47 results about "Femur" patented technology

An intraoperative surgical system for knee arthroplasty may be configured and / or reconfigurable to allow the surgical system to be inserted into different sized joint spaces during a surgical procedure. For example, the surgical system may include a sensor support body defining a platform, a force sensor, and a plurality of sensor covers each being configured to be detachably attached to the sensor support body. Each of the sensor covers can vary from each other in at least one characteristic. A selected one of the sensor covers can be placed over the platform, sandwiching the force sensor between the platform and sensor cover, to define a joint insertion block configured to be inserted into a tibiofemoral joint for measuring a force between a tibia and a femur defining the tibiofemoral joint.

A combination of a first assembly for guiding resection of a femur and tibia of a knee joint and a second assembly including femoral and tibial knee components. The combination of the first assembly and the second assembly provides optimal placement and positioning of the femoral and tibial knee components to achieve near-normal knee kinematics and tension. The preparation for and placement of the prosthetic knee components provides medial-pivoting kinematics mimicking that of the natural knee thereby promoting improved outcome for the patient.

The invention relates to a surgical device for performing a controlled resection of the neck of a femur during a hip replacement procedure. The surgical device comprises a template comprising an aperture dimensioned for receiving a femoral head of the femur, and a frame comprising a resection guide for indicating a resection plane on the femoral neck. The femoral neck has a femoral neck axis. The frame is slidably connected to the template for positioning of the resection guide along the femoral neck axis while the template is mounted on the femoral head.

The invention discloses an intelligent joint replacement revision operation system and method based on CBCT and optical navigation, and the system comprises an imaging device which is used for collecting the positive and lateral two-dimensional images of a femur region and an ankle joint region of an affected limb and the three-dimensional image of a knee joint region, and reconstructing the three-dimensional models of the femur and the tibia; the optical tracking equipment is used for acquiring poses of the first tracing equipment and the second tracing equipment in real time; the key point acquisition module is used for acquiring three-dimensional positions of a femoral head central point and an ankle joint central point in the positive and lateral two-dimensional image and acquiring femoral inner and outer upper condyle points and a tibia marrow cavity point in the three-dimensional model; the affected limb section extraction module is used for obtaining the far-end section, the anterior section and the posterior section of the femur in the knee joint area and the plateau section of the tibia in the knee joint area; and the planning execution module is used for determining the target pose of the new implant according to the corresponding section, and performing planning execution according to the target pose. According to the invention, the accuracy and safety of the joint replacement revision operation can be improved.

A method to facilitate a robotic total knee arthroplasty includes performing a plurality of femoral cuts on a femur, the performing the plurality of femoral cuts including performing a distal femoral cut of the plurality of femoral cuts, performing an anterior femoral cut of the plurality of femoral cuts, performing an anterior chamfer cut of the plurality of femoral cuts after the performing the distal femoral cut and the performing the anterior femoral cut, and performing a posterior femoral cut of the plurality of femoral cuts after performing all other femoral cuts of the plurality of femoral cuts. The method further includes performing at least one tibial cut on a tibia after the performing the plurality of femoral cuts on the femur.

The invention discloses a tibia unicompartmental prosthesis, a femur unicompartmental prosthesis and a knee joint unicompartmental prosthesis component, the tibia unicompartmental prosthesis comprises a first mounting surface, and the first mounting surface is used for being mounted to a tibia osteotomy surface; the first mounting surface is provided with a first bone cement area and a first porous area; the first bone cement area is used for being fixed to the front side of the tibia osteotomy surface, and a first bone cement groove is formed in the first bone cement area and used for containing bone cement; the first porous area is used for being fixed to the rear side of a tibia osteotomy surface, the first porous area is provided with a first porous structure, and pores for bone ingrowth are formed in the first porous structure. In the application, the front side of the corresponding unicompartmental prosthesis is fixed through the bone cement, and the rear side of the corresponding unicompartmental prosthesis is fixed through the porous structure, so that the mounting stability of the corresponding unicompartmental prosthesis can be improved.

Systems and methods receive pre-operative, volume data for a patient's pelvis and a femur. A three-dimensional (3D) model is generated of the patient's pelvis and femur. A hologram of the patient's native hip is generated from the 3D model. The patient's pelvis is registered relative to a pelvic coordinate system. The hologram is displayed and the patient is aligned with the hologram. The 3D coordinates of a selected point on the femur is determined relative to the pelvic coordinate system. Following implantation of prosthetic hip components, the hologram of the patient's native hip is displayed again and the patient is aligned with the hologram. The 3D coordinates of the selected point on the patient's femur are again determined. One or more changes to leg length, offset, or Anterior-Posterior (AP) position are determined based on the two 3D coordinates determined for the selected point. The one or more changes to leg length, offset, or Anterior-Posterior (AP) position are displayed

A system for balancing a knee of a patient includes a force measurement device configured to measure forces between a femoral bone and a tibia bone as a force is applied to the knee and a computing system configured to determine a separation distance between a point or region associated with the femur and a point or region associated with tibia based on force information from the force measurement device. The force measurement device may include at least one paddle configured for placement between the femur and tibia and including at least one force sensing element for sensing forces associated with the femur or tibia. The computing system may be configured to normalize a measured force and identify the separation distance based on the normalized force, wherein the identified separation distance is substantially the same over a range of forces measured by the force measurement device.

A surgical instrument system for use in a total knee arthroplasty includes a reference block that is attachable to a femur. The reference block has a block front side and a block rear side lying opposite the block front side. At least one compensation element has an element rear side and, lying opposite along the proximal-distal axis, a contact face for contacting a lateral condyle and / or medial condyle. A connection system has at least one connection portion on the reference block. At least one complementary connection portion is disposed on the compensation element. The connection system is configured to releasably attach the compensation element on the block front side. The compensation element in the attached state does not completely cover the block front side. The connection system is configured so that the compensation element is attachable in different positions on the block front side by the connection system.

Knee joint biomechanics and kinematics simulation machine, including frame, ankle joint simulation device, tibia fixing device, patellar tendon fixing device, hip joint simulation device, quadriceps femoris fixing device and femur fixing device; the ankle joint simulation device is arranged at the bottom of the frame, the ankle joint simulation device is connected with the tibia fixing device, the tibia fixing device is connected with the femur fixing device, the femur fixing device is connected with the hip joint simulation device, and the hip joint simulation device is arranged on the frame; the tibia fixing device and the femur fixing device are provided with the patellar tendon fixing device at the connecting position; the hip joint simulation device and the femur fixing device are provided with the quadriceps femoris fixing device at the connecting position. The invention provides a knee joint biomechanics and kinematics simulation machine to simulate the working condition of the lower limbs of human body under physiological activity conditions such as walking and squatting, and test and research the biomechanics and kinematics of natural knee joints and artificial knee joints.

A system for ligament balancing including a range-of-motion (ROM) tensor. The ROM tensor of the system includes a main body, first and second arms, a pin guide and a pin. The main body has an elongate guide. The first and second arms are rigidly attached to and extends laterally from the main body and configured to be placed over an uncut tibia and below an uncut femur. The pin guide is slidably coupled to the elongate guide and has a through-hole for receiving the pin. The ROM tensor is designed to pivot about the pin while the tibia moves through its range of motion while the femur preferably remains stationary. A navigation system monitors the position of the tibia and femur as the tibia moves and the gap information derived from the position monitoring is displayed on a display device.

