548 results about "Tibia bone" patented technology

A knee replacement system includes a proximal tibial posterior camming portion defined by a first radius of curvature with a first origin in a first medio-lateral plane, a distal tibial posterior camming portion defined by a second radius of curvature with a second origin in a second medio-lateral plane, an anterior femoral camming portion of a posterior cam defined by a third radius of curvature with a third origin in the first medio-lateral plane, and a posterior femoral camming portion of the posterior cam and defined by a fourth radius of curvature with a fourth origin in the second medio-lateral plane, wherein the second origin is closer to the lateral tibial portion than the first origin, or the fourth origin is closer to the medial femoral portion than the third origin.

A punch assembly for preparing a tibia bone for a prosthesis includes a static component configured to be supported by the tibia bone and a dynamic component that includes a punch having a stem. The dynamic component is supported for movement relative to the static component along a generally arcuate path to prepare an aperture having an arcuate contour in the tibia bone. A method of preparing a tibial aperture for is also disclosed.

A method for aligning a bone cutting guide on a tibia may involve coupling a cutting guide alignment device and an attached cutting guide with a tibia, adjusting the alignment device in a varus/valgus orientation, adjusting the alignment device in an anterior/posterior orientation, attaching the cutting guide to the tibia, and removing the alignment device from the cutting guide, leaving the cutting guide attached to the tibia. The adjustments to the alignment device may be made according to vertically and horizontally oriented laser lights emitted from the alignment device. As the alignment device is adjusted, the bone cutting guide attached to the alignment device changes position relative to the tibia.

A above knee prosthesis (P) applied to femoral connection (100) of an amputee that comprises a upper hinge (1) connected to femoral connection of the patient, an articulation axis (2) with the function of reproducing the knee movements, a tibia-calf muscle unit (3) pivotally connected to the femoral•segment and a damper (5) that reproduces some functions of the calf muscle and ensures to the prosthesis to brake and to allow the sequential swing and stance phases typical of the gait. The damper comprises a cylinder (5c) wherein a piston (10) and a stem (9) act connected to each other and adapted to carry out a damping reaction of said damper responsive to the forces loaded on the prosthesis. In particular, a force transducer is provided in the damper arranged, in particular, in the stem with a microprocessor that receives a force signal from the transducer and operates means for adjusting the reaction of the damper responsive to the detected force signal.

A knee brace assembly for various uses, e.g., restricting anterior tibial movement. The knee brace assembly includes a proximal cuff for engaging the wearer's leg above the knee and a distal cuff for engaging the wearer's leg below the knee. The proximal and distal cuffs are linked together by a hinge that permits pivotal movement of the proximal cuff relative to the distal cuff. The proximal cuff has lateral and medial portions each having a slot extending there along. A strap guiding assembly is slidably mounted within each of the slots. Each strap guiding assembly is arranged to slide between a proximal extreme when the wearer's leg is in flexion and a distal extreme as the wearer extends his or her leg. A biasing device biases each strap guiding assembly towards its proximal extreme. A cross-strap, having free ends and a length, is provided for engagement with the wearer's leg. The cross-strap attaches to the wearer's leg below the knee and wraps behind the knee in crisscross fashion. The free ends of the strap attach to the strap guiding assembly. The cross-strap is operative in response to extension of the wearer's leg to pull the strap guiding assembly from the proximal extreme towards the distal extreme thus creating a force counteractive to abnormal anterior movement of the tibia.

Devices and method for performing replacement prosthetic knee surgery are disclosed in which a spacing means is introduced between the femur (1) and tibia (2) while the patella (9) is in place. The spacing means separates the femur (1) from the tibia (2) by an amount essentially equal to or greater than the required flexion gap (4). An alignment device (26) is used for performing femoral bone cuts, which device attaches temporarily to a fitted tibial plate.

A method for creating a frame of reference of a leg of a subject for subsequent 3-D kinematic analysis of the leg with non-invasive trackable references secured to the femur and the tibia of the leg. The method comprises the steps of: i) obtaining tibial and femoral axes with respect to the trackable references by tracking points and motions of the leg; ii) registering a known posture of the subject with respect to the trackable references; iii) obtaining a desired posture of the subject with respect to the trackable references as a function of the known posture by tracking a predetermined motion of the leg; and iv) setting a frame of reference to said tibial and femoral axes of the leg in the desired posture of the subject with respect to the trackable references.

The invention discloses an individualized bone cutting guide plate suite and a design method thereof. The individualized bone cutting guide plate suite comprises an individualized knee joint tibia near end bone cutting guide plate, an individualized knee joint femur far end bone cutting guide plate and an individualized femur multi-surface bone cutting suite. By adopting individualized design, removing influences of articular cartilages and adopting a flexion gap balance technology, bones can be cut more accurately, and a surgeon can be effectively assisted to improve the quality and efficiency of osteotomy.

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.

A device for positioning a tibial tunnel during ACL reconstruction is provided. The device includes a portion insertable into a pre-formed opening in the femur. Also provided is a method for positioning a tibial tunnel during ACL reconstruction. The method includes the steps of forming an opening in a femur bone, inserting a portion of a device into the opening, and using the device to position an opening in a tibia bone.

The embodiment of the invention provides a total knee arthroplasty preoperative planning method and device, and the method comprises the steps: obtaining a knee joint X-ray film image, and determining the real size of the knee joint X-ray film image; inputting the knee joint X-ray film image into a neural network identification model for identification, and determining key points and key axes; determining femur size parameters and tibia size parameters based on the key points and the key axes; determining types and models of a thighbone prosthesis and a tibia prosthesis based on the thighbone size parameter and the tibia size parameter; and based on the key axis, the type and the model of the femoral prosthesis and the type and the model of the tibia prosthesis, determining placement positions and placement angles corresponding to the femoral prosthesis and the tibia prosthesis. Therefore, according to the embodiment of the invention, the cost can be saved, the randomness of manual measurement is avoided, and an important reference function is provided for calculation of various parameters and placement of the prosthesis, so that the dependence on a surgeon is reduced.

A method for imparting tension across a human knee joint which includes a femur bone, a tibia bone, a patella bone, a patellar tendon, and ligaments, wherein the ligaments and patellar tendon are under anatomical tension to connect the femur and tibia together, creating a load-bearing articulating joint. The method includes: providing a tensioning device, including: a baseplate; a top plate; and a linkage interconnecting the baseplate and the top plate and operable to move the tensioning device between retracted and extended positions, wherein the top plate is pivotally connected to the linkage so as to be able to freely pivot about a pivot axis; positioning the tensioning device between the femur and the tibia; applying an actuating force to the linkage to move the tensioning device towards the extended position, so as to impart a controlled separating force driving the femur and tibia apart to extend the ligaments.

A method and apparatus for cross checking points palpated with a localization device. Points corresponding to the palpated points are obtained from a preoperative image of an object such as an X-Ray of a tibia bone. During a surgical procedure, the accuracy of palpated points are determined based on the palpated points and corresponding points obtained from the preoperative image. If a palpated point is inaccurate, an indicator is generated to indicate the inaccuracy of the palpated point.