Back to results
US 9,433,425 B2Granted
Devices and methods for performing knee arthroplasty
AssigneeSmith & Nephew, Inc.
InventorZachary Christopher Wilkinson
Life of this patent
Estimating the term…
Abstract
Methods and devices for performing knee arthroplasty including but not limited to bicruciate retaining knee arthroplasty are provided. Methods and devices for preparing a proximal tibia for a tibial implant are also provided. These methods and devices, in at least some embodiments and uses, facilitate decreasing the complexity of knee arthroplasty procedures such as bicruciate retaining procedures while maintaining, if not improving on, the safety, accuracy and/or effectiveness of such procedures.
Claims50
Instrumentation for performing arthroplasty on a knee joint including a proximal tibia, comprising:
- a datum instrument configured to provide a reference foundation to which other devices or instruments are releasably attached, comprising:
- a main body configured for attachment to the proximal tibia, the main body including an elongate slot extending therethrough in an anterior-posterior direction and having a slot length extending generally in a superior-inferior direction;
- and
- a reference bench extending from the main body and configured for releasable engagement with at least one other device or instrument adapted for performing arthroplasty on the knee joint;
- and
- a provisional attachment pin including a distal bone anchoring portion and a proximal portion, the provisional attachment pin extending through the elongate slot in the main body of the datum instrument with the distal bone anchoring portion anchorable within bone and the proximal portion positioned within the elongate slot to provisionally attach the datum instrument to the proximal tibia, the proximal portion of the provisional attachment pin slidably engaged within the elongate slot to adjust the position and/or orientation of the datum instrument relative to the proximal tibia prior to terminal attachment of the datum instrument to the proximal tibia.
3 more elements
Instrumentation for performing arthroplasty on a knee joint including a proximal tibia, comprising:
- a datum instrument configured to provide a reference foundation to which other devices or instruments are releasably attached, comprising:
- a main body configured for attachment to the proximal tibia, the main body including a plurality of pin-receiving openings extending therethrough in an anterior-posterior direction;
- a reference bench extending from the main body and configured for releasable engagement with at least one other device or instrument adapted for performing arthroplasty on the knee joint;
- and
- a compression lock mechanism incorporated into the main body and operable to releasably lock the at least one other device or instrument to the reference bench;
- and
- a plurality of attachment pins each including a distal bone anchoring portion and a proximal portion, the attachment pins extending through respective ones of the pin-receiving openings in the main body of the datum instrument with the distal bone anchoring portions anchorable within bone and the proximal portions positioned within the pin-receiving openings to attach the datum instrument to the proximal tibia.
4 more elements
Instrumentation for performing arthroplasty on a knee joint including a proximal tibia, comprising:
- a datum instrument configured to provide a first reference foundation to which other devices or instruments are releasably attached;
- a revision instrument configured to be interchangeable with the datum instrument to provide a second reference foundation to which the other devices or instruments are releasably attached;
- and
- a plurality of attachment pins each including a distal bone anchoring portion configured for anchoring within bone and a proximal portion engagable with the datum instrument and the revision instrument to selectively attach either the datum instrument or the revision instrument to the proximal tibia;
- wherein the datum instrument and the revision instrument each include:
- a main body configured for attachment to the proximal tibia and including a plurality of pin-receiving openings extending therethrough generally in an anterior-posterior direction;
- and
- a reference bench extending from the main body and configured for releasable engagement with at least one other device or instrument adapted for performing arthroplasty on the knee joint, the reference bench including a substantially planar reference surface;
- wherein the plurality of attachment pins extend through respective ones of the pin-receiving openings in the main body of the datum instrument with the distal bone anchoring portions anchorable within bone and the proximal portions positioned within the pin-receiving openings to attach the datum instrument to the proximal tibia;
- wherein the pin-receiving openings in the main body of the revision instrument have the same relative position and orientation as the pin-receiving openings in the main body of the datum instrument whereby the revision instrument is interchangable with the datum instrument on the proximal portions of the same attachment pins that attach the datum instrument to the proximal tibia;
- and
- wherein the planar reference surface of the datum instrument extends along a first reference plane when the datum instrument is engaged with the proximal portions of the attachment pins, the planar reference surface of the revision instrument extending along a second reference plane when the revision instrument is engaged with the attachment pins, and wherein the second reference plane is not co-planar with the first reference plane.
9 more elements
Instrumentation for performing arthroplasty on a knee joint including a proximal tibia, comprising:
- a datum instrument configured for attachment to the proximal tibia to provide a reference foundation to which other devices or instruments are releasably attached;
- a replacement instrument configured to be interchangeable with the datum instrument on the proximal tibia;
- and
- a plurality of attachment pins each including a distal bone anchoring portion configured for anchoring within bone and a proximal portion engagable with the datum instrument and the replacement instrument to selectively attach either the datum instrument or the replacement instrument to the proximal tibia;
- wherein the datum instrument and the replacement instrument each include a mounting base configured for attachment to the proximal tibia, the mounting base including at least one pin-receiving opening extending therethrough generally in an anterior-posterior direction;
- wherein the attachment pins extend through the at least one pin-receiving opening in the mounting base of the datum instrument with the distal bone anchoring portions anchorable within bone and the proximal portions positioned within the at least one pin-receiving opening to attach the datum instrument to the proximal tibia;
- and
- wherein the at least one pin-receiving opening in the mounting base of the replacement instrument has the same relative position and orientation as the at least one pin-receiving opening in the mounting base of the datum instrument whereby the replacement instrument is interchangable with the datum instrument on the proximal portions of the same attachment pins that attach the datum instrument to the proximal tibia.
5 more elements
Dependencies are inferred from the claim text.