149 results about "Femur" patented technology

The invention discloses a design method of a bionic bone scaffold based on a TPMS (Tire Pressure Monitor System), and belongs to the technical field of bionic bone scaffolds. According to the method, on the basis of a G unit formula and a D unit formula, a bias function is adjusted to generate a G gradient unit CAD model and a D homogeneous unit CAD model; fusing the CAD model of the G gradient unit and the CAD model of the D homogeneous unit by using a fusion function to generate a GD radial fusion CAD model, and adjusting an offset function of the G gradient unit by adopting an interpolation method to enable the GD radial fusion CAD model to reach a target average porosity; reducing the wall thickness of the GD radial fusion CAD model to form a GD radial fusion CAD model with the wall thickness; then, a finite element simulation grid model is divided, and an inp-format simulation model file is output; importing the simulation model file in the inp format into HyperMesh software for repairing, and dividing grids to export the model in the inp file format. According to the porous scaffold designed by the invention, different functional grades of a natural bone structure are considered, and different unit cell polymorphic fusion is carried out, so that the porous scaffold better conforms to the mechanical properties of natural thighbones, and the specific surface area is increased by virtue of the lightweight design, so that more space is provided for bone cell adhesion and growth.

Provided are a surgical instrument and a surgical instrument system which has a simple structure and with which an osteotomy can be done with a simple operation. A surgical instrument includes a spacer part having a predetermined thickness, a guide part extending in a direction perpendicular to the guide part. The spacer part includes a first surface that abuts on one of posterior condyles of a femur at a bent position of a knee joint. The guide part includes a second surface that extends perpendicular to the first surface and abuts on a distal end part of the femur, and a guide slit penetrating the guide part along a direction parallel to the first surface and through which an osteotomy instrument is inserted.

A robot-aided knee arthroplasty system includes a robotic device and a controller communicable with the robotic device. The controller is configured to control the robotic device to apply a force configured to increase a gap distance between a femur and a tibia of a knee joint and collect measurements of the gap distance between the femur and the tibia as the robotic device applies the force.

A bone fixator as disclosed herein includes at least one removable portion, and is particularly suitable for external fixation of the bones of the femur and tibia (knee joint), the tibia to the foot (ankle joint), the lower leg, the lower thigh, or the forearm and hand. Embodiments allow multiaxial, multiplanar movement, as well as procurvatum and recurvatum, on the anatomy to achieve optimal placement. Embodiments of the fixator includes four fixator joints, each of which is articulating with multiple degrees of freedom. Some fixator joint(s) include a linkage bar connectable to a multi-pin clamp having a quick connect mechanism. The multi-pin clamp is configured for fixation to a bone. Other fixator joint(s) may be connected to the multi-pin clamp in a semi-permanent or non-detachable manner. A telescoping rod assembly allows adjustment of the length of the fixator by a single individual.

The invention discloses an anterior cruciate ligament dead center positioning method based on three-dimensional geometric processing, and the method comprises the steps: obtaining a knee joint CT image of a knee joint of a human body and an anterior cruciate ligament related skeleton, and obtaining a three-dimensional mesh model of a femur and a tibia after preprocessing; traversing all three-dimensional vertex coordinates of the femur three-dimensional mesh model, generating contour lines from the bottom to the top, and selecting a contour line with the maximum perimeter as a feature contour line; after the feature contour line is projected, an extrusion model is obtained in a linear extrusion treatment mode, and the top face and the bottom face of the extrusion model are filled to obtain a complete closed extrusion model; obtaining a shaft alignment bounding box of the extrusion model so as to obtain a sphere model used for cutting, and obtaining a dial plate model by using the cut communication partition so as to obtain a 1-o'clock characteristic line; two feature vertexes are positioned through two times of cutting; obtaining a final dead center coordinate of the thighbone three-dimensional mesh model; the feature contour line of the tibia three-dimensional mesh model is obtained by adopting the method, the mesh is drawn according to the proportion, and the dead center coordinates of the tibia three-dimensional mesh model are positioned by penetrating out of the platform.

The invention provides a medicinal and edible composition for preventing and treating osteoporosis and a preparation method thereof. The medicinal and edible composition comprises the following raw materials in parts by weight: 15-24 parts of prepared rehmannia root, 12-15 parts of dogwood, 12-20 parts of Chinese yam, 15-20 parts of astragalus membranaceus, 3-10 parts of angelica sinensis and 10-20 parts of folium cortex eucommiae; the medicinal and edible composition provided by the invention promotes osteoblast differentiation, inhibits osteoclast absorption, regulates bone metabolism balance, increases the maximum load of thighbone, and improves bone density and bone strength by increasing osteoprotegerin and reducing type I collagen C-terminal peptide and tartrate-resistant acid phosphatase. The medicinal and edible composition disclosed by the invention is high in safety, can be developed into medicines, health care products or functional foods, and is applied to prevention and treatment of osteoporosis.

