Patellar clamp and reamer with adjustable stop
First Claim
1. A surgical instrument for the resection of a bone, said surgical instrument comprising:
- a first jaw member and a second jaw member for clamping a bone therebetween, said first jaw member including a reamer opening defined by a first sidewall having a first diameter;
a reamer for reaming the bone upon movement of said reamer with respect to said first and second jaw members;
means for guiding movement of the reamer as said reamer moves relative to said first and second jaw members, said means for guiding movement of said reamer being displaced from said first and second jaw members; and
means for limiting movement of said reamer upon engagement with said means for guiding;
said reamer including a cutting blade assembly and a portion mountable for rotation within said means for guiding;
said means for guiding including an end surface and an axial bore extending from said end surface for receiving said reamer, said axial bore defined by a second sidewall having a second diameter, said first diameter being different from said second diameter; and
whereinsaid means for limiting movement of said reamer upon engagement with said means for guiding including means for engaging and releasing said reamer so as to adjust the position of said cutting blade assembly with respect to said second jaw member.
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Accused Products
Abstract
A method and surgical instrument is provided for the in situ clamping engagement and reaming of the human patella bone in preparation for the installation of a patellar button prosthesis, the clamp including a rectangular frame wherein a pair of handles are mounted for parallel movement whereby to move their respective jaws into clamped engagement with the opposite faces of the patella, and a guide head defining a fixed stop; and a reaming device including a reamer shaft disposed for rotation relative to the guide head, a depth adjustment head connected to the shaft and adapted to abut the fixed stop, and a reamer blade mounted to the shaft. The shaft is provided with indicia to indicate the thickness of the patella that will remain after the resection.
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Citations
17 Claims
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1. A surgical instrument for the resection of a bone, said surgical instrument comprising:
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a first jaw member and a second jaw member for clamping a bone therebetween, said first jaw member including a reamer opening defined by a first sidewall having a first diameter; a reamer for reaming the bone upon movement of said reamer with respect to said first and second jaw members; means for guiding movement of the reamer as said reamer moves relative to said first and second jaw members, said means for guiding movement of said reamer being displaced from said first and second jaw members; and means for limiting movement of said reamer upon engagement with said means for guiding; said reamer including a cutting blade assembly and a portion mountable for rotation within said means for guiding; said means for guiding including an end surface and an axial bore extending from said end surface for receiving said reamer, said axial bore defined by a second sidewall having a second diameter, said first diameter being different from said second diameter; and
whereinsaid means for limiting movement of said reamer upon engagement with said means for guiding including means for engaging and releasing said reamer so as to adjust the position of said cutting blade assembly with respect to said second jaw member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for the resection of a patella prior to implantation of a prosthetic device onto a femur from which a portion has been resected, the resected portion having an intercondylar thickness, said method comprising the steps of:
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forming a surgical instrument operable to resect the patella; determining the intercondylar thickness of the resected portion of the femur; and resecting the patella to a depth at least in part determined by the intercondylar thickness of the resected portion of the femur. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification