9 results about "Posterior condyle" patented technology

This invention belongs to the field of medical device technology and discloses a distal femoral osteotomy guide plate for treating knee flexion deformity. It includes a first osteotomy device and a second osteotomy device connected together. The first osteotomy device has a first positioning hole and a distal femoral osteotomy hole. The second osteotomy device has a fixation plate with an adjustment device. The adjustment device has symmetrically arranged guide devices one and two, which together position the distal femoral osteotomy. This invention uses the first osteotomy device to perform distal femoral osteotomy, and the second osteotomy device to perform osteotomy in the posterior condyle, posterior oblique, anterior femoral, and anterior oblique directions. This can meet the individualized needs of patients and solve the problem of traditional osteotomy instruments being singular and unadjustable.

This invention provides a fixation device and assembly method for pericondylar fractures of the knee joint prosthesis. The knee joint prosthesis includes a femoral condyle, a tibial plateau, and a tibial pad. The femoral condyle includes an anterior condyle, two posterior condyles, and an intercondylar fossa. A fixation device is installed in the intercondylar fossa, comprising an intramedullary fixation pin and a connecting fixation block. The connecting fixation block is installed within the intercondylar fossa and engages with the force-applying end of the intramedullary fixation pin. The connecting fixation block includes a main body with a top surface facing the tibial pad and a bottom surface opposite the top surface. The bottom surface extends away from the top surface to form a protrusion, and a through hole is formed within the protrusion, which is used to accommodate and fix the force-applying end of the intramedullary fixation pin. This invention embeds the entire connecting fixation block within the intercondylar fossa, fully utilizing the existing intercondylar fossa space of the PS-type prosthesis to establish a precise channel for the intramedullary fixation pin, thereby fixing the pericondylar fracture through structural fit.

The utility model discloses a mixed fixing type joint prosthesis assembly, belongs to the technical field of joint prostheses, and is designed for solving the problems that a joint prosthesis in the prior art is loosened and even falls off and the like. The utility model discloses a mixed fixing type joint prosthesis assembly which comprises a joint prosthesis which is an arc-shaped face, and the inner concave face of the joint prosthesis comprises a posterior condyle area and a main body area. The biological material layer covers at least part of the posterior condyle area, and the biological material layer is used for forming bone ingrowth between the biological material layer and the to-be-connected bone. According to the mixed fixing type joint prosthesis assembly, the stability of connection is improved through bone ingrowth formed between the biological material layer and the skeleton to be connected, and the problem that in the prior art, bone cement in the posterior condyle area cannot reach the effective penetration depth, and consequently a joint prosthesis is loosened and even falls off from the skeleton of the human body is solved; connection between the joint prosthesis assembly and the to-be-connected skeleton is more stable, and the use experience is better.

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.

The invention discloses a thighbone posterior condyle osteotomy measuring instrument which comprises a measuring scale, a sleeve, a supporting assembly and a locking assembly. The sleeve is arranged outside the measuring ruler in a sleeving mode, a clamping groove is formed in the sleeve, and one end of the inserting piece is inserted into the clamping groove; the supporting assembly is arranged at the bottom of the measuring ruler, and the supporting assembly and the inserting piece are arranged in the same direction; a lifting rod is arranged at the top of the measuring scale, and the locking assembly is installed on the outer wall of the sleeve and connected with the lifting rod. Therefore, the preset osteotomy height of the posterior condyle of the femur can be accurately measured, the accuracy of the osteotomy position is accurately evaluated before osteotomy, timely remedial measures are provided for an operator by perfecting a feedback mechanism of the four-in-one osteotomy guide plate, and finally the accuracy of osteotomy operation is improved.

