Punch system for tibial prosthesis
AssigneeJohnson & Johnson Professional, Inc.
InventorsSarah Anne Wildgoose, Ernest Quintanilha, Diana F. McCue
Life of this patent
Estimating the term…
Abstract
A punch system is provided for preparing a keel cavity in a tibial bone for implantation of a prosthesis. The system provides a modular punch system providing a logical step-to-step approach to cutting, punching, and/or forming the tibial bone. The system of a preferred embodiment includes a quick release punch guide for attaching to a tibial tray trial component of a surgical instrument system for implanting artificial knees, and a universal quick release handle for attaching or detaching a punch from a handle or slap hammer.
Claims20
A punch system for preparing a tibial bone for a prosthetic implant, said punch system comprising:
- a tray trial for performing a trial reduction in a knee replacement surgery, said tray trial having a proximal end with a circumferential rim, an opening for receiving a punch and a mating portion for coupling with a punch guide;
- and
- a punch guide comprising:
- a handle portion;
- a guiding portion coupled to the handle portion, said guiding portion including an opening for receiving a punch;
- and
- a locking mechanism comprising:
- a coupling portion for engaging with said mating portion of said tray trial;
- a quick release for disengaging said coupling portion from said mating portion, said quick release further comprising a spring-loaded release button having a coupling position and a release position, said button being slidable from said coupling position to said release position and being biased towards said coupling position;
- wherein said opening in said tibial tray is substantially aligned with said opening in said guide portion of said punch guide when said coupling portion is engaged with said mating portion to permit the insertion of a punch through said openings.
A punch system for preparing a tibial bone for a prosthetic implant, said punch system comprising:
- a revision tibial tray trial comprising:
- a stem;
- a punch opening for receiving a punch;
- a mating portion for receiving an alignment handle;
- and
- an alignment handle comprising:
- a body having a connecting end portion, said connecting end portion comprising a locking member having at least one tab portion extending from said body and arranged to engage into an opening in said tray trail to prevent tray trail movement away from said body;
- a connecting member located at said connecting end portion, said connecting member having a first position whereby said connecting member may be coupled with said mating portion of said tray trial;
- and a second position, whereby said connecting member is released from the mating portion of said tibial tray trial, wherein said connecting member is biased towards said first position;
- and
- a hand actuable quick-release button located on said body and coupled to said connecting member, said button actuable to move said connecting member from said first position to said second position.
Dependencies are inferred from the claim text.