The invention discloses a bionic knee joint testing device based on medical image personalized reconstruction, and belongs to the technical field of humanoid tests.The bionic knee joint testing device is provided with a bionic knee joint base body, the base body comprises a thighbone end connector, a middle rotating shaft, a base and a tibia end connector, and the middle rotating shaft comprises a horizontal rotating cylinder and a vertical rotating shaft which are perpendicular to each other; a horizontal rotating shaft is arranged in the horizontal rotating cylinder; a first bearing is arranged at the end of the horizontal rotating shaft and fixedly connected with the thighbone end connector, and a simulation cartilage is arranged at the lower end of the connecting position of the first bearing and the thighbone end connector. A through hole is formed in the middle of the base, and the vertical rotating shaft is arranged in the through hole; a simulation meniscus is arranged at the upper end of the base, and the upper surface of the simulation meniscus is in contact with the lower surface of the simulation cartilage; the lower portion of the base is connected with the tibia end connector. The bionic knee joint pressure measuring dummy disclosed by the invention can realize physiological coupling motion simulation of the knee of a human body.

The application discloses a kind of based on knee joint motion mechanism's bionic joint mechanism, belong to bionic mechanical technical field.The bionic joint mechanism includes two bars four cable tensioning support units symmetrically arranged on two sides, is set in two bars four cable tensioning support unit between femur contour movement subassembly, with the femur contour movement subassembly and two bars four cable tensioning support unit cooperation setting bilateral linkage mechanism and drum wheel curved surface cooperation mechanism.The application can simulate the motion characteristics in the process of knee joint flexion by setting femur contour movement subassembly, improve the bionics and motion coordination of mechanism;By two bars four cable tensioning support unit and bilateral linkage mechanism, the mechanism has support ability and adaptability in the process of movement, ensure the consistency of two sides movement.The mechanism has the advantages of compact structure, linkage reliable, motion coordination, and can be applied to bionic robot, exoskeleton device and other related bionic mechanical system.

The application discloses a child tibia tumor type rotary hinge knee joint prosthesis and belongs to the medical instrument field, which comprises: a femur end prosthesis, a tibia pad and a bionic joint connecting piece. The femur end prosthesis comprises a positioning plate body, the positioning plate body is provided with a connecting part and a butt joint rod, the tibia pad is detachably connected with the positioning plate body and is provided with a concave arc joint surface, the bionic joint connecting piece is provided with a butt joint hole and a rotating pin, the butt joint hole is movably connected with the butt joint rod through a ligament bionic mechanism, the bionic joint connecting piece is allowed to rotate around the butt joint rod and is allowed to reciprocate along the axis of the butt joint rod within a set distance range, and the ligament bionic mechanism generates an elastic restoring force when the bionic joint connecting piece and the butt joint rod relatively displace, the tibia end prosthesis is provided with a connecting hole and is rotatably connected with the rotating pin through the connecting hole, and the tibia end prosthesis is further provided with a convex arc joint surface. Through the above arrangement, the tibia end prosthesis is allowed to rotate around the butt joint rod and the rotating pin respectively, so that the internal and external rotation actions and the flexion action of the lower leg are realized.

The invention discloses a bionic joint mechanism based on a knee joint movement mechanism, and belongs to the technical field of bionic machinery. The bionic joint mechanism comprises two-rod four-cable tensioning supporting units symmetrically arranged on the two sides, a thighbone contour simulating movement assembly arranged between the two-rod four-cable tensioning supporting units, a double-side linkage mechanism and a drum wheel curved surface matching mechanism, wherein the double-side linkage mechanism and the drum wheel curved surface matching mechanism are matched with the thighbone contour simulating movement assembly and the two-rod four-cable tensioning supporting units. By arranging the thighbone contour imitating movement assembly, movement characteristics of the knee joint in the flexion and extension process can be simulated, and the bionic property and movement coordination of the mechanism are improved; and through the two-rod four-cable tensioning supporting units and the linkage mechanisms on the two sides, the mechanism has the supporting capacity and the adaptive capacity in the movement process, and the consistency of movement on the two sides is guaranteed. The mechanism has the advantages of being compact in structure, reliable in linkage and coordinated in movement, and can be applied to relevant bionic mechanical systems such as bionic robots and exoskeleton devices.

