Patents by Inventor Per I. Branemark

Per I. Branemark has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4330891
    Abstract: In an element for implantation in body tissue, particularly bone tissue, consisting of a biologically flawless material with a micro-pitted surface, the pores in the surface have a diameter many times smaller than has been previously known in order to permit the occurrence of such a tight and extensive boundary zone around the implanted element that this achieves reinforced and inextricable anchoring in the tissue. The pore diameter may be as little as about 10 nm and as large as a few multiples of the normal diameter of the cells in the tissue, preferably no larger than the cell diameter, i.e. about 1000 nm. Optimal results are obtained with pore diameters equal to or smaller than about 300 nm and a finely pored rutile layer has been found to give a particularly strong and durable joint with the growing tissue. Preferably at least one deposit of an agent facilitating and/or accelerating the growing-together process is arranged on or in the element.
    Type: Grant
    Filed: February 28, 1980
    Date of Patent: May 25, 1982
    Inventors: Per I. Branemark, Bo Thuresson af Ekenstam
  • Patent number: 4261350
    Abstract: A support member for a prosthesis comprises a tubular member adapted to be secured to a prepared bone by a cement or by screw fastener. The face of the prosthesis in contact with the bone is provided with channels, typically of trapezoidal section to ensure a good supply of blood to the bone tissue and to facilitate blood vessel and bone tissue growth. A device to expand such a support member is disclosed.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: April 14, 1981
    Inventors: Per I. Branemark, Bo Thuresson af Ekenstam