Apparatus and method for harvesting a bone-tendon-bone ligament graft
First Claim
1. A blade for peripheral attachment to a drive means for oscillating the blade about its axis for harvesting a substantially cylindrical bone plug comprising:
- a cylindrical body having an axis, a rigid cylindrical wall having a predetermined length along said axis, said wall situated at a first radius from said axis and having a longitudinally extending gap in said wall, said gap subtending a predetermined arcuate distance to form an open area extending radially outwardly from said axis, in a plane transverse to said axis, and extending longitudinally the extent of said predetermined length, and opposing, axially aligned edges along said cylindrical wall, said cylindrical body having, before attachment to the drive means, a predetermined open loop shape in a plane perpendicular to said axis;
a cutting means on at least one of said axially aligned edges of said cylindrical wall, said cutting means adapted to make an arcuate cut upon oscillation of said cylindrical body about said axis; and
a first and second mounting means extending a predetermined distance longitudinally along said cylindrical wall on each side of said gap and extending outwardly from said axis in a predetermined, fixed orientation relative to each other, said mounting mans for selectively securing said blade directly to the drive means and for maintaining said gap when said blade is in use, said first and second mounting means each having predetermined, outwardly extending portions thereof situated at radial distances greater than said first radius, said predetermined portions being non-contiguous and separated from each other, on opposite sides of said gap so as to leave a predetermined portion of said open area unoccupied by any part of said cylindrical wall or said first or second mounting means, thereby enabling said cylindrical wall to maintain said predetermined shape before and while said blade is peripherally attached to the drive means.
1 Assignment
0 Petitions
Accused Products
Abstract
A ring blade and drive system, and method of using same, for harvesting bone-tendon-bone ligament grafts having substantially cylindrical bone plugs. The ring blade disclosed is a circular ring having a predetermined arcuate gap formed in its periphery. The drive system includes a blade holder to peripherally hold the ring blade and a fixed-center oscillating mechanism to oscillate the ring blade about its axis within a predetermined arcuate range of motion. The ring blade structure enables the production of a substantially cylindrical bone plug of unlimited length. Harvesting of a bone-tendon-bone ligament graft is facilitated with the ring blade and method disclosed which enables the ring blade to be placed partially around a tendon segment to create bone plugs aligned with the tendon fibers included in the defined tendon segment. The cuts into the bone may be initiated into the bone at either end of the tendon segment from the tendon side through to the exterior of the bone to which the tendon is attached.
82 Citations
5 Claims
-
1. A blade for peripheral attachment to a drive means for oscillating the blade about its axis for harvesting a substantially cylindrical bone plug comprising:
-
a cylindrical body having an axis, a rigid cylindrical wall having a predetermined length along said axis, said wall situated at a first radius from said axis and having a longitudinally extending gap in said wall, said gap subtending a predetermined arcuate distance to form an open area extending radially outwardly from said axis, in a plane transverse to said axis, and extending longitudinally the extent of said predetermined length, and opposing, axially aligned edges along said cylindrical wall, said cylindrical body having, before attachment to the drive means, a predetermined open loop shape in a plane perpendicular to said axis; a cutting means on at least one of said axially aligned edges of said cylindrical wall, said cutting means adapted to make an arcuate cut upon oscillation of said cylindrical body about said axis; and a first and second mounting means extending a predetermined distance longitudinally along said cylindrical wall on each side of said gap and extending outwardly from said axis in a predetermined, fixed orientation relative to each other, said mounting mans for selectively securing said blade directly to the drive means and for maintaining said gap when said blade is in use, said first and second mounting means each having predetermined, outwardly extending portions thereof situated at radial distances greater than said first radius, said predetermined portions being non-contiguous and separated from each other, on opposite sides of said gap so as to leave a predetermined portion of said open area unoccupied by any part of said cylindrical wall or said first or second mounting means, thereby enabling said cylindrical wall to maintain said predetermined shape before and while said blade is peripherally attached to the drive means. - View Dependent Claims (2, 3, 4)
-
-
5. A system for harvesting a substantially cylindrical bone plug comprising, in combination, a blade and a drive means therefor, said blade adapted for peripheral attachment to the drive means and comprising:
-
a cylindrical body having an axis, a rigid cylindrical wall having a predetermined length along said axis, said wall situated at a first radius from said axis and having a longitudinally extending gap in said wall, said gap subtending a predetermined arcuate distance to form an open area extending radially outwardly from said axis, in a plane transverse to said axis, and extending longitudinally the extent of said predetermined length, and opposing, axially aligned edges along said cylindrical wall, said cylindrical body having, before attachment to the drive means, a predetermined open loop shape in a plane perpendicular to said axis; a cutting means on at least one of said axially aligned edges of said cylindrical wall, said cutting means adapted to make an arcuate cut upon oscillation of said cylindrical body about said axis; and a first and second mounting means extending a predetermined distance longitudinally along said cylindrical wall on each side of said gap and extending outwardly from said axis in a predetermined, fixed orientation relative to each other, said mounting mans for selectively securing said blade directly to the drive means and for maintaining said gap when said blade is in use, said first and second mounting means each having predetermined, outwardly extending portions thereof situated at radial distances greater than said first radius, said predetermined portions being non-contiguous and separated from each other, on opposite sides of said gap so as to leave a predetermined portion of said open area unoccupied by any part of said cylindrical wall or said first or second mounting means, thereby enabling said cylindrical wall to maintain said predetermined shape before and while said blade is peripherally attached to the drive means; and said drive means comprising; means for oscillating said blade about its axis; and means for accepting and maintaining said first and second mounting means in a spaced apart orientation while oscillating said cylindrical body about said axis, said means for accepting and maintaining comprising first and second receiving means, respectively, shaped complementarily with said first and second mounting means.
-
Specification