Method and apparatus for positioning and compacting bone graft
First Claim
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1. A method for preparing a cavity in a long bone for receiving a prosthesis having an elongated stem comprising:
- (a) forming an enlarged cavity extending from a distal end to a proximal end of said long bone;
(b) positioning a guide wire in said enlarged cavity, said guide wire extending from said distal end and out of said proximal end;
(c) positioning a dispenser containing bone graft material on said guide wire, said dispenser including an outlet and an elongated ejector member extending to an ejection end and having a passageway extending therethrough, said guide wire extending through said passageway and said outlet; and
(d) moving said ejector member on said guide wire toward said outlet and said distal end to eject bone graft material through said outlet and into said enlarged cavity.
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Abstract
A method and apparatus for introducing and compacting bone graft material in an enlarged femoral cavity including a dispenser having a barrel containing bone graft material and a cannulated ejector positionable over a guide wire for both ejecting bone graft material from the barrel and compacting the bone graft material while being guided on the guide wire.
188 Citations
10 Claims
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1. A method for preparing a cavity in a long bone for receiving a prosthesis having an elongated stem comprising:
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(a) forming an enlarged cavity extending from a distal end to a proximal end of said long bone; (b) positioning a guide wire in said enlarged cavity, said guide wire extending from said distal end and out of said proximal end; (c) positioning a dispenser containing bone graft material on said guide wire, said dispenser including an outlet and an elongated ejector member extending to an ejection end and having a passageway extending therethrough, said guide wire extending through said passageway and said outlet; and (d) moving said ejector member on said guide wire toward said outlet and said distal end to eject bone graft material through said outlet and into said enlarged cavity. - View Dependent Claims (2, 3, 4)
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5. Apparatus for dispensing bone graft material into an enlarged cavity of a long bone comprising:
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(a) a body extending along a first axis and having a chamber for containing bone graft material, said body having an annular wall encircling said first axis and an outlet in said annular wall; (b) a plunger positioned in said body for movement said first axis, said plunger having an enlarged head moveable from a position axially spaced from said outlet to a position closer to said outlet; (c) an ejector member extending along a second axis and having an ejection end and a passageway extending therethrough for receiving a guide wire, said ejector member being movable from a position at which said ejection end is positioned within said body to a position extending through said outlet to eject bone graft material therefrom; and (d) a guide wire positioned in said passageway. - View Dependent Claims (6, 7)
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8. Apparatus for dispensing bone graft material into an enlarged cavity of a long bone comprising:
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(a) a body extending along a first axis and having a chamber for containing bone graft material, said body having an annular wall encircling said first axis and an outlet in said annular wall; (b) a plunger positioned in said body for movement along said first axis, said plunger having an enlarged head moveable from a position axially spaced from said outlet to a position closer to said outlet; and (c) an ejector member extending along a second axis and having an ejection end, said ejector member being movable from a position at which said ejection end is positioned within said body to a position extending through said outlet to eject bone graft material therefrom. - View Dependent Claims (9, 10)
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Specification