Slotted patella resection guide and stylus
First Claim
1. Apparatus for guiding a saw used to perform resection of a bone, comprising:
- (a) means for gripping said bone, including first and second arms pivotally mounted together at a first pivot axis, wherein each of said arms has a handle portion at one end and a jaw member at the other end whereby pivoting of said handle portions towards one another causes said jaw members to pivot toward one another about said pivot axis and into engagement with the periphery of said bone;
(b) guide means, formed integrally within said jaw members and defining a plane of resection, for receiving and guiding a saw blade; and
(c) means for setting resection depth which includes at least two calibrated and marked steps integrally formed in said means for gripping said bone, whereby a stylus can be removably inserted into a selected one of the at least two steps to set the resection depth.
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Accused Products
Abstract
A slotted patella resection guide and stylus used in the preparation of the human patella to accept a patella prosthesis in total knee arthroplasty. The guide includes jaw members for gripping bone, the jaw members including a plurality of calibrated and marked steps (slots) located at a different fixed predetermined height above the desired resection level. Each slot accepts the stylus which may be at least temporarily secured therein. After determining the amount of bone to resect, the stylus is temporarily secured in the appropriate slot (marked as being calibrated to yield the amount of resection desired); and the guide is then clamped onto the patella at the location indicated by the guide/stylus combination, with the stylus resting on the patella in the area where its thickness was measured to establish the depth of cut. After the guide is clamped in position, a sagittal saw is inserted therein to actually perform the resection. During resection, the stylus may be removed from the guide to enhance visibility. The jaws of the guide include a saw capture slot which defines the plane of resection and accepts the saw blade to provide greater control of the cut during the operation. A saw blade insertion guide is also integrated into the resection guide to ease the process of inserting the blade into the capture slot and enhance safety characteristics of the instrument.
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Citations
18 Claims
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1. Apparatus for guiding a saw used to perform resection of a bone, comprising:
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(a) means for gripping said bone, including first and second arms pivotally mounted together at a first pivot axis, wherein each of said arms has a handle portion at one end and a jaw member at the other end whereby pivoting of said handle portions towards one another causes said jaw members to pivot toward one another about said pivot axis and into engagement with the periphery of said bone; (b) guide means, formed integrally within said jaw members and defining a plane of resection, for receiving and guiding a saw blade; and (c) means for setting resection depth which includes at least two calibrated and marked steps integrally formed in said means for gripping said bone, whereby a stylus can be removably inserted into a selected one of the at least two steps to set the resection depth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Apparatus for guiding a saw used to perform resection of a bone, comprising:
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(a) means for gripping said bone, including first and second arms pivotally mounted together at a first pivot axis, wherein each of said arms has a handle portion at one end and a jaw member at the other end whereby pivoting of said handle portions towards one another causes said jaw members to pivot toward one another about said pivot axis and into engagement with the periphery of said bone; (b) guide means, formed integrally within said jaw members and defining a plane of resection, for receiving and guiding a saw blade; and (c) means for setting resection depth which includes at least two calibrated and marked steps integrally formed in said means for gripping said bone and further including a stylus that is removably attachable to said steps. - View Dependent Claims (16, 17, 18)
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Specification