A system for estimating mechanical characteristics of soft tissue which is connected to a patient's patella during surgery on a knee joint which comprises a patella and a femur, comprises a memory device for data relating to the compressive load on a load sensor. The system also comprises a first load sensor having a first thickness for location between the patella and the femur, and a second load sensor having a second thickness for location between the patella and the femur, in which the second thickness is different from the first thickness. The memory device receives compressive load data from the first and second load sensors during flexion of the knee with the first or second load sensor located between the patella and the femur. The system also includes a processor device for calculating a measure of the extensibility of soft tissue connected to a patient's patella based on the effect on the measured compressive load of switching from the first load sensor to the second load sensor.

The utility model relates to the technical field of traction tripods, and discloses a reduction traction tripod based on hip and thighbone intertrochanteric fracture traction, which comprises a bottom frame, the top of the bottom frame is provided with a support adjusting component used for adjusting angles, the top of the support adjusting component is rotatably connected with a support component used for supporting joints, and the support component is provided with a traction component used for supporting joints. A positioning assembly used for positioning is arranged in the bottom frame. The supporting adjusting assembly comprises two first rotating rings, the interiors of the two first rotating rings are rotatably connected to the left side of the exterior of the bottom frame, the tops of the two first rotating rings are fixedly connected with first connecting rods, and the right side of the exterior of the bottom frame is slidably connected with two sliding rings. According to the utility model, the flexible adjustment of multiple angles of the tripod is realized, so that the angle of the tripod can be accurately adjusted according to the specific physical conditions of different patients, the fracture parts of the patients can be better fitted in the traction process, and an ideal traction effect is achieved.

The utility model belongs to the technical field of medical instruments, and particularly relates to a femur reference frame which is mainly used in robot-assisted total knee arthroplasty and is mounted on a femur of a patient, so that a robot can accurately identify and position the femur. The fixing part is provided with a first axis in the height direction; the connecting rod is provided with a first end and a second end, the first end is connected with the fixing part, the second end is located above the first end in the extending direction of the first axis, and the distance between the second end and the first axis is larger than that between the first end and the first axis; the reference frame is arranged on one side of the connecting rod, and the distance between the reference frame and the first end is larger than that between the reference frame and the second end; the problems that when an existing reference frame is installed on the femur of a patient, a surgical incision needs to be increased or lengthened, and movement of a mechanical arm of a surgical robot is hindered are mainly solved.

The utility model relates to the technical field of medical auxiliary instruments, in particular to a knee joint angle measurer which comprises a connecting piece, a first fixing piece, a second fixing piece and a third fixing piece, the connecting piece is arranged on the second fixing piece, one end of the connecting piece is connected with the first fixing piece, and the other end of the connecting piece is connected with the third fixing piece; the length of one end of the connecting piece is adjustable, so that one end of the connecting piece keeps straight and is parallel to a first straight line, and the length of the other end of the connecting piece is adjustable, so that the other end of the connecting piece keeps straight and is parallel to a second straight line; the included angle between one end and the other end of the connecting piece is the included angle between the thighbone and the tibia of the patient. In the application, one end of the connecting piece is taken as the reference datum of the femur axis of the patient, and the other end of the connecting piece is taken as the reference datum of the tibia axis of the patient, so that the influence of the body shape of the patient is avoided, the measurement precision is improved, and accurate reference data is provided for a treatment scheme of a doctor.

The embodiment of the invention discloses an intelligent sickbed control system based on femur detection. A specific embodiment of the system comprises an X-ray machine configured to acquire femur image data; a data processor configured to execute the following steps: performing image detection processing on femur image data received from the X-ray machine; performing gray mapping processing on the femur image data; obtaining standardized femur image data; performing instance segmentation processing on the standardized femur image data; carrying out key point detection processing on the femoral ash degree image data to obtain coordinate data of each key point; generating a thighbone detection result; and the intelligent sickbed controller is configured to control the intelligent sickbed to execute a position adjustment task based on the thighbone detection result. According to the embodiment, the frequency of occurrence of system jamming or no response can be reduced.