The invention discloses a method for designing a bionic bone scaffold based on TPMS unit and lattice unit multi-plane fusion, and belongs to the technical field of bionic bone scaffolds. The porosity is adjusted by adjusting the wall thickness, so that an S and SC homogeneous unit porous structure with the target porosity is formed, and then a Schwarz unit cell and a simple cubic unit cell are subjected to plane smooth transition fusion in a fusion region or fusion function tan (x / w) mode; and respectively importing the established fusion model into mechanical simulation software to carry out quasi-static compression finite element simulation so as to obtain the elastic modulus and the yield strength which accord with the thighbone. According to the design, different types of TPMS units and traditional lattice units are subjected to heterogeneous unit fusion, the fused novel porous structure model has different function grading expressions, and a new thought is provided for design of the porous structure as a bionic bone scaffold.

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 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.

To provide a spacer instrument allowing evaluating an extension gap and / or flexion gap between a femur and a tibia or the respective implants.SOLUTION: A spacer instrument 10 comprises: a spacer carrier device 16 with a first spacer component 18 having a first thickness T1 and a second spacer component 20 having a second thickness T2, the first thickness being different from the second thickness; and a rotative tibia component 28 rotatively attached to the spacer carrier device via a rotation mechanism 30. The rotative tibia component is movable between at least a first position and a second position. The first spacer component at the first position and the second spacer component at the second position are directly above the rotative tibia component, and the spacer components respectively can be temporarily positioned on the resected proximal portion 12 of a tibia 14 with or without the rotative tibia component.SELECTED DRAWING: Figure 1

The invention relates to fermented lactobacillus mucus UP-1 and application thereof to improvement of bone metabolism and promotion of growth, and belongs to the technical field of microorganisms, the classification name of the fermented lactobacillus mucus UP-1 is Limosilicobacterium fermentum UP-1, the preservation unit of the fermented lactobacillus mucus UP-1 is China General Microbiological Culture Collection Center, and the preservation number of the fermented lactobacillus mucus UP-1 is CGMCC No.33076; the preservation time is December 16, 2024. The fermented lactobacillus mucus UP-1 provided by the invention can promote the increase of the body length and the thighbone length diameter by increasing the levels of insulin-like growth factor binding protein-3 (IGFBP3), growth hormone (GH) and insulin-like growth factor (IGF-1) in serum, improve the density of bone trabecula and the level of beneficial metabolite short-chain fatty acid, improve the bone metabolism level, promote the growth of a human body and promote the growth of a human body. The health development of bones is promoted, so that the purposes of promoting growth and development and improving nutrient absorption are achieved, and more scientific diet intervention and precise probiotic development are facilitated.

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.

An orthopaedic surgical instrument includes a 4-in-1 cutting block and a removable alignment guide. The alignment guide is configured to contact the posterior femoral condyles of a patient's femur so as to kinematically align the 4-in-1 cutting block. A number of shims are selectively installed on the alignment guide to account for any cartilage loss present on the patient's femur. A method of surgically preparing a patient's femur utilizing kinematic alignment is also disclosed.

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 proximal-femur intraosseous release device includes a release mechanism. A primary fixing mechanism is provided at one end of the release mechanism, the primary fixing mechanism includes a first shell, and a second shell, a first triangular block and a second triangular block are arranged inside the first shell; the second shell is screwed to the first shell through threads, a bottom of the second shell is rotatably connected with the first triangular block, the first triangular block is slidably connected with the first shell, a bottom surface of the first triangular block is an inclined surface, the second triangular block is located at a bottom of the first triangular block, a top surface of the second triangular block is an inclined surface, and a through hole matched with the second triangular block is formed in the first shell.

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.

An orthopedic instrument (10) for a knee arthroplasty, the instrument including: a base (12) having one or more paddles (36) configured to seat against and reference one or both of a medial condyle and a lateral condyle of a femur; a body (14) linked to the base for rotation relative thereto, wherein the body includes a recess and slot therein and a first indicia (24) along a first face of the body adjacent the slot; a post (20) received in the recess and moveable relative to the body, wherein the post has a second indicia (28) used with the first indicia to determine a posterior size of the femur; and an adjustment mechanism (18) having a third indicia (30) to indicate a rotation of the femur, wherein the adjustment mechanism is configured to rotate the body relative to the base to a desired orientation based upon the rotation of the femur.

