A system for performing at least a portion of a robotic knee arthroplasty can include a robotic surgical device including an end effector configured to receive a trial component removably connected thereto. The trial component can be engageable with a resected bone. The system can include a processor communicatively coupled to the surgical robot. The processor can be configured to determine a characteristic of the resected bone. The processor can be configured to plan a placement location of the trial component on the resected bone based on the determined characteristic of the resected bone. The processor can be configured to move the end effector to position the trial component on the resected bone based on the determined characteristic of the resected bone and based on the plan.

The present application relates to an assembly for a joint (1, 2, 3, 4), the joint comprising a joint implant (5, 6) between a proximal segment of a limb that is proximal to the joint and a distal segment of the limb that is distal to the joint and in which the joint is configured to allow rotation of the proximal and distal segments with respect to one another about an axis that intersects a first plane, and to inhibit rotation in the second and third plane, both perpendicular to the first plane, the assembly being for subjecting the joint at predetermined angles of the joint rotation in the second and third plane to a defined bending moment to induce a load to the implant that causes a movement of the implant in relation to the bone of the proximal or distal segments.

The present application relates to an assembly for a joint (1, 2, 3, 4), the joint comprising a joint implant (5, 6) between a proximal segment of a limb that is proximal to the joint and a distal segment of the limb that is distal to the joint and in which the joint is configured to allow rotation of the proximal and distal segments with respect to one another about an axis that intersects a first plane, and to inhibit rotation in the second and third plane, both perpendicular to the first plane, the assembly being for subjecting the joint at predetermined angles of the joint rotation in the second and third plane to a defined bending moment to induce a load to the implant that causes a movement of the implant in relation to the bone of the proximal or distal segments.

An orthopedic system for delivery of a therapeutic agent to a bone includes an elongate stem adapted to be inserted into an intramedullary canal, an inlet configured to receive the therapeutic agent, and one or more outlets configured to deliver the therapeutic agent to the bone. The elongate stem may comprise one or more protrusions to engage the bone, and one or more channels extending longitudinally therein, fluidly coupled to the inlet. The therapeutic agent flows from the inlet through the one or more channels and exits into the intramedullary canal through the one or more outlets. The system may be configured to allow one or more dimensions of the system to be adjusted to accommodate the anatomy of a patient.

An orthopedic system for delivery of a therapeutic agent to a bone includes an elongate stem adapted to be inserted into an intramedullary canal, an inlet configured to receive the therapeutic agent, and one or more outlets configured to deliver the therapeutic agent to the bone. The elongate stem may comprise one or more protrusions to engage the bone, and one or more channels extending longitudinally therein, fluidly coupled to the inlet. The therapeutic agent flows from the inlet through the one or more channels and exits into the intramedullary canal through the one or more outlets. The system may be configured to allow one or more dimensions of the system to be adjusted to accommodate the anatomy of a patient.

A cement restrictor inserter instrument (130) comprises an inserter (131) having a handle (132) at a proximal end, a cement restrictor attachment formation (137) at a distal end for releasably attaching a cement restrictor (150), a shaft (136) extending from the proximal end to the distal end and a stop (138) on the shaft and between the proximal end and the distal end; and a body (140) having a shape corresponding to the shape of an orthopaedic prosthetic implant, a spacer (142), a visible depth guide feature (190) and a releasable attachment mechanism by which the body is releasably attachable to the shaft, and wherein the spacer is configured to position the visible depth guide feature at a fixed position relative to the inserter when the spacer abuts the stop corresponding to a target cement restrictor position when the visible depth guide feature is aligned with a feature of a bone of a patient in which the cement restrictor is to be inserted.

A femoral prosthesis includes a femur body and a cam portion. A joint surface of the femur body has a first joint surface portion for abutting a tibial prosthesis within a first knee flexion angle range from a first knee flexion angle to a second knee flexion angle, and a second joint surface portion for abutting the tibial prosthesis within a second knee flexion angle range from the second knee flexion angle to a third knee flexion angle. At the second knee flexion angle, the first joint surface portion has a first radius of curvature, and the second joint surface portion has a second radius of curvature. A center of circle of an anterior joint surface of the cam portion is located in a first quadrant of a center of circle with the second radius of curvature in a sagittal section when the femoral prosthesis is in an extended state.

A femoral prosthesis includes a femur body and a cam portion. A joint surface of the femur body has a first joint surface portion for abutting a tibial prosthesis within a first knee flexion angle range from a first knee flexion angle to a second knee flexion angle, and a second joint surface portion for abutting the tibial prosthesis within a second knee flexion angle range from the second knee flexion angle to a third knee flexion angle. At the second knee flexion angle, the first joint surface portion has a first radius of curvature, and the second joint surface portion has a second radius of curvature. A center of circle of an anterior joint surface of the cam portion is located in a first quadrant of a center of circle with the second radius of curvature in a sagittal section when the femoral prosthesis is in an extended state.

In a tibial component, an engagement mechanism configured to engage a tibial block and a tibial tray includes a recessed portion that is disposed in a lower surface, is non-penetrating, and includes an overhanging portion protruding inward more on an opening side than on a bottom portion side in at least a part of an inner wall; and a projecting portion that protrudes from the tibial block to the lower surface side, and includes a protruding part configured to engage with the overhanging portion.

In a tibial component, an engagement mechanism configured to engage a tibial block and a tibial tray includes a recessed portion that is disposed in a lower surface, is non-penetrating, and includes an overhanging portion protruding inward more on an opening side than on a bottom portion side in at least a part of an inner wall; and a projecting portion that protrudes from the tibial block to the lower surface side, and includes a protruding part configured to engage with the overhanging portion.