摘要:
A method and apparatus for correcting limb alignment in a unicondylar knee arthroplasty and linking the distal femoral cut and the proximal tibial cut. Alignment rods are connected to a spacing apparatus to facilitate correction of limb alignment. The alignment rods are positioned along the mechanical axis of the femur and the tibia and the knee joint is positioned to correct alignment. A spacing apparatus is positioned in the relevant knee compartment and utilized to hold the knee in position to correct limb alignment. The spacing apparatus includes a femoral cut slot through which the distal femoral cut is made and further includes tibial affixment apertures through which a headless securing device can be positioned to secure the spacing apparatus to the tibia. After the distal femoral resection is complete, the spacing apparatus is removed, with the headless securing devices remaining positioned in the tibia. The headless securing devices are used as a reference for securing a tibial cut block to the tibia for making the proximal tibial resection. With the mechanism of the present invention, the knee can be placed in flexion when making the proximal tibial cut and the distal femoral cut is linked to the proximal tibial cut.
摘要:
A method and apparatus for correcting limb alignment in a unicondylar knee arthroplasty and linking the distal femoral cut and the proximal tibial cut. Alignment rods are connected to a spacing apparatus to facilitate correction of limb alignment. The alignment rods are positioned along the mechanical axis of the femur and the tibia and the knee joint is positioned to correct alignment. A spacing apparatus is positioned in the relevant knee compartment and utilized to hold the knee in position to correct limb alignment. The spacing apparatus includes a femoral cut slot through which the distal femoral cut is made and further includes tibial affixment apertures through which a headless securing device can be positioned to secure the spacing apparatus to the tibia. After the distal femoral resection is complete, the spacing apparatus is removed, with the headless securing devices remaining positioned in the tibia. The headless securing devices are used as a reference for securing a tibial cut block to the tibia for making the proximal tibial resection. With the mechanism of the present invention, the knee can be placed in flexion when making the proximal tibial cut and the distal femoral cut is linked to the proximal tibial cut.
摘要:
An orthopedic knee component for implanting within a single compartment of a human knee includes, in a first embodiment a tibial tray having a superior surface having a plurality of tabs disposed along an exterior edge thereof, a bearing component having a superior surface adapted to articularly engage a femoral knee prosthesis and a circumferential groove disposed therearound with which the tabs of the tibial tray cooperatively engage such that the bearing component is movable relative to the tibial tray. In a second embodiment, an orthopedic knee component for implanting within a single compartment of a human knee includes: a tibial tray in supporting engagement with a bearing component, wherein the bearing component includes a superior surface adapted to articularly engage a femoral knee prosthesis and a pair of slots disposed along the superior surface of the bearing component, the femoral component having a pair of rails extending from the articulating surface thereof such that the rails can slidingly engage the slots, and such that the bearing component is movable relative to the tibial tray.
摘要:
A two-piece cut block for performing a minimally invasive partial or total knee arthroplasty. The present invention comprises a cut block that can be inserted into an incision in two parts then assembled in vivo. The two-piece design allows the relatively large surgical instrument to fit into a small, minimally invasive, surgical incision
摘要:
An apparatus for resecting a distal femoral condyle includes a resection guide defining a first bone fixation aperture extending about an axis. The resection guide further defines a first bone saw slot and a second bone saw slot. The resection guide is configured to position the first bone fixation aperture relative to the condyle. The resection guide is further configured to concurrently arcuately translate the first bone saw slot and the second bone saw slot relative to the axis. A knee replacement kit includes a femoral implant defining a first plan contour. The kit further includes a resection guide defining a second plan contour modeling the first plan contour.
摘要:
A mobile bearing unicondylar tibial knee prosthesis includes a tibial base plate and a tibial articular surface component. The inferior surface of the articular surface component engages the superior surface of the base plate in sliding relationship. The tibial articular surface and a stop on the tibial base plate define a tab and groove engagement between them such that the tibial articular surface component is permitted to slide anteriorly-posteriorly on the tibial base plate while movement of the tibial articular surface component superiorly away from the base plate is restricted.
摘要:
A bone resection apparatus and its method of use for knee surgery are presented. In one aspect of the invention, the apparatus includes a spacer and a tibial cut guide. The spacer has a first surface engageable with the cut distal femoral bone and a second surface opposite the first surface engageable with the uncut proximal tibial bone in joint articulating relationship. The spacer further includes a cut guide support. The tibial cut guide has a cutter guide defining a cut plane and a support engaging element engageable with the cut guide support. The cut guide support and support engaging element cooperate to position the cut plane in relative to the first surface.
摘要:
An apparatus is provided for attaching a surgical component to a bone at a surgical site. The apparatus includes an elongated pin and a cam mounted to the pin. The cam is engaged with the surgical component such that rotating the cam about the shaft axis changes the surgical component position relative to the bone.
摘要:
The present invention relates to a bone-cutting guide used during arthroplasty. The bone-cutting guide is intended to be temporarily positioned against the distal femur or proximal tibia bone surface and to receive a cutting member. The bone-cutting guide is intended to cut the bone generally transverse to the length of the bone, and includes a main body and a paddle. The main body has a width defined between first and second surfaces. A cutting tool receiving portion, which is configured and arranged to receive the cutting member, extends from the first surface to the second surface. The main body is configured to be placed against a side surface of the bone. The paddle extends from the main body and includes a bone-contacting surface that is configured and arranged to be positioned generally parallel against the distal femur or the proximal tibia bone surface.