Method and instruments for resection of the patella
First Claim
Patent Images
1. A patellar clamp/guide device, comprising:
- a) a first handle having a proximal end and a distal end, and a second handle having a proximal end and a distal end, said handles being coupled together for mutual pivoting movement;
b) said first handle distal end including;
i) a plate having at least one upstanding spike adapted to engage an anterior surface of a patella; and
ii) guide means for guiding a plunger in reciprocatory movements;
c) said second handle distal end being coupled with said plunger whereby pivoting movements of said handles with respect to one another cause movements of said plunger with respect to said guide means;
d) a reamer guide removably attached to said plunger and including a guiding opening therethrough; and
e) stop means for limiting spacing between said plate and said reamer guide to a desired minimum spacing.
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Accused Products
Abstract
Disclosed is a method of performing surgery to resect the patella for the purpose of installation of a patellar prosthesis, along with instruments used in such surgery. The instruments include a combined clamping device and reaming guide which when clamped about the patella provides a guide for reaming the surface thereof as well as a limit stop device designed to prevent reaming the patella too deeply. The instruments also include a reaming device designed to ream an annulus of material from the patella, leaving a central raised portion for fixation of a patellar prosthesis.
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Citations
22 Claims
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1. A patellar clamp/guide device, comprising:
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a) a first handle having a proximal end and a distal end, and a second handle having a proximal end and a distal end, said handles being coupled together for mutual pivoting movement; b) said first handle distal end including; i) a plate having at least one upstanding spike adapted to engage an anterior surface of a patella; and ii) guide means for guiding a plunger in reciprocatory movements; c) said second handle distal end being coupled with said plunger whereby pivoting movements of said handles with respect to one another cause movements of said plunger with respect to said guide means; d) a reamer guide removably attached to said plunger and including a guiding opening therethrough; and e) stop means for limiting spacing between said plate and said reamer guide to a desired minimum spacing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of performing surgery including the steps of:
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a) performing an incision exposing a patella; b) engaging an anterior surface of said patella with a spiked plate; c) moving a reamer guide connected to said plate toward an articular surface of said patella and aligning said reamer guide on said articular surface using a central ridge of said patella as an anatomical landmark to locate and align a proper plane of bone resection; d) in the event said reamer guide engages said articular surface, using said reamer guide to guide a cutting device into engagement with said articular surface to ream said articular surface to form a stepped surface comprising a peripheral recessed surface and a central bony elevated surface; and e) installing a patellar button prosthesis on said reamed surface.
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- 16. In a device for guiding reaming or drilling of an articular surface of a patella, the improvement comprising a patella engaging surface on said device adapted to engage said articular surface, said patella engaging surface having a curved portion merging into a straight portion and at least partially conforming to contours of said articular surface whereby firm engagement of said device on said articular surface may be accomplished and reaming or drilling may be carried out without relative movements between said device and patella.
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21. A patellar clamp/guide device, comprising:
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a) a first handle having a proximal end and a distal end, and a second handle having a proximal end and a distal end, said handles being coupled together for movement with respect to one another; b) said first handle distal end including; i) a plate having a surface thereon adapted to securely engage an anterior surface of a patella; and ii) guide means for guiding a plunger in reciprocatory movements; c) said second handle distal end being coupled with said plunger whereby movements of said handles with respect to one another cause movements of said plunger with respect to said guide means; and d) a reamer guide removably attached to said plunger and including a guiding opening therethrough. - View Dependent Claims (22)
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Specification