous tissue to grow under the spacer and to fill out the cavity defined by it.
• the spacer should be non-perforated in order to form an impermeable barrier but it is also pos ⁇ sible to have a spacer which is at least partly perforated the perforation being dimensioned to allow cells from surrounding tissue to grow through the spacer but only with some delay. It is not necessary that the spacer is symme- trical around the axis thereof; it can also have oval or elongated shape but for working the method of the invention as it now will be described by using the spacer according to Fig. 1 the spacer should be symmetrical about the axis thereof as described. When the method of the invention is applied, FIG.
• a flap 13 is excised, comprising periosteum and connective tissue, from osseous tissue 14 so that the surface 15 thereof is uncovered.
• a circular groove 16 is made in the surface of the osseous tissue said groove being dimensioned such that the cylindrical base portion 11 can be received therein with flange 12 engaging the surface of the osseous tissue as disclosed in Fig. 2.
• the spacer can have tight fit in the groove to be kept in place and to sealingly engage one or the other side surface of the groove.
• a sealing element can be provided between flange 12 and the osseous tissue surface 15. In this connection it is essential that the spacer has a completely tight fit against the osseous tissue surface 15.
• a spacer according to FIG. 1 made of titanium and having an inner diameter of 4.5 mm and an inner height of 3.0 mm was mounted to the skull bone by forming a 0.6 mm circular groove therein by means of a trephine cutter having an inner diameter of 5.0 mm.
• the spacer was fitted at the base portion 11 thereof into the groove with tight fit therein due to the different inner diameters of the trephine cutter and base portion 11. Due to the tight engagement between the inside of the base portion and the inner bonding wall of the groove the spacer was reliably fixed on the skull bone and then, the flap was put back over the spacer and sutured to surrounding soft tissue.
• the spacer used in the experiment accounted for above was completely sealed it has been found that the osseous tissue growth can be further stimulated and thus considerably accelerated by calot 10 being perforated at least partly.
• such perforation must be dimensioned in such way that nutrition flow through the perforation is allowed, growth of cells from soft tissue at the same time being retarded.
• the spacer comprising a spherically curved calot 10' is provided with a gasket 18 of soft material e.g.
• a screw 19 is passed through a central opening in the spacer the head of said screw being countersunk in the spacer, and by screwing this screw into the osseous tissue the spacer can be attached to the osseous tissue with gasket 18 pressed tightly against the surface of the osseous tissue.

Landscapes

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

Applications Claiming Priority (3)

Publications (1)

Family

ID=20395736

Family Applications (1)

Country Status (4)

Families Citing this family (5)

Family Cites Families (4)

• 1994
  • 1994-10-25 SE SE9403650A patent/SE503400C2/sv not_active IP Right Cessation
• 1995
  • 1995-10-24 EP EP95936178A patent/EP0790808A1/en not_active Withdrawn
  • 1995-10-24 WO PCT/SE1995/001259 patent/WO1996012446A1/en not_active Application Discontinuation
  • 1995-10-24 AU AU38215/95A patent/AU3821595A/en not_active Abandoned

Non-Patent Citations (1)

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