554 results about "Tibia bone" patented technology

A modular prosthetic knee system used to replace the natural knee. The system includes a femoral knee prosthesis and a tibial knee prosthesis. Both prostheses are formed of modular components that are connectable in-vivo to form the prosthetic knee system. The femoral knee prosthesis includes two separate components, a lateral condyle and medial condyle; and the tibial knee prosthesis includes a multiple separate components, a medial baseplate, a lateral baseplate, a medial insert, and a lateral insert. The medial and lateral baseplate are connectable to form a complete baseplate with the medial and lateral inserts connectable to the complete baseplate.

A prosthetic knee implant for implantation into a mammal, which accommodates an anterior cruciate ligament substitute to provide stability to the knee implant. The prosthetic knee implant includes a femoral component having a pair of condylar surfaces and a tibial component having a surface portion adapted to slidably engage the femoral component upon rotation of the same. The femoral component further includes a recess between the condyles defining an aperture through the femoral component. The tibial component further includes a center portion defining an aperture through the tibial component substantially at its center. The femoral aperture and the tibial aperture are adapted to receive an anterior cruciate ligament substitute for biasing the mammalian femur and tibia together. Also disclosed is a method used to replace the total knee joint in a mammal with the improved prosthetic knee implant of the present invention.

A knee prosthesis is provided that allows for increased flexion. The knee prosthesis includes (a) a femoral component adapted to fit on a distal end of the femur which includes a lateral condylar structure and a medial condylar structure and (b) an intermediate structure configured to cooperate with a femoral component of a knee prosthesis. The intermediate structure includes at least one surface for contacting the femoral component and a transition of a sagittal curvature of the at least one contact surface from a concave surface into a convex surface at the contact interface of the femoral component and the intermediate structure when the knee is flexed at approximately 120° to 140°. The knee prosthesis minimizes impingement on the femoral posterior cortex in deep flexion, increases the dislocation safety factor and allows for easier reengagement of the articular surface should the femoral component externally rotate off of the tibial plateau.

A knee prosthesis is provided that allows for increased flexion. The knee prosthesis includes (a) a femoral component adapted to fit on a distal end of the femur which includes a lateral condylar structure and a medial condylar structure and (b) an intermediate structure configured to cooperate with a femoral component of a knee prosthesis. The intermediate structure includes at least one surface for contacting the femoral component and a transition of a sagittal curvature of the at least one contact surface from a concave surface into a convex surface at the contact interface of the femoral component and the intermediate structure when the knee is flexed at approximately 120° to 140°. The knee prosthesis minimizes impingement on the femoral posterior cortex in deep flexion, increases the dislocation safety factor and allows for easier reengagement of the articular surface should the femoral component externally rotate off of the tibial plateau.

It is the object of the invention to provide a knee bracing system that bolsters the body's natural ligaments to reduce the knees proneness to injury or re-injury. The invention is a cable system that acts much like the body's natural ACL and MCL. The cables are routed around the knee joint in a way that resists the forces that cause excessive joint movement and injury to the ACL and or MCL. As the leg travels through the range of motion the cables provide external hyper extension, bending, and rotation support preventing the tibia bone from moving forward (hyper extending) or twisting (lateral rotation) and or laterally bending with respect to the femur.

The knee prosthesis with rotary plate comprises a metal base (2) and a tibia plate (3) which are equipped with guide means (22, 22′, 22″, 26, 29, 5, 6, 5′, 9, 50, 51, 52, 13, 15, 18; 34, 34′, 34″, 35, 37, 7, 8, 10, 12, 53, 54, 55, 10′, 17) defining a center of rotation (C, C′) which may be offset from that of the tibia bone axis (YY′), so as to allow the tibia plate (3) to slide in rotation over the said base, the said guide means being positioned a certain distance away from the center of rotation (C, C′).

The invention is directed toward a method and instrumentation to replace a damaged human knee joint meniscus with an allograft meniscus. The implant has its bone base cut to a desired width in a workstation. The finished base is measured in the sizing groove of the sizing block for width and length. The tibia is then drilled with drill to the appropriate depth and length and groove is formed in the tibia with a tissue chisel so that the width is the same as the width of the bone base. The bone base is press fit into the tibia groove and may be secured with a bone screw.

A knee brace having a femur support section pivotally connected to a tibia support section is provided. The femur support section has a medial frame and a lateral frame, sandwiched between width adjustment plates. The width adjustment plates hold the lateral and medial frames, and are held together by retainer bolts and nuts. The retainer bolts and nuts can be loosened to permit the lateral frame and the medial frame to slide against the width adjustment plates. Thus, the space between the lateral frame and the medial frame can be adjusted according to the size of the wearer's leg.

