11 results about "Femur tibia" patented technology

Bone and joint surface reconstruction methods are disclosed for the therapeutic amelioration of joint defects caused by various conditions, injuries, and diseases to help eliminate or reduce pain and return the joint to its proper bio-mechanical function without the need to replace fully or partially the anatomical joint. The joint may specifically include mammalian joints such as the femorotibial joint, for example. The methods disclosed herein leverage the significant role the subchondral bone plays in the health status of the afflicted joint.

The present application relates to the technical field of medical image processing, and provides a knee femur and tibia segmentation method based on region growing, comprising the following steps: S1, acquiring knee medical images; S2, selecting a growth seed point; S3, coarsely segmenting the knee medical images to obtain knee stem data; S4, finely segmenting the knee medical images to obtain knee connection data; S5, fusing the knee stem data and the knee connection data to obtain knee femur and tibia image data with complete contours; S6, coarsely filling the knee femur and tibia image data to obtain knee femur and tibia image data after coarse filling; and S7, iteratively filling holes in the knee femur and tibia image data by using a three-dimensional sliding window, so as to obtain image data that is consistent with the surrounding data in shape, position and completeness and smoothness. The present application solves the problems of slow segmentation speed, unstable segmentation effect, incomplete segmentation and adhesion in preoperative planning of knee replacement surgery.

A femur-first orthopaedic surgical procedure may include using a surgical navigation system to perform one or more initial measurements on a femur of a patient, a tibia of the patient, or both and to develop a surgical plan for the orthopaedic surgical procedure based on the one or more initial measurements, performing a first resection of the femur, using the surgical navigation system to perform one or more later measurements of the tibia that were inaccessible prior to the first resection of the femur and to confirm the surgical plan based on the one or more later measurements of the tibia, performing a tibial resection of the tibia based on a planned tibial resection plane of the surgical plan after confirming the surgical plan, and performing additional resections of the femur based on planned femoral resection planes of the surgical plan after confirming the surgical plan.

A method of evaluating a knee joint which includes a femur, a tibia, and ligaments, includes: inserting into a lateral or medial compartment of the joint a tensioner-balancer having apparatus for applying distraction force; moving the joint within its range of motion; maintaining a predetermined distraction load range or a predetermined distraction height range; collecting distraction height and force data of the femur relative to the tibia; deriving ligament displacement and load data from the height and force data; processing the data to produce a digital geometric model of the joint, the model including a ligament force versus displacement characterization curve for each of a plurality of flexion angles of the femur relative to the tibia; using a software application, evaluating the digital geometric model and selecting a portion of the curve that represents a predetermined desired level of ligament tautness; and storing the digital geometric model.

A method of evaluating a human knee joint including a femur bone, a tibia bone, and ligaments. The method includes: inserting into the joint a tensioner-balancer that includes at least one force sensor; providing an electronic receiving device; moving the knee joint through at least a portion of its range of motion; using the electronic receiving device to collect data from the at least one force sensor; processing the collected force data to produce a digital geometric model of the knee joint, wherein the data includes: a medial spline representing a locus of points of contact of a medial condyle of the femur F with the tensioner-balancer, over a range of knee flexion angles; and a lateral spline representing the locus of points of contact of the femur F with the tensioner-balancer, over a range of knee flexion angles; and storing the digital geometric model for further use.

The invention discloses an anti-retreating intramedullary nail, and relates to the technical field of intramedullary nails. The anti-retreating intramedullary nail comprises a main nail body, the main nail body is arranged in a marrow cavity along a femur and a tibia axis, an anti-falling part is arranged at the top of the main nail body, and the anti-falling part is in bent transition connection with the main nail body; a hollow channel is formed in the anti-falling part and the main nail body, a fixing needle is arranged in the hollow channel in a penetrating mode, the fixing needle is a kirschner wire which is commonly used in clinic and has different diameters, and the tail end of the fixing needle can be bent. The nail has the beneficial effects of preventing the nail from falling off and rotating, improving the operation operability, increasing the stability in a marrow cavity and the like. The device can provide a better treatment effect and promote the rehabilitation of a patient in a fracture repair operation.

The adjustable knee rehabilitation brace comprises a rigid supporting framework, an active adjusting module and a flexible follow-up structure, and the rigid supporting framework comprises a thigh support for fixing thighs, a shank support for fixing shanks and a composite hinge mechanism for connecting the thigh support and the shank support. According to the technical scheme, through collaborative design of the composite hinge mechanism, the first angle adjustor and the second angle adjustor, independent and accurate adjustment of a sagittal plane and a frontal plane is achieved, the knee joint varus or valgus force line can be corrected, more complex rehabilitation requirements are met, the bionic air bag array is controlled through three-area independent pressure, and the rehabilitation effect is good. The pressure distribution of a femur-tibia articular surface can be dynamically matched, the risk of secondary injury is effectively reduced, static fixation of the brace is changed into dynamic self-adaptive support, the pressure distribution is adjusted in different activity states, the comfort and the wearing compliance are remarkably improved, and proprioceptive recovery is possibly promoted through pressure feedback.

