19 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.

The invention discloses a femur posterior condyle osteotomy positioning device which comprises a base, a first distraction piece, a second distraction piece and a positioning piece, the base comprises a supporting part and a platform part, and the supporting part is used for being connected to the top end of a soft tissue pressure measuring device. The first distraction piece comprises a first distraction part capable of supporting the posterior condyle of the femur, and the second distraction piece comprises a second distraction part capable of supporting the posterior condyle of the femur. The positioning piece comprises a main body part and a third pivot shaft, at least two first nail holes are formed in the main body part, and the main body part is connected with the platform part through the third pivot shaft. The first distraction piece and the second distraction piece can independently support the inner side and the outer side of the thighbone posterior condyle, a user can conveniently adjust the height of the inner side and the outer side of the thighbone posterior condyle so that soft tissue tension of the inner side and the outer side of the knee joint can be balanced, the soft tissue does not need to be loosened in the positioning process, and the positioning accuracy is improved. The original mechanical property of the soft tissue can be kept.

The utility model relates to a total knee arthroplasty thighbone stable osteotomy guide plate and an osteotomy assembly, the total knee arthroplasty thighbone stable osteotomy guide plate comprises a guide plate main body, the guide plate main body is provided with a matching part, and the matching part comprises a fitting part capable of being matched with different parts of a thighbone; a posterior condyle osteotomy inspection groove and a guide plate positioning hole are formed in the top of the guide plate main body, and a far-end osteotomy groove is formed in the middle of the guide plate main body. The utility model can be adapted to the prosthesis of a personalized patient, avoids excessive tissue stripping, is convenient for doctors to use in an operation, and reduces the trauma of the patient.

A surgical registration tool including a bone engagement structure comprising a distal condyle abutment structure, at least one posterior condyle abutment structure, a side condyle abutment structure, and an anterior shaft abutment structure. The distal condyle abutment structure includes a distal planar surface. The at least one posterior condyle abutment structure includes at least one planar surface extending distally from the distal planar surface and positioned perpendicular to the distal planar surface. The side condyle abutment structure includes a planar surface extending distally from the distal planar surface and positioned perpendicular to the distal planar surface and the at least one planar surface. The anterior shaft abutment structure extends distally from the distal planar surface and terminates at a distal tip. The registration tool also includes a handle coupled to the engagement structure and extending proximally therefrom, and a tracker array configured to couple to the handle.

The present invention relates to a unicompartmental femoral prosthesis system and a unicompartmental femoral prosthesis. The unicompartmental femoral prosthesis system includes N unicompartmental femoral prostheses of gradually increasing size, wherein N ≥ 2, and the ratio of the anteroposterior diameter of each unicompartmental femoral prosthesis to the posterior condyle height of the unicompartmental femoral prosthesis increases as the size of the unicompartmental femoral prosthesis increases. The anteroposterior diameter is the maximum length of the unicompartmental femoral prosthesis in the horizontal direction, and the posterior condyle height is the maximum height of the unicompartmental femoral prosthesis in the vertical direction. The above-mentioned unicompartmental femoral prosthesis system is more in line with the human anatomical structure, reduces the problem of insufficient coverage and instability of the distal femur or the posterior femoral condyle, reduces the risk of postoperative pain in patients, and makes patients feel better after surgery.

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 utility model relates to the technical field of medical auxiliary instruments, in particular to a unicompartmental condyle replacement osteotomy guide plate. A main body part and a posterior condyle osteotomy part are arranged in the first direction, a positioning part is fixed to the main body part, the main body part and the positioning part are arranged in the second direction, a column hole is formed in the main body part, and the column hole is fixed to the positioning part. A first positioning hole and a second positioning hole are formed in the positioning part, the first positioning hole and the second positioning hole are arranged in the first direction, the second positioning hole is arranged close to the posterior condyle osteotomy part, a posterior condyle osteotomy groove is formed in the posterior condyle osteotomy part, and the second positioning hole is arranged close to the posterior condyle osteotomy part. The first positioning hole, the second positioning hole and the column hole are all through holes extending in the third direction, and the posterior condyle osteotomy groove penetrates through the posterior condyle osteotomy part in the third direction. The utility model aims to provide the unicompartmental knee arthroplasty osteotomy guide plate aiming at at least one technical problem related in the background technology.