Systems and techniques can be provided to generate sensorized insights into the characteristics of a knee joint space during a knee replacement procedure. In some implementations, a sensor support body carrying one or more sensors can be used to measure and inform the clinician of the varus / valgus angles of the tibia and femur, allowing the clinician to adjust the surgical procedure to accommodate the measured angles. The clinician may simulate changes to the load balance across the knee joint in response to potential dimensional changes to the knee joint prior to actually surgically implementing the changes.

The invention discloses a construction method and application of a calculation model of varus knee joint contact stress, and the method comprises the steps: setting a femur and femur cartilage of a knee joint as first elastomers, setting a tibia and tibia cartilage as second elastomers, respectively setting a high-elasticity-modulus layer and a low-elasticity-modulus layer, applying a normal force to the high-elasticity-modulus layer and introducing a modification coefficient, obtaining the corrected contact radius and peak pressure, and constructing a dynamic equilibrium equation of the introversion knee joint; adding meniscus parameters, and constructing a peak contact stress model of double contact areas of the introversion knee joint; constructing a strain function for the low-elastic-modulus layer by adopting a Yeoh model to obtain the elastic modulus of the meniscus material during large strain; inputting the image data, the introversion angle and the load parameters of the subject into the mathematical model of the peak contact stress of the knee joint, comparing the obtained analytical solution with the numerical solution of the finite element model, and if the analytical solution is within a preset range, proving that the mathematical model is correct, and applying the mathematical model to the optimization application of the artificial meniscus and the knee joint prosthesis.

This application discloses an automatic analysis method for CT images of long bones in mice and rats, relating to the field of image processing technology. The method includes: acquiring a CT image sequence of the target long bone, extracting the three-dimensional spatial distribution of bone tissue, and performing pose alignment and three-dimensional cropping to obtain a standardized bone image sequence; then constructing candidate depth intervals based on butterfly-shaped anatomical features and key points of growth plate strip-shaped gaps, respectively, and obtaining a fine search range through intersection operation; subsequently identifying candidate slices of triangular fractures and determining the anatomical zero point; finally, mapping the target analysis region based on the anatomical zero point, completing cortical bone segmentation, medullary cavity segmentation, and trabecular bone extraction under closed mask constraints, and outputting quantitative parameters of bone tissue. This application achieves accurate positioning of the growth plate and unified analysis region mapping in long bone CT images, improving the accuracy of trabecular bone extraction and the consistency of bone tissue quantification results.

A method of positioning posterior resection guides in a three-dimensional coordinate system using robotic arms to perform partial knee arthroplasties comprises connecting a first tracking device for a surgical tracking system of the robotic arm to a femur, connecting a second tracking device for the surgical tracking system of the robotic arm to a tibia, manually positioning the tibia relative to the femur to a desired orientation to perform a posterior resection, manually determining a position for the posterior resection guide to perform the posterior resection, digitizing a reference point for the posterior resection guide in the three-dimensional coordinate system for a location of a feature of the posterior resection guide, moving the posterior resection guide to the location in the three-dimensional coordinate system with the robotic arm, and resecting a posterior portion of a condyle of the femur using the posterior resection guide to guide a cutting instrument.

This invention belongs to the field of medical device technology, specifically relating to an adjustable fixation and retraction device and its usage method for knee replacement surgery. It includes two supporting components, each comprising a guide rail with a horizontal bar slidably connected to it. A locking mechanism is located at one end of the horizontal bar near the guide rail, and a first vertical bar is fixedly mounted at the other end of the horizontal bar. A second vertical bar is fixedly mounted at the end of the guide rail away from the horizontal bar. Hoffman hooks are fixedly mounted at the lower ends of both the first and second vertical bars. These Hoffman hooks are used to hook the tibia and femur, respectively. This invention, by sliding the horizontal bar on the guide rail and using the locking mechanism, allows for stepless or graded adjustment of the distance between the first and second vertical bars on the same supporting component. The surgeon can quickly adjust the lateral span of the two Hoffman hooks according to the actual width of the patient's tibial plateau or femoral condyle, ensuring stable hooking at the optimal bony attachment point.