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.

The present invention provides an arthroscopic joint space expansion device, comprising an upper clamp body and a lower clamp body, wherein the upper clamp body is hingedly connected to the lower clamp body, and the upper clamp body is divided into an upper clamp body inner section and an upper clamp body outer section with the hinge of the upper clamp body and the lower clamp body as the boundary, and the lower clamp body is divided into a lower clamp body inner section and a lower clamp body outer section with the hinge of the upper clamp body and the lower clamp body as the boundary, the end of the lower clamp body inner section is the tibia end, the end of the upper clamp body inner section is the femur end, and a tip is provided on the front side of the femur end of the upper clamp body. The device can enter the patient's body through an incision on the side of the knee joint under arthroscopy, and can expand the inner gap between the femur and the tibia, so as to facilitate the medial meniscus suturing operation.

The invention provides a traction device for fitting a knee joint instantaneous center track, and relates to the technical field of orthopedic medical instruments, the traction device comprises a thighbone fixing ring, a tibia fixing ring, an instantaneous center fitting mechanism and an automatic traction mechanism, a plurality of first through holes are uniformly distributed in the thighbone fixing ring, and a plurality of first fastening nuts are arranged on the first through holes; a plurality of second through holes are uniformly distributed in the tibia fixing ring, and a plurality of second fastening nuts are arranged on the second through holes; a swinging connecting piece is arranged on the instantaneous center fitting mechanism, a sliding block is connected to the swinging connecting piece, the center of the sliding block fits the instantaneous center of the knee joint of the human body, and the sliding block is connected into the guide groove in a sliding mode; the automatic drafting mechanism comprises an electric push rod, the electric push rod is provided with a guide rod, the guide rod extends or shortens to adjust the drafting angle of the instantaneous center fitting mechanism, and then the buckling angle of the knee joint is adjusted. The device has the advantages that the drafting orthopedic precision is high, the drafting angle is automatically adjusted, and the instantaneous center of the knee joint is fitted.

The invention discloses a knee joint stress loading MR dynamic imaging support, and relates to the technical field of medical instruments.The knee joint stress loading MR dynamic imaging support comprises a base and a cushion table, supporting frames are arranged on the front side and the rear side of the top of the cushion table respectively, binding assemblies are arranged on the tops of the outer walls of the two supporting frames respectively, a lifting mechanism is arranged in a fixing box, and the lifting mechanism is connected with the cushion table. The middle side, close to the bottom of the fixing box, of the top of the base is fixedly connected with a positioning sleeve, the top of the transverse face of the L-shaped plate is provided with an inward and outward turning stress potential detection mechanism, and the lower side, close to the inward and outward turning stress potential detection mechanism, of the top of the base is fixedly connected with an arc-shaped guide plate. An electric telescopic rod in the ectropion and ectropion stress position detection mechanism carries out telescopic motion to drive the front end of a cushion table to slide along an arc-shaped guide plate, the state that a knee joint is pulled by external force is simulated, a supporting frame on the rear side is controlled by a lifting mechanism to move upwards, and relative displacement of a tibia and a femur under stress is detected; a method of identifying joint semi-dislocation or abnormal activity.

The invention relates to a knee joint endoprosthesis (1) having a femoral component (10) for anchoring to a distal end of a femur and a tibial component (30) for anchoring to a proximal end of a tibia, wherein the femoral component and the tibial component each have a surface (17, 37) that is porous and / or has elevations and depressions. The invention further relates to a surgical kit for knee joint replacement.

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.

The invention belongs to the technical field of biology, and relates to a pharmaceutical composition containing mesenchymal stem cells and application. By controlling the using time, the medication mode and the dosage of the mesenchymal stem cells and the vitamin D, the synergistic effect of the mesenchymal stem cells and the vitamin D is achieved, the cortical bone mineral density can be effectively improved, meanwhile, the bone trabecula density and the bone trabecula cell density can be improved, and the bone quality is improved. In addition, during formation and distribution of the bone trabecula, the thickness of the bone trabecula, the distance between the bone trabecula and the number of the bone trabecula can be improved, and the biological performance of thighbone and lumbar vertebra bones is effectively improved. According to the technical scheme that the MSC and the RANKL inhibitor are combined for use, the MSC and the RANKL inhibitor have a synergistic effect, various functional indexes of osteoporosis can be comprehensively improved, obviously, the MSC and the RANKL inhibitor are combined for use, the thickness of bone trabecula, the distance between the bone trabecula and the number of the bone trabecula can be effectively improved, the biomechanical property of tibia is effectively improved, and a good reference basis is provided for clinical application.

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.