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.

A surgical instrument includes a cutting block with a rear face configured to bear on a distal end face of a resected femur. The cutting block has a guide slot extending from the rear face to a front face. The guide slot is configured to receive and guide a saw blade. A reference foot is mountable on a lower face of the cutting block, and has an anteriorly oriented foot upper face that, in a mounted state of the reference foot, protrudes beyond the rear face and is configured to bear on posterior condyles of the femur. A probe is mountable on the cutting block, in a region of a block upper face lying opposite the block lower face, and has a probe tip which, in a mounted state of the probe, protrudes beyond the rear face and is configured to bear on an anterior face of the femur.

A surgical instrument for use in a knee joint replacement operation includes a reference block with a block rear face configured to bear on a resected femur, a stylus arranged on the reference block, a stylus tip configured to bear on the femur, and two reference feet that are spaced apart mediolaterally from one another and arranged on the reference block. Each reference foot has a foot upper face protruding beyond the block rear face. The foot upper faces are arranged in a common reference plane and are configured to bear on the femur. At least two reference bores extend from the block rear face. Each reference bore is configured to receive a reference pin. A compensation element is configured for form-fitting and / or force-fitting releasable connection to one of the reference feet. The compensation element has an upper face which comes to bear against a posterior condyle.

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 invention relates to the technical field of medical instruments, and discloses a knee joint prosthesis which comprises a bone trabecula inner model, one side of the bone trabecula inner model is provided with an anterior condyle side, the other side of the bone trabecula inner model is provided with a notch, the two ends of the notch of the bone trabecula inner model are provided with far-end sides, the upper surfaces of the far-end sides are provided with bone trabecula stand columns, and the upper surfaces of the far-end sides are provided with bone trabecula vertical columns. A posterior condyle side is arranged on one side of the far end side, a femoral condyle body is arranged on the side wall of the bone trabecula inner model, a stand column is arranged in the bone trabecula stand column, a femoral component surface is arranged on one side of the posterior condyle side, and a femoral component surface is arranged on the outer wall of the femoral component surface. By means of the thighbone side prosthesis, better fusion of the thighbone side prosthesis and bone tissue is achieved, bone ingrowth is promoted, and the long-term stable fixing effect is achieved. The problems that a traditional thighbone side prosthesis is poor in long-term stability and prone to loosening, and a friction interface is prone to abrasion are solved, the service life of the prosthesis is prolonged, and the life quality of a patient is improved.

In TKA, after the posterior cut surface is formed, a spacer is placed on the posterior cut surface (e.g., directly thereon, or sandwiched between the posterior cut surface and the tibia, plateau or tibia, cut. surface) to replace the removed posterior condyles in order to use the manufacturer's sizing guide to: (i) determine an appropriate implant size; and / or (ii) determine the location for mounting the 4-in-1 block on the distal cut surface to align the 4-in-1 cut block in the correct POSE to guide the formation of the remaining cut surfaces to accommodate the determined implant size. The thickness of the spacer may replicate (or matches) the thickness of the femoral implant posterior thickness or the thickness of the removed posterior condyles. The spacer may have an adjustment, mechanism to account for the posterior thickness of different implant lines or the thickness of the removed posterior condyles.

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 belongs to the technical field of medical instruments, and discloses a knee joint flexion malformation thighbone far-end cutting guiding osteotomy plate which comprises a first osteotomy device and a second osteotomy device which are connected. A first positioning hole is formed in the first osteotomy device, and a distal femur osteotomy hole is formed in the first osteotomy device; a fixing plate is arranged on the second osteotomy device, an adjusting device is arranged on the fixing plate, a first guide device and a second guide device are symmetrically arranged on the adjusting device, and the first guide device and the second guide device jointly complete osteotomy positioning of the distal femur. The first osteotomy device is used for osteotomy of the distal femur, the second osteotomy device is used for osteotomy of the posterior condyle osteotomy direction, the retroflex osteotomy direction, the front femur osteotomy direction and the anterior-flex osteotomy direction, individual requirements of patients can be met, and meanwhile the problem that a traditional osteotomy surgical instrument is single and cannot be adjusted is solved.

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.