The application provides a knee joint prosthesis periprosthetic fracture fixation device and an assembling method. The knee joint prosthesis comprises femoral condyles, a tibial plateau and a tibial pad. The femoral condyles comprise an anterior condyle, two posterior condyles and an intercondylar fossa. The fixation device is installed at the intercondylar fossa. The fixation device comprises an intramedullary fixation needle and a connecting fixation block. The connecting fixation block is installed in the intercondylar fossa. The connecting fixation block is connected with the force applying end of the intramedullary fixation needle. The connecting fixation block comprises a main body. The main body has a top surface facing the tibial pad and a bottom surface opposite to the top surface. The bottom surface extends in a direction away from the top surface to form a protruding part. A through hole penetrating through the main body is formed in the protruding part. The through hole is used for accommodating and fixing the force applying end of the intramedullary fixation needle. The whole connecting fixation block is embeddedly installed in the intercondylar fossa. The original intercondylar fossa space of the PS type prosthesis is fully utilized to establish a precise channel of the intramedullary fixation needle. The periprosthetic fracture is fixed through structural cooperation.

The invention provides a robot system, a computer readable storage medium and a control device, and the system comprises an object platform which is used for placing a target object; the measuring and positioning device is used for measuring mounting and positioning geometric structure parameters of the all-in-one osteotomy plate; the mechanical arm is used for intercepting the distal end face of the femur of the target object according to the distal end face osteotomy thickness and the reference datum point and carrying out installation hole positioning, punching operation and osteotomy plate installation according to the installation positioning geometric structure parameters and the posterior condyle reference datum plane; the all-in-one osteotomy plate is used for conducting femur posterior condylar face osteotomy, anterior condylar face osteotomy, anterior inclined face osteotomy and posterior inclined face osteotomy on a target object. By means of the scheme, accurate and efficient knee joint replacement osteotomy can be achieved without the need for a prosthesis company to authorize complete prosthesis geometric model parameters.

The utility model relates to the technical field of medical instruments, and discloses a unicondylar joint thighbone 3D printing guide plate which comprises a guide plate body, a thighbone far-end prosthesis far-end locking hole is formed in one side of the guide plate body, a thighbone far-end prosthesis near-end locking hole and a guide plate fixing hole are formed in one side of the guide plate body, and the outer side of the guide plate is clamped and pressed. The knee joint CT scanning 3D guide plate is reasonable in structure, knee joint CT scanning is performed before an operation, the 3D guide plate is designed, and template clamping and pressing are performed by clamping and pressing the outer side of the guide plate, clamping and pressing the inner side of the guide plate and clamping and pressing the thighbone posterior condyle during use. After a butt joint template is prepared to be clamped and pressed before an operation, a kirschner wire is driven into a guide plate fixing hole to fix and reinforce the stability of the guide plate body, the guide plate body is prevented from loosening in the osteotomy process, a bent pry is used for protecting inner side collateral ligaments on the outer side in the thighbone posterior condyle osteotomy groove thighbone posterior condyle cutting operation, and the inner side is of a closed structure to protect anterior and posterior cruciate ligaments. By means of the design, the swing saw can effectively move in the osteotomy process, and ligaments and surrounding tissue can be prevented from being damaged.

The invention provides a readable storage medium and an orthopedic robot system, a program is stored on the readable storage medium, and when the program is executed, the following steps are realized: setting feature reference points on a preoperative medical image or a three-dimensional model of a target femur based on public parameters of a femoral prosthesis so as to determine osteotomy references of a distal end surface and a posterior condylar surface; osteotomy of the far end face and the posterior condyle face is executed on the target femur, and a far end osteotomy face and a posterior condyle osteotomy face are formed; based on the posterior condyle osteotomy surface, a positioning and guiding device is installed, and the positioning and guiding device is made to be attached to the posterior condyle osteotomy surface; an osteotomy plate is installed on the positioning and guiding device in a matched mode, and the osteotomy plate is made to abut against the far-end osteotomy face; based on the guidance of the osteotomy plate, osteotomy of the anterior condyle face, the anterior inclined face and the posterior inclined face is completed. By means of the configuration, the method is not limited by complete geometric parameters of the knee joint prosthesis authorized by a prosthesis product company, open type knee joint prosthesis interchange selection can be achieved, and the method is not limited by using prosthesis products of specific brands.