Abstract:
PROBLEM TO BE SOLVED: To provide an orthopedic surgical instrument assembly.SOLUTION: An orthopedic surgical instrument assembly includes an instrument handle configured to clamp a broach and femoral stem trial assembly. A depth stop is configured to removably couple to the instrument handle. When the broach and femoral stem trial is advanced into a medullary canal of a patient's femur, a substantially planar proximal surface of the depth stop is configured to engage the distal surface of the femur, determining the depth of the broach in the medullary canal. The proximal surface of the depth stop is parallel to the joint line, defining an oblique angle to the anatomical axis of the femur. The depth stop may be attached to the instrument handle at a number of positions to control the depth of the broach. The assembly may include a spacer plate removably coupled to the depth stop, which distalizes the broach in the medullary canal.
Abstract:
PROBLEM TO BE SOLVED: To provide an orthopedic surgical instrument.SOLUTION: An orthopedic surgical instrument for use in disassembling an orthopedic prosthesis includes a main component, a rod, and a spindle. The main component has a housing and an elongated body extending from the housing with a passageway defined in the elongated body. The rod has an elongated shaft greater in length than the elongated body extending from the head of the rod and configured to pass through the main component. The spindle screw screws into the housing to move the rod along a longitudinal axis.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for joint line assembly of an orthopedic prosthesis assembly.SOLUTION: A method includes inserting a tapered post of a first prosthetic component into a tapered bore of a second prosthetic component along a longitudinal axis to secure the first prosthetic component to the second prosthetic component. A shaft of a fastener is advanced along the longitudinal axis through a threaded passageway defined in the second prosthetic component and into the first prosthetic component. The threaded passageway has a greater diameter than a diameter of the shaft. The end of the shaft is threaded into a threaded aperture defined in the first prosthetic component.
Abstract:
PROBLEM TO BE SOLVED: To provide an implantable orthopedic knee prosthesis assembly.SOLUTION: An implantable orthopaedic knee prosthesis assembly includes a femoral component, a stem component, a fastener, and a retention device. The femoral component is configured to be implanted into a distal end of a femur of a patient and includes a stem post having a proximal tapered bore, a distal passageway, and a threaded passageway connecting the proximal tapered bore and the distal passageway. The stem component is configured to taper-fit to the femoral component and includes a bore formed therein extending proximally and a threaded aperture defined at a proximal end of the bore. The head of the fastener is configured to be received in the distal passageway, whereas the proximal end of the shaft of the fastener is configured to be positioned in the threaded aperture. The retention device is received in the threaded passageway and prevents the proximal end of the fastener from reentering the threaded passageway.
Abstract:
PROBLEM TO BE SOLVED: To provide an assembly tool for use in assembling orthopedic prosthetic components.SOLUTION: An assembly tool includes a frame, a base plate that includes a mounting bracket configured to engage a first end of an orthopedic prosthetic component, and a mechanical actuator configured to apply a compressive load to the orthopedic prosthetic component.
Abstract:
PROBLEM TO BE SOLVED: To provide a surgical instrument for use during a surgical procedure to implant a knee prosthesis in the patient's knee.SOLUTION: A surgical instrument includes a canal reamer 60 having an elongated shank 62 that includes a proximal end 64 configured to fit into a chuck of a rotary power tool and a cutting head 66 located at a distal end of the shank. The cutting head includes a cutting tip 68 with a plurality of helical cutting flutes 70 extending away from the cutting tip in a direction toward the proximal end of the elongated shank. The canal reamer includes a number of depth marks 72, 74, 76, 78, 80, 82, 84, 86 formed in the cutting head. Each of the depth marks corresponds to a different depth to which the canal reamer may be advanced to prepare the patient's intramedullary canal for one of a number of different stem components. An implant reference guide associated with the marks of the canal reamer is also prepared.