A combination of a first assembly for guiding resection of a femur and tibia of a knee joint and a second assembly including femoral and tibial knee components. The combination of the first assembly and the second assembly provides optimal placement and positioning of the femoral and tibial knee components to achieve near-normal knee kinematics and tension. The preparation for and placement of the prosthetic knee components provides medial-pivoting kinematics mimicking that of the natural knee thereby promoting improved outcome for the patient.

A prosthetic knee implant for implantation into a mammal, which accommodates an anterior cruciate ligament substitute to provide stability to the knee implant. The prosthetic knee implant includes a femoral component having a pair of condylar surfaces and a tibial component having a surface portion adapted to slidably engage the femoral component upon rotation of the same. The femoral component further includes a recess between the condyles defining an aperture through the femoral component. The tibial component further includes a center portion defining an aperture through the tibial component substantially at its center. The femoral aperture and the tibial aperture are adapted to receive an anterior cruciate ligament substitute for biasing the mammalian femur and tibia together. Also disclosed is a method used to replace the total knee joint in a mammal with the improved prosthetic knee implant of the present invention.

The invention is directed toward an instrumentation kit used to replace a damaged human knee joint meniscus with an allograft meniscus implant. The kit includes a workstation having a base and upright end sections with a clamping assembly is mounted on the end sections and a movable cutting guide mounted to a side wall of each end section. The tibia is then drilled with a drill to a desired depth and length and a groove is formed in the tibia with an osteotome so that the width is the same as the width of the bone base of the meniscus implant which has been trimmed in the workstation.

A bone surgery device with a reciprocating cutting head. The device comprises several sets of shaping surfaces sometimes including cutting blades, which are located and oriented so as to shape the distal end of the femur and the proximal end of the tibia for total knee replacements and unicompartmental knee replacements. The device, which may be hand directed or aided by spatial and directional guiding mechanisms or an optical navigation system, may also include both coolant supply for controlling heat during bone, cutting and shaping, and a suction method for carrying away fluid and debris. The device is substantially configured to the artificial joint component to be attached thereto.

The invention belongs to the field of medical apparatus, and particularly relates to a bone induction differentiated metal bone trabecula knee joint prosthesis and a preparation method thereof under the precision control using incremental manufacturing technology. The prosthesis comprises a femoral condyle prosthesis, a tibial plateau prosthesis, a tibial plateau pad prosthesis and a patellar prosthesis. Osseointegration interfaces of the femoral condyle prosthesis, tibial plateau prosthesis and patellar prosthesis is in the structure of the bone induction differentiated metal bone trabecula. The preparation method comprises the steps of determining the gradient structure of stress and strain in knee prosthesis, determining the parameters of the porous structure of trabecular bone, establishing a three-dimensional model of the porous structure, conducting slicing and stratification treatment of the three-dimensional model, and conducting electron beam incremental manufacturing of the knee joint prosthesis metal bone trabecula, cooling to obtain the final finished product. The bone induction differentiated metal bone trabecula knee joint prosthesis and the preparation method thereof for the first time achieve the balance between the stress and bone induction performance for stress regions of different osseointegration interfaces of bone in knee joint, satisfy the differentiation requirement of bone induction, provide a preparation method of mass production, and effectively reduces manufacturing cost.

A knee pad assembly for relieving the symptoms of patellar tendinitis, including a pad adapted for being positioned against and molded onto a lower leg in the region of the knee for lying in closely-conforming relation against and applying radially-directed pressure to the attachment site of the patellar tendon to the patella, to the knee joint, and to at least one epicondyle of the tibia. The pad is hardened into a rigid structure for therapeutic use and includes an initially flexible inner substrate impregnated or coated with a reactive system. The system remains stable when maintained in substantially moisture-free conditions and hardens upon exposure to moisture to form a rigid, self-supporting structure having a shape conforming to the lower leg to which the pad is molded during curing. A flexible cover encloses the substrate, and cooperates with the pad for maintaining the pad in its closely-conforming position against the lower leg.

A method for treating a patient suffering from osteoarthritis and an internal brace for distraction arthroplasty including femoral and tibial components which can be fixed to a patient's femur and tibia and which in combination distract or separate the knee joint without substantially hindering mobility of the knee.

A method and apparatus for exercise of the gluteus medius and gluteus minimus muscle complex against resistance in internal rotation, the tibialis posterior in internal rotation and inversion, the piriformis muscle and its synergists in external rotation and the peroneal muscles in external rotation and eversion is disclosed. The apparatus is comprised of a stable base having a rotatable foot support plate mounted on the base upward at a predetermined angle from the horizontal in order to dorsiflex the user's foot. Means to adjust the rotational resistance of the rotatable foot support plate is provided. The device includes a back support to assist in maintaining the user's pelvis in a neutral position. The device provides internal and external resistance to isolate and exercise the gluteus medius and gluteus minimus muscle complex or the piriformis and synergists while the user is in a standing position. It further provides internal and external resistance to exercise the tibialis posterior and the peroneals in either the standing or seated position.