The utility model relates to the technical field of experimental injection, in particular to a device suitable for thighbone and tibia injection of experimental animals, which comprises an injection cylinder placing seat, an arc-shaped groove is arranged at the top end of the outer wall of the injection cylinder placing seat, and an injection cylinder main body is arranged at the top end of the outer wall of the injection cylinder placing seat through the arc-shaped groove. The left side of the outer wall of the syringe body is connected with a piston rod in a sliding mode, the right end of the syringe body is communicated with a sliding barrel, the outer wall of the sliding barrel is connected with a sleeve in a sliding mode, and the right side of the outer wall of the syringe containing base is provided with a backward moving component enabling the sleeve to move backwards. A piston rod is extruded through a push rod and a push plate, so that in the liquid discharging process of a needle head, a movable seat is pulled to move through an electric control telescopic rod, the movable seat can drive a sleeve and the needle head to move backwards in the liquid discharging process, and therefore the situation that liquid is sprayed and overflows due to the fact that the internal pressure of the thighbone and the tibia is too large in the liquid injection process can be prevented.

The invention discloses an artificial ligament for cruciate ligament reconstruction, which relates to the technical field of artificial ligaments, and comprises a ligament main body, two ligament support sheaths and two extrusion screws, the ligament body comprises a free section and two longitudinally and transversely woven sections, the ligament body, the free section and the longitudinally and transversely woven sections are all in a circular ring shape, the free section is located between the two longitudinally and transversely woven sections and provided with a plurality of free ligament strips, the longitudinally and transversely woven sections are formed by staggering a plurality of transverse woven strips and longitudinal woven strips, and the end of each free ligament strip is connected with one transverse woven strip and one longitudinal woven strip. Traction members are arranged at the ends, away from the free sections, of the longitudinal-transverse weaving sections A plurality of staggered grooves are formed in the outer side walls of the ligament supporting sheaths, one ends of the ligament supporting sheaths are of an expandable multi-valve structure, internal threaded holes are formed in the ligament supporting sheaths, and the two ligament supporting sheaths are correspondingly arranged in a femur tunnel and a tibia tunnel respectively. The outer side wall of the extrusion screw is provided with an external thread which can be connected with the internal threaded hole and drive the multi-petal structure to open and extrude the inner wall of the bone tunnel. The risk of postoperative ligament loosening can be reduced, and the long-term curative effect of a ligament operation is improved.

The invention discloses an auxiliary distraction device for knee joint surgery, and relates to the technical field of medical auxiliary instruments, the auxiliary distraction device comprises a holding part, a rotating shaft, two distraction arms and a self-adaptive supporting mechanism, and the self-adaptive supporting mechanism comprises a fulcrum block; the force transmission assembly is arranged in the distraction arm, connected with the fulcrum block and used for converting the extrusion force borne by the fulcrum block into linear displacement; and the force feedback assembly is connected with the force transmission assembly and is used for detecting the extrusion force and visualizing the numerical value of the extrusion force. The multiple fulcrum blocks form effective surface contact, concentrated force is dispersed to the multiple supporting points, the peak value of the pressure intensity of the surfaces of the thighbone and the tibia is greatly reduced, the fulcrum blocks are automatically attached to the complex contours of the surfaces of the tibia and the thighbone, then uniform and soft supporting is provided, and through the force feedback assembly, the supporting effect is good. The extrusion force of the fulcrum block on the knee joint tissue can be visualized, and the degree of dependence on doctor experience is reduced.

The application discloses a kind of osteotomy plane boundary control method, electronic equipment and storage medium, the method is by calculating the distance of the center point of osteotomy swing saw to the boundary line of osteotomy plane, the weighted sum of the inward vector of the two edges with the shortest distance is selected, as search direction, step search is carried out, to quickly find the nearest position boundary of plane (i.e. it is in accordance with the desired motion direction and attitude) and in the safe position of plane boundary, the safe position is subsequently issued to mechanical arm, and the surgical tool is moved, and then accurately and safely help the doctor to realize the osteotomy operation of femur and tibia. The technical problem that soft tissue and ligament injury, surgical precision is reduced due to the too large movement range of osteotomy swing saw in the prior art is solved.