The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2003
Filed:
Feb. 18, 1997
Björn Albrektsson, Onsala, SE;
Lars Carlsson, Kullavik, SE;
Magnus Jacobsson, Göteborg, SE;
Tord Röstlund, Kullavik, SE;
Stig Wennberg, Angered, SE;
Astra Aktiebolag, Sodertalje, SE;
Abstract
The invention relates to a fixture for insertion into and permanent anchorage in a cavity ( ) formed in bone tissue. The fixture is made of a fixture member ( ), which has an insertion end surface ( ) and a cylindrical peripheral surface ( ) provided with screw threads, and a plurality of circumferentially-spaced cutting recesses ( ), which are formed in a forward, self-tapping end portion ( ) of the threaded peripheral surface ( ) adjacent to the insertion end surface ( ) and which open axially into the insertion end surface ( ). A plurality of circumferentially-spaced tissue-collecting and tissue-distributing grooves ( ) are formed in a rear, non-self-tapping portion ( ) of the threaded peripheral surface ( ). The grooves ( ) open radially outwards and extend at least partially in the longitudinal direction of the fixture member ( ), and each groove ( ) is, at a forward end thereof, connected to one of the cutting recesses ( ) for collecting cut-off bone material (B) circumferentially around the inner wall of the cavity ( ) during the insertion of the fixture.