An orthopaedic surgical instrument system includes a hinged tibial insert trial and a tibial base trial. A post adapter is sized to be positioned over a post of the tibial base trial and to be positioned in a central opening defined in the hinged tibial insert trial. The hinged tibial insert trial includes a housing configured to be received in a femoral component and a button mechanism to selectively secure the hinged tibial insert trial to the femoral component. The system may include a shim trial sized to be attached to an inferior surface of the hinged tibial insert trial.

A total knee prosthesis system that includes a guide having first and second wedges each having a thickness configured to be located between the tibial and femoral component. When the first and second wedges are located between the tibial and femoral component, the first and second wedges align the first axle opening of the tibial component with the second axle opening of the femoral component for receipt of an axle. The guide includes a guide recess extending between the first and second wedges and a post extending into the guide recess. The guide also includes a bridge connected to and extending between the first and second wedges such that the bridge at least partially defines the guide recess.

An orthopaedic surgical instrument system includes a hinged tibial insert trial and a tibial base trial. A post adapter is sized to be positioned over a post of the tibial base trial and to be positioned in a central opening defined in the hinged tibial insert trial. The hinged tibial insert trial includes a housing configured to be received in a femoral component and a button mechanism to selectively secure the hinged tibial insert trial to the femoral component. The system may include a shim trial sized to be attached to an inferior surface of the hinged tibial insert trial.

An endoprosthesis for knee joint arthrodesis having a femur portion including a femur attachment structure; a tibia portion including a tibia attachment structure; a coupling section formed on the femur portion and a coupling section formed on the tibia portion. The coupling sections are pivotably connected to one another about a prosthesis pivot axis that extends in the installed position of the endoprosthesis horizontally from medial to lateral. A locking element is moveable between locking and release positions. In the locking position the locking element rigidly locks the coupling sections in a predefinable pivot position. In the release position the coupling sections are pivotable relative to one another about the prosthesis pivot axis. A retaining and return means and an unlocking mechanism are provided. The retaining means forces the locking element into the locking position. The unlocking mechanism moves the locking element into the release position.

A total knee prosthesis system that includes a guide having first and second wedges each having a thickness configured to be located between the tibial and femoral component. When the first and second wedges are located between the tibial and femoral component, the first and second wedges align the first axle opening of the tibial component with the second axle opening of the femoral component for receipt of an axle. The guide includes a guide recess extending between the first and second wedges and a post extending into the guide recess. The guide also includes a bridge connected to and extending between the first and second wedges such that the bridge at least partially defines the guide recess.

A system and method for sharing and absorbing energy between body parts. In one particular aspect, the system is an unlinked structure which facilitates absorbing energy between members forming a joint such as between articulating bones.

A bone lengthening system for tumor prostheses includes a prosthesis, wherein the prosthesis includes an internal battery arranged for a wireless charging; the bone lengthening system further includes an extendable mechanism connected to the prosthesis and the extendable mechanism is arranged to be lengthened for, when in use, bringing a length of a limb provided with the prosthesis to a value corresponding to a length of a healthy limb based on healthy limb length data.

A hinged articulating spacer system for revision knee arthroplasty includes a femur rod for a femur, and a tibia rod for a tibia. The tibia rod is hingedly couplable to the femur rod to form a hinged rod assembly. A pre-formed femoral spacer component includes bone cement impregnated with an antibiotic. The pre-formed femoral spacer defines an opening that receives the hinged rod assembly. A pre-formed tibial spacer component includes bone cement impregnated with an antibiotic. The pre-formed tibial spacer defines an opening that receives the hinged rod assembly.

An orthopaedic surgical instrument system includes a hinged tibial insert trial and a tibial base trial. A post adapter is sized to be positioned over a post of the tibial base trial and to be positioned in a central opening defined in the hinged tibial insert trial. The hinged tibial insert trial includes a housing configured to be received in a femoral component and a button mechanism to selectively secure the hinged tibial insert trial to the femoral component. The system may include a shim trial sized to be attached to an inferior surface of the hinged tibial insert trial.

Methods and systems are provided for a hinge knee system. A hinge knee system may comprise a femoral component; an insert; a tibial tray configured to be coupled to the insert; a tibial bushing configured to be disposed between the tibial tray and the insert; a poly locking screw configured to secure the tibial tray to the insert; a hinge box configured to be disposed between the femoral component and the insert; one or more cross-pin bushings configured to be disposed within the hinge box; a cross-pin configured to secure the hinge box to the femoral component; a hinge post configured to couple the hinge box to the tibial tray; and a hinge post set screw configured to secure the hinge box to the hinge post.