Bone plug inserting system
First Claim
Patent Images
1. A device for plugging the medullary canal comprising the combination of:
- (a) a means for plugging the medullary canal made of a biologically compatible material, and wherein said plugging means has a proximal and a distal end and is round in cross-section and tapered from a larger diameter at the proximal end of the plug to a smaller diameter at the distal end of the plug, and wherein the proximal portion of the plugging means has tooth-like steps in which the diameter decreases in a series of steps, each perpendicular to the length of the plugging means and then tapering back out toward the distal end and approaching the original diameter, but with the outer diameter of each successive step being slightly less in diameter than the previous step as the steps progress from the proximal end toward the distal end of the plugging means, and wherein each step is a continuous ring about the plug, and;
(b) a means for inserting the plugging means into the canal; and
(c) a means associated with said plugging means and inserting means for engaging and disengaging the plugging means from the inserting means.
0 Assignments
0 Petitions
Accused Products
Abstract
A device for plugging the medullary canal in joint replacement surgery which prevents the cement used for fixation from extending beyond that point where it is useful and which also creates a closed space to facilitate more complete cement filling of the femoral canal or other boney cavities is disclosed. The device is comprised of a tapered cylindrical plug which is threadedly engaged to a long flexible shaft capable of being inserted into the medullary canal. The shaft is disengaged from the plug after the plug is lodged at the appropriate place in the canal. The plug is made of a bio-compatible material.
128 Citations
9 Claims
-
1. A device for plugging the medullary canal comprising the combination of:
-
(a) a means for plugging the medullary canal made of a biologically compatible material, and wherein said plugging means has a proximal and a distal end and is round in cross-section and tapered from a larger diameter at the proximal end of the plug to a smaller diameter at the distal end of the plug, and wherein the proximal portion of the plugging means has tooth-like steps in which the diameter decreases in a series of steps, each perpendicular to the length of the plugging means and then tapering back out toward the distal end and approaching the original diameter, but with the outer diameter of each successive step being slightly less in diameter than the previous step as the steps progress from the proximal end toward the distal end of the plugging means, and wherein each step is a continuous ring about the plug, and; (b) a means for inserting the plugging means into the canal; and (c) a means associated with said plugging means and inserting means for engaging and disengaging the plugging means from the inserting means. - View Dependent Claims (2, 3, 4)
-
- 5. A plug for the medullary canal, wherein said plug has a proximal and distal end which is tapered from a larger diameter at the proximal end of the plug to a smaller diameter at the distal end of the plug, and wherein the proximal portion of the plug has tooth-like steps in which the diameter decreases in a series of steps, each perpendicular to the length of the plug and then tapering back out toward the distal end and approaching the original diameter, but with the outer diameter of each successive step being slightly less in diameter than the previous step as the steps progress from the proximal end toward the distal end of the plug, and wherein each step is a continuous ring about the plug.
Specification