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:
Jul. 21, 1998
Filed:
Mar. 07, 1995
Rickey D Hart, Plainville, MA (US);
F Alan Barber, Frisco, TX (US);
James C Chow, Mount Vernon, IL (US);
Innovasive Devices, Inc., Marlborough, MA (US);
Abstract
A bone plug removal tool is described. The tool includes a cylindrical cutting element having an external surface and having an internal surface defining an internal bore extending along a longitudinal axis of the cutting element from a proximal end to a distal end. A cutting tooth is located at the proximal end of the cutting element and extends into the internal bore. A replaceable outer cylindrical sheath is arranged concentrically around the external surface of the cylindrical cutting element. A bone plug emplacement tool to be used in conjunction the removal tool is also disclosed. The emplacement tool includes a cylindrical element having an internal surface defining an internal bore extending along a longitudinal axis of the element from a proximal end. The internal surface further defines an internal step adjacent a distal end of the element. A stem is disposed for co-axial movement within the element, the stem having a proximal end disposed within the internal bore. A shoulder is defined in the stem for mating engagement with the internal distal step of the element in order to limit distal movement of the stem within the internal bore. A kit incorporating the various tools is disclosed. The kit, for repair of an articular cartilage, includes the bone plug removal tool of the invention, an elongated plunger for insertion into the proximal end of the cutting element and for coaxial movement within it, the plunger for displacing a bone plug from the distal end of cutting element and the bone emplacement tool of the invention. Kits may also include a drill bit containing a depth stop. A method of repairing a defective articular cartilage is also described.