6 results about "Total knee replacements" patented technology

This application relates to a simulation training method for total knee arthroplasty prosthesis positioning and gap balancing, belonging to the field of simulation training technology. To provide a standardized and repeatable workflow for individualized planning of total knee arthroplasty surgery, this application provides a simulation training method for total knee arthroplasty prosthesis positioning and gap balancing. This method includes determining the amount of osteotomy on the posteromedial femoral condyle based on the thickness of the femoral prosthesis's posterior condyle; determining the rotational alignment parameters of the femoral prosthesis based on a femoral trochlea model to obtain a patellar trajectory that meets the requirements; determining the placement of the tibial prosthesis on the tibia with the knee joint model in a flexed state; and determining the placement of the femoral prosthesis on the femur with the knee joint model in an extended state. This method enables individualized planning of total knee arthroplasty surgery, precise prosthesis positioning, flexion-extension gap balancing, and standardized training of the surgical procedure, improving surgical accuracy and postoperative outcomes.

A surgical upper computer for a total knee arthroplasty, and a total knee arthroplasty system, in the field of surgical devices. The surgical upper computer includes a processor, and a memory storing which, when executed, enable the processor to execute operating modes of the surgical upper computer, where the operating modes include: exhibiting information to be input, the information to be input including a dynamic change range of a joint flexion angle, and a relationship between the joint flexion angle and a pushing force applied or a gap formed between a femur and a tibia; applying a pushing force during a process of dynamically adjusting the joint flexion angle, and acquiring corresponding relationship data between the pushing force and the gap; and visually exhibiting the corresponding relationship data. Accordingly, the force and gap between soft tissues in the total knee arthroplasty can be acquired and exhibited in a reasonable manner.

A trial guide for temporary placement on the distal end of a femur during revision of a knee joint includes instrument components that allow a surgeon to determine distal extension gaps and posterior extension gaps for balancing the revised implant, and adjustable handle components that allow the surgeon to translate a trial stem (830) and rotate using selected offset couplings (836) for the trial stem to ensure proper trial placement prior to the revision procedure. Reference markers (824) can be affixed to the body (802) or components of the trial guide to allow a surgical system to map the trial guide onto a reference frame of the surgery, such as a femoral reference frame, thereby allowing the surgical system to update a surgical plan and assist the surgeon in implementing the plan for the revision of the joint replacement.

The utility model discloses a tibia pad prosthesis assembly with an embedded metal column rod, and belongs to the technical field of medical instruments. The defect that in the prior art, long-term abrasion of a traditional tibia liner prosthesis assembly causes failure of a PS type prosthesis tibia liner stand column and further causes fracture of the tibia liner stand column is overcome. A main body structure of the tibia pad comprises a plastic cover cap, a metal column rod, a tibia pad main body and a base cover cap, the upper end of the metal column rod is provided with an inner taper hole used for being connected with the plastic cover cap in an assembled mode and an outer thread used for being connected with the base cover cap, and the tibia pad main body is provided with a tibia pad main body stepped hole and a bottom inner hole which are communicated with each other; an internal thread hole in threaded connection with the external thread is formed in the base cover cap, the metal column rod is assembled and connected with a tibia liner main body stepped hole in the tibia liner main body, and the base cover cap is assembled and connected with a bottom inner hole in the tibia liner main body. The total knee joint replacement device is mainly used for total knee joint replacement.

The invention relates to the technical field of knee joint rehabilitation apparatuses, and provides a joint rehabilitation apparatus after total knee replacement, aiming at solving the technical problems that the temperature of a compress bag cannot be adaptively adjusted according to the knee swelling degree of a patient by an existing ice compress device, and tiptoes of the patient cannot be trained while ice compress is performed on the patient. Comprising a base and a compress bag structure symmetrically arranged above the base, and further comprises a circulating temperature adjusting structure located between the base and the compress bag structure and used for adjusting the temperature of liquid in a compress bag; the pressure adjusting structure is located below the application bag structure, connected with the application bag structure and used for adjusting the water pressure in the application bag structure; and the tiptoe training structure is positioned above the base and is communicated with the circulating temperature adjusting structure. The temperature of the compress bag can be adaptively adjusted according to the knee swelling degree of a patient, tiptoes of the patient can be trained while ice compress is conducted on the patient, and more comprehensive and better rehabilitation training can be conducted on the patient.

The utility model discloses a multifunctional tibia pad test mold holder, and belongs to the technical field of medical instruments. The defect that in the prior art, during traditional total knee joint replacement, a tibia liner prosthesis test mold is high in cost is overcome. A main body structure of the device comprises a main body handle, a sliding block, a connecting column, a connecting piece, a thickness adjusting knob, a base test mold and a liner test mold, the sliding block is installed on the main body handle in a sliding mode, and the thickness adjusting knob penetrates through the main body handle and then is connected with the bottom of the sliding block; the lower end of the connecting column is installed in an installation hole in the sliding block, and the upper end of the connecting column penetrates through the conversion knob and then is connected with the connecting piece. The base test mold is installed at the end of the main body handle, the liner test mold is connected with the connecting piece, and the height H between the liner test mold and the base test mold is the thickness of the tibia liner test mold. The total knee joint replacement device is mainly used for total knee joint replacement.