The present disclosure relates to a system for guiding an osteotomy procedure on a tibia and / or a femur pertaining to a patient's lower limb to correct a misalignment of said lower limb, wherein a tibial tracker is fixed to the tibia and a femoral tracker is fixed to the femur, said system comprising a control unit configured to be coupled to a localization system adapted to track a position and orientation of the tibial tracker and the femoral tracker, wherein the control unit is configured to: —receive at least one target alignment parameter of the lower limb provided by a user; —determine a position of a set of characteristic points on the tibia and / or the femur relative to the tibial tracker and / or the femoral tracker; —track the positions of said characteristic points relative to the tibial tracker and / or the femoral tracker based on localization data of the set of characteristic points during application of mechanical constraints by the user onto the patient's knee, said tracked positions forming a knee measurement data set; —based on the knee measurement data set, adjust a function defining a model of the patient's knee; —based on at least one output of said function and on at least one alignment parameter of the lower limb in the constrained position, determine at least one correction parameter of the osteotomy procedure to be applied to the lower limb to achieve the target alignment parameter.

The knee joint thighbone measuring device comprises a measuring frame, a measuring structure and a positioning mechanism, the lower end of a measuring rod is slidably inserted into a sliding groove, a probe is slidably connected with the upper end of the measuring rod, the probe is perpendicular to the measuring rod, and the measuring structure is arranged on the measuring rod. The surface of the probe is provided with a second scale mark along the length direction; the measuring frame is connected with a connecting plate in a sliding mode, the lower positioning plate is fixedly connected with the connecting plate, and a locking structure used for fixing the connecting plate is installed on the surface of the measuring frame. The upper positioning plate abuts against the upper top of the gap, the lower positioning plate abuts against the lower end face of the gap, the space occupied by the gap is attached, the distance between the upper positioning plate and the lower positioning plate is adjusted according to the size of the thighbone and tibia buckling position gap, locking is conducted through the locking structure, insertion is stable and reliable, and the measurement stability is improved.

The invention provides a construction method and application of an osteoporosis mouse model, and the method comprises the following steps: taking a female mouse as a donor, carrying out bilateral ovariectomy, after feeding for 5-12 weeks after the operation, separating bone marrow cells of thighbone and tibia, and carrying out flow cytometry to obtain bone marrow mesenchymal stem cells and macrophages; the method comprises the following steps: taking a male mouse as a receptor, performing irradiation to remove self bone marrow cells, transplanting bone marrow mesenchymal stem cells and macrophages of an ovarian group donor through caudal vein within 24 hours, and feeding for 1.5-4 months after transplanting to obtain the osteoporosis mouse model. The osteoporosis mouse model can be used for preparing targeted drugs related to bone metabolism, especially drugs for preventing and / or treating osteoporosis.

The invention relates to a device (2) for performing a resection on a femur or tibia, in particular for performing a femur resection during the insertion of a hip prosthesis, comprising a rasping tool (4) that can be inserted into the femur and has a mechanical interface (14) projecting outwards in the inserted state for coupling a handling tool for the rasping tool, characterized by a motor-driven face milling tool (8) with a milling head (20) with end-face cutting edges (22), and further characterized in that an elongated guide rod (6) at least 5 cm long can be coupled to the interface (14), which forms a guide axis (18) for the face milling tool (8), and that the face milling tool (8) has a sleeve-shaped shaft section (24) adjoining the milling head (20).by means of which the face milling tool (8) can be mounted on the guide rod (6) and thereby guided axially and rotationally, and that the face milling tool (8) is not driven in an endless rotation but in a rotationally oscillating manner about the guide axis (18) by a maximum of + / -20° back and forth and for this purpose has an interface (26) at the end of the sleeve-shaped shaft section (24) facing away from the milling head (20) for connection to a motor drive device.

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.