Nautilus glenoid reamer
AssigneeArthrex, Inc.
InventorGregory A. Guederian
Life of this patent
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Abstract
Apparatus and methods for preparing a bone socket, such as the glenoid of the scapula, to receive a prosthetic component. The apparatus is an orthopedic instrument (reamer) used for the preparation of bone surface for the insertion of an implant. The reamer includes an elongate shaft, a connecting system (for example, a quick connect system), and a cutting head having a specific configuration, i.e., in the shape of a Nautilus shell having a logarithmic spiral. The cutting head is provided with a plurality of spokes that have different radii or lengths (that confer a non-constant non-uniform radius to the overall cutting head).
Claims12
A bone reamer, comprising:
- a shaft with a longitudinal axis, a proximal end and a distal end;
- and
- a cutting head provided at the distal end of the shaft, the cutting head having a configuration of half a hemisphere and having a shape of a shell having a logarithmic spiral, the cutting head being provided with a plurality of spokes configured to cut bone by extending radially away from the shaft to a continuous base of the cutting head the base connecting distal regions of all of the plurality of spokes, and in a direction perpendicular to the longitudinal axis of the shaft, wherein each of the plurality of spokes has a radius defined as the length of the spoke between the longitudinal axis of the shaft and the base of the cutting head wherein the radius of each of the plurality of spokes is different from the radius of an adjacent spoke, and wherein the longitudinal axis of the shaft is radially offset from the base of the cutting head.
Dependencies are inferred from the claim text.