Guide bushing for coring reamer, storage package for reamer assembly, and method of use
First Claim
1. In a coring reamer including a cylindrical body with a cylindrical passageway extending therethrough, the improvement comprising a guide bushing having a passage extending longitudinally therethrough, said passage being sized to slidably receive a guide pin therethrough, said guide bushing having an external surface tapered from a larger diameter at one end thereof to a smaller diameter at another end thereof, said larger diameter being equal to or less than a diameter of said passageway, whereby said one end of said bushing engages an inner wall of said passageway with a line contact.
2 Assignments
0 Petitions
Accused Products
Abstract
A guide bushing for a coring reamer having a tapered member with its largest diameter at its first end so that the guide bushing frictionally engages an internal surface of the reamer with a line contact. The guide bushing has a passage sized to slidably receive a guide pin. In use, the bushing advances in the proximal direction within the coring reamer along a guide pin while the excavated bone enters the passageway through the reamer. A storage package specifically designed for the reamer assembly is employed to remove the excavated bone from within the reamer. The package has a closed distal end and an open proximal end closeable with a cap. With the coring reamer received in cantilevered fashion through a central opening of the cap of the tube, and with an adapter that couples the coring reamer to a handpiece installed, a wrench is placed over the adapter and turned while the user grips peripheral surfaces of the cap to prevent rotation of the coring reamer. A plunger is inserted through the opening through the coring reamer from the proximal end and is pushed through the reamer until the bone core and bushing fall out of the distal end of the coring reamer.
148 Citations
13 Claims
- 1. In a coring reamer including a cylindrical body with a cylindrical passageway extending therethrough, the improvement comprising a guide bushing having a passage extending longitudinally therethrough, said passage being sized to slidably receive a guide pin therethrough, said guide bushing having an external surface tapered from a larger diameter at one end thereof to a smaller diameter at another end thereof, said larger diameter being equal to or less than a diameter of said passageway, whereby said one end of said bushing engages an inner wall of said passageway with a line contact.
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7. A method of performing surgery including the steps of:
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a) driving a guide pin into bone tissue;
b) sliding a bushing over said guide pin, said bushing having a passage extending therethrough and an external surface tapered from a smaller diameter at a first end thereof to a larger diameter at a second end thereof;
c) sliding a coring reamer over said bushing, said coring reamer having a cylindrical body with a cylindrical passageway extending therethrough and adapted to engage said second end of said bushing;
d) rotating and advancing said coring reamer to cut a bone tunnel while said coring reamer is guided on said guide pin by said bushing. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification