28 results about "Tibia" patented technology

An orthopedic tibial prosthesis includes a tibial baseplate with an asymmetric periphery which promotes proper positioning and orientation on a resected tibia, while also facilitating enhanced kinematics, soft-tissue interaction, and long-term fixation of the complete knee prosthesis. The asymmetric baseplate periphery is sized and shaped to substantially match portions of the periphery of a typical resected proximal tibial surface, such that proper location and orientation is evident by resting the baseplate on the tibia. The baseplate periphery provides strategically positioned relief and / or clearance between the baseplate periphery and bone periphery, such as in the posterior-medial portion to prevent deep-flexion component impingement, and in the anterior-lateral portion to avoid undue interaction between the anatomic iliotibial band and prosthesis components.

The disclosure refers to a spacer instrument (10) for use in a knee arthroplasty procedure, comprising: a spacer carrier device (16) with at least a first spacer component (18) comprising a first thickness (T1) and a second spacer component (20) comprising a second thickness (T2), the first thickness (T1) being different than the second thickness (T2), and a rotative tibia component (28) rotatively attached to the spacer carrier device (16) via a rotation mechanism (30), wherein the rotative tibia component (28) is movable in at least a first position and a second position, wherein in the first position the first spacer component (18) is aligned above the rotative tibia component (28) and wherein in the second position the second spacer component (20) is aligned above the rotative tibia component (28), such that each of the spacer components (18, 20) can be temporarily positioned on top of the resected proximal portion (12) of a tibia (14) with or without the rotative tibia component (28). (Fig. 1 a))

The present disclosure provides a knee joint osteotomy planning apparatus, an automatic knee joint osteotomy apparatus, and a related device, and relates to the technical field of robot control. In the present disclosure, according to prosthesis dimension information of a knee joint prosthesis to be assembled and tool dimension parameters of an osteotomy tool, relative pose relationships between osteotomy cutting-in poses for each tibial / femoral assembly surface of the knee joint prosthesis to be assembled and corresponding tibial / femoral prosthesis reference regions are determined in a reference coordinate system; upon acquisition of desired assembly pose information of the tibial / femoral prosthesis reference regions relative to the actual tibia / femur to be osteotomized in a base coordinate system of a surgical robot, desired osteotomy cutting-in poses for each assembly surface in the base coordinate system are calculated according to the desired assembly pose information and the relative pose relationships; then, in view of surface dimension information of the corresponding assembly surfaces, planar osteotomy trajectories for the corresponding assembly surfaces in the base coordinate system are planned, so as to realize the automatic osteotomy function of the surgical robot, thereby improving osteotomy accuracy and ensuring that the TKA surgery achieves expected outcomes.

The invention discloses an ankle surgery inferior tibiofibular syndesmosis reduction fixing guider, and relates to the field of ankle surgery, the ankle surgery inferior tibiofibular syndesmosis reduction fixing guider comprises a protection plate, the bottom of the protection plate is rotatably connected with a bottom plate, the side face, close to the bottom plate, of the protection plate is connected with a binding belt, a dismounting and mounting mechanism comprises a first clamping groove, the first clamping groove is formed in the upper surface of an external connection block, and a second clamping groove is formed in the lower surface of the external connection block. The external connection blocks are symmetrically distributed up and down relative to the fixing block, and a through groove is formed in the side face of the connection arc block in a penetrating mode. According to the ankle surgery inferior tibiofibular combined reduction fixing guider, when the fixing block slides, the positioning plate can be driven to slide to the side face of the injured position of the ankle tibiofibular for extrusion and attachment, after the positioning plate is extruded, the position of the ankle can be fixed to prevent shaking, and after the fixing block is detached, the positioning plates of different specifications and shapes can be replaced; the position of the positioning plate can be adjusted up and down when the positioning plate is used for positioning, the adjusting efficiency is high, and the adaptability of the fixed guider to the ankle injury is improved.

A system for preparing at least one of a tibia (308) and a talus (306) with a defect, the system optionally comprising: a cutting instrument (100) configured to receive a guide (204) at a tibiotalar joint space (314), wherein the cutting instrument is configured to resect at least one of the tibia and talus to prepare for an implant; and a shaft (204) configured to couple with the cutting instrument within the tibiotalar joint space.

The present invention discloses a method and system for segmenting the fibula and tibia in a DR knee joint anteroposterior film in quality control, which relates to the field of DR image recognition technology; the method includes obtaining at least one DR knee joint image, and preprocessing the DR knee joint image by a threshold method; using a fuzzy C-means clustering method to segment the fibula and tibia in the preprocessed DR knee joint image; determining the edge of the overlapping part of the fibula and tibia by edge detection; obtaining the lateral edge of the fibula; and judging whether the overlap amount meets the standard based on the edges of the two sides of the fibula and the edges of the overlapping bone tissue. The present invention does not require manual operation, and can completely automatically segment the fibula and tibia, and subsequently uses the overlap amount of the fibula and tibia to determine whether the positioning meets the requirements. The overall process greatly saves the time of judging whether it is a DR knee joint anteroposterior film, and significantly improves the efficiency of image quality control and evaluation.

A method for an orthopaedic surgical procedure includes capturing, using a surgical navigation system, a plurality of measurements of a knee joint of a patient including measurements on an operative side of a femur of the patient relative to a femur coordinate space, measurements on an operative side of a tibia of the patient relative to a tibia coordinate space, and a spatial relationship between the femur coordinate space and the tibia coordinate space at each of a plurality of different poses of the knee joint. The method also includes developing, using the surgical navigation system, a surgical plan for the orthopaedic surgical procedure based on the plurality of measurements. The surgical plan includes a position of a tibial prosthesis in the tibia coordinate space, and a position of a femoral prosthesis in the femur coordinate space. A surgical navigation system is also disclosed.

A robotic system to assist a surgeon during ankle fracture procedures includes an imaging system configured to be at least one of mounted on or arranged adjacent to a robotic device. The system includes a passive arm, a separate actuatable section, and a controller configured to communicate with the actuatable section. The passive arm is structured to be placed on a side of a patient's leg fixed to a platform and the passive arm comprises a fastening mechanism structured to be attached to a tibia of the patient's leg. The actuatable section is structured to be placed on a side of said patient's leg fixed to the platform and the actuatable section comprises a fastening mechanism structured to be attached to a fibula of the patient's leg.

A fixation assembly for quick-connect adjustable attachment of a prosthetic leg to an external ring fixator for immediate post-amputee ambulation. The device is configured for use with an existing external fixation assembly attached to a femur or tibia, and an existing prosthetic leg and foot combination of choice. The assembly generally includes an articulating fixator adjustably-attached to a monolithic support block by locking-ball-joint struts, and quick-connect pins insertable through the fixator and into receptacles on the locking-ball-joint struts for releasable attachment. The monolithic support block is a unitary block configured as a mounting base for mounting the prosthetic leg / foot support to its underside, and upwardly configured for weight-bearing attachment of the locking-ball-joint struts. The quick-connect pins allow releasable mounting to the existing external ring fixator.

The invention discloses a geometric feature-based knee joint cruciate ligament and collateral ligament dead point center positioning method, which comprises the following steps of: acquiring knee joint CT images of a human knee joint and a cruciate ligament related skeleton, acquiring an intercondylar fossa vertex by combining a grey-scale map and binarization processing, screening an inner side point set by utilizing femur model features and combining a detection box, and positioning the knee joint cruciate ligament and collateral ligament dead point center. Determining a posterior cruciate ligament thighbone dead center; the femoral protuberance position is iteratively cut by utilizing the femur model characteristics and combining with medical priori knowledge, whether the medial collateral ligament dead center area is met or not is judged, and then the medial collateral ligament femoral dead center center is determined; combining medical priori knowledge and drawing characteristic lines, and determining the center of a medial collateral ligament tibia dead center; fitting a three-dimensional straight line by using a PCA (Principal Component Analysis) method by using femur model features, and determining the center of a lateral collateral ligament femur dead center through two feature lines in combination with medical priori knowledge; and determining the center of the fibula stop point of the lateral collateral ligament by utilizing the characteristics of the fibula model and combining the area of the fibula stop point of the lateral collateral ligament.

A tibial baseplate is described. While the baseplate can include any suitable component, in some instances, it includes a first surface and a second surface, the second surface being substantially opposite to the first surface and the first surface being configured to be seated on a resected surface at a proximal end of a tibia. In some cases, the baseplate also includes a first spacer coupling that is configured to couple a first spacer to at least one of a lateral side and a medial side of the baseplate such that the spacer is disposed between, and is configured to maintain a set minimal distance between, the proximal end of the tibia and a distal end of a femur when the tibial baseplate is seated on the resected surface at the proximal end of the tibia and the spacer is coupled to the tibial baseplate. Other implementations are discussed.

An orthopedic knee prosthesis includes a femoral component configured to couple to a femur, a tibial bearing including a top portion, including one or more concave bearing surfaces, configured to articulate with one or more curved condyle surfaces of the femoral component, a tibial coupler configured to be associated with the tibial bearing and configured to couple to a tibia, a first magnetic portion statically coupled to the tibial coupler and including a first pole having a first pole polarity, and a second magnetic portion statically coupled to the tibial bearing and including a second pole configured to generally face the first pole and having a polarity that is the same as the polarity of the first pole, wherein movement of the tibial bearing in relation to the tibial coupler causes an increase in a magnetic repulsive force between the first magnetic portion and the second magnetic portion.

1. Name of the Industrial Design Product: Fracture External Fixation Device (Tibia and Fibula). 2. Use of the Industrial Design Product: Mainly used to wrap around the fracture site of the patient's tibia and fibula for fracture fixation. 3. Design Key Points of the Industrial Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Front View. 5. This industrial design product is a thin product, and the left view, right view, top view and bottom view are omitted.

The invention provides a method for determining osteotomy parameters on a tibia three-dimensional image based on two-dimensional and three-dimensional registration, and the method comprises the steps: determining a target conversion matrix and a simulated tibia two-dimensional image similar to an actual tibia two-dimensional image based on the tibia three-dimensional image and a simulated light source, the target transformation matrix represents the spatial transformation relation between the spatial attitude of the tibia when the tibia is matched with the tibia three-dimensional image and the spatial attitude of the tibia when the tibia is matched with the actual tibia two-dimensional image; determining simulated osteotomy points and simulated hinge points on the simulated tibia two-dimensional image based on planned osteotomy points and planned hinge points pre-marked on the actual tibia two-dimensional image by a user; performing spatial transformation on the simulated light source, the simulated osteotomy point and the simulated hinge point based on the target transformation matrix to obtain a transformation light source, a two-dimensional osteotomy point and a two-dimensional hinge point matched with the spatial attitude of the tibia three-dimensional image; and determining osteotomy parameters based on the conversion light source, the two-dimensional osteotomy points and the two-dimensional hinge points.

A method of evaluating a knee joint including a femur, a tibia, and ligaments, includes: inserting into the joint a tensioner-balancer; moving the joint while using the tensioner-balancer to maintain predetermined distraction force or distraction height, and collecting height and force data; deriving ligament displacement data and load data from the height and distraction data; processing the data into a digital model of the joint, including a characterization curve for a plurality of flexion angles; importing into the model implant geometry having femoral and tibial components, each having a back surface; updating the model with a location of femoral and tibial cuts, positioned such that when the components are placed in the joint with their back surfaces against the respective cuts, the implant will position the joint to function in a selected portion of the curve; and storing the model.

According to one example, a tibial prosthesis can include a tibial bearing component, tibial baseplate, an insert and a fastener. The tibial bearing component can have medial and lateral proximal articular surfaces and an opposing distal surface. The tibial bearing component can define at least one recess therein with the recess having an opening at a periphery of the tibial bearing component. The tibial baseplate can be coupled to the tibial bearing component on the proximal surface thereof and having a distal surface configured to be disposed on a resected proximal surface of a tibia. The insert can be configured to be disposed within the recess and can engage the tibial baseplate and the tibial bearing component. The fastener can be insertable into the tibial bearing component and can be configured to retain the insert to the tibial baseplate.

A spacer instrument for use in a knee arthroplasty procedure includes a spacer carrier device with at least a first spacer component having a first thickness and a second spacer component having a second thickness. The first thickness is different than the second thickness. A rotative tibia component is rotatively attached to the spacer carrier device via a rotation mechanism. The rotative tibia component is movable in at least a first position and a second position. In the first position, the first spacer component is aligned above the rotative tibia component. In the second position, the second spacer component is aligned above the rotative tibia component, such that each of the spacer components can be 10 temporarily positioned on top of the resected proximal portion of a tibia with or without the rotative tibia component.

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.

A device for assessing laxity of a joint is disclosed. The device comprises a trial component comprising a base plate configured to couple to a tibia of the joint and a superior spacer coupled to the base plate. The base plate and the superior spacer define a cavity therebetween that may receive a portion of a tensioner tool. When force is applied via the tensioner tool, the superior spacer is configured to be selectively moved from a first position in contact with a superior surface of the base plate to a second position separated from the superior surface. A system for assessing laxity of a joint including a first bone and a second bone is also disclosed. The system comprises the trial component, the tensioner tool, and a processor configured to determine a gap distance associated with the first bone and the second bone during tensioning.

The techniques described herein relate to a tibial prosthesis for a knee arthroplasty optionally including a baseplate and a tibial keel. The baseplate optionally including: a distal surface sized and shaped to substantially cover a proximal resected surface of a tibia; a proximal surface opposite the distal surface, the proximal surface having a lateral compartment and a medial compartment opposite the lateral compartment; a periphery extending between the distal surface and the proximal surface; a first layer of porous material forming at least a majority of the distal surface and extending to the periphery; and a second layer of non-porous or relatively less porous material having a plurality of reference features extending through the first layer, wherein the plurality of reference features form at least a portion of the distal surface; and a tibial keel extending distally from the distal surface to define a longitudinal tibial keel axis. 20 24 27 84 88 17 D ec 2 02 4 2 0 2 4 2 7 8 4 8 8 1 7 D e c 2 0 2 4

The application discloses a six-degree-of-freedom light high-compatibility foot-ankle rehabilitation exoskeleton, which comprises an ankle-tibia connecting rod module, an ankle joint shaft module, a forefoot fixing module and a hindfoot fixing module; the ankle-tibia connecting rod module is used for being fixed in parallel with a lower leg and providing a power assisting anchor point at the back side of the lower leg; the forefoot fixing module and the hindfoot fixing module are respectively used for being fixed with the front end and the rear end of the foot of a wearer and providing an end power assisting anchor point at the heel; the ankle joint elastic element is directly contacted with the shoes of a user, and six-degree-of-freedom flexible interaction force is generated. The traditional foot-ankle exoskeleton is limited to toe flexion and dorsiflexion movement, and the elastic element design of the application can adapt to any movement of the foot-ankle within a safety limit, that is, the movement of the foot-ankle, such as internal rotation, external rotation, internal collection, external expansion, toe flexion and dorsiflexion. The application can effectively increase the activity of the foot-ankle, greatly improve the man-machine compatibility, and solve the problem that the existing ankle exoskeleton robot cannot meet the daily functional requirements of patients due to the heavy body configuration and single degree-of-freedom configuration.

An intramedullary tibia alignment system includes an alignment rod, a tibial resection guide and a tibial alignment jig. The tibial alignment jig has a sliding rail, a casing slidably receiving the sliding rail and being attached to the alignment rod, and a user adjustment element rotatably held by the alignment rod. The user adjustment element is functionally connected to the casing by a link element such that a rotation is converted into a pivoting movement. The user adjustment element and the alignment rod are adapted to interlock with each other at a plurality of rotational positions of the user adjustment element. The plurality of rotational positions correspond to different orientations of the alignment rod in accordance with the pivoting movement of the alignment rod.

A medical auxiliary device for joint bone replacement surgery that allows clinicians to precisely, quickly, and conveniently cut joint bones while providing stable fixation during the surgical procedure. a first auxiliary device that fits the femur to be cut, with a first fitting surface at the top that conforms to the shape of the femur. One side of the first auxiliary device is equipped with a first cutting groove and multiple locking holes. The first cutting groove allows an orthopedic saw to cut the femur, and the locking holes allow screws to pass through and fix the first auxiliary device to the femur. A second auxiliary device is fixed to the tibia to be cut, with a second fitting surface at the bottom that conforms to the shape of the tibia. One side of the second auxiliary device is equipped with a second cutting groove and multiple fixation holes.

Unicompartmental tibial components are described herein. A first unicompartmental component comprises a plate having a bearing surface and an opposing surface that is configured to be secured to a proximal end of a patient's tibia, wherein the plate further comprises an anterior end, an outer side, a posterior end and an inner side, wherein a mediolateral width W of the plate is defined between the outer and inner sides, and a longitudinal anteroposterior axis extends between the anterior and posterior ends approximately one third of the width of the plate (i.e. 1 / 3W) from the lateral side, and defines a longitudinal axis length L of the plate. A first elongate peg protrudes from the opposing surface in the anterior portion, the first elongate peg defining a first peg axis. A second elongate peg protrudes from the opposing surface in the anterior portion, the second elongate peg defining a second peg axis. The first and second peg axes are disposed at an angle of 45-70 degrees with respect to the longitudinal anteroposterior axis and are substantially parallel to one another such that the first and second pegs protrude posteriorly as well as distally with respect to the plate. An anterior portion of the plate comprises a part of the plate defined by an anterior 60% or less of the longitudinal axis length L, whilst a posterior portion of the plate comprises a part of the plate that is defined by the remaining posterior 40% or more of the longitudinal axis length L. The posterior portion of the opposing surface is free from pegs or other fixation devices, and the first and second elongate pegs are located more than half of the mediolateral width W of the plate from an outer edge of the plate. The component is configured for cementless fixation using an interference fit. Also described is a method of installation and a tool suitable for use in installation.

An intraosseous access model, comprises a simulated bone of a plastic material, the simulated bone having an intraosseous space. The simulated bone is sealed by a sealing material and covered in fabric. The simulated bone is incorporated in a manikin having simulated skin. The simulated skin has an opening to allow the simulated bone to be removed and replaced. A port in communication with the intraosseous space allows for introducing or draining liquids. A method of making an access model includes incorporating a simulated bone into a manikin.

The utility model discloses a knee joint thickness-adjustable gasket test mold, and relates to the technical field of medical instruments. A knee joint thickness-adjustable gasket test mold comprises a base used for being in contact fit with a tibial plateau; the ejection piece is located above the base, can move up and down relative to the base and is used for being in contact fit with the femoral condyle; the adjusting sliding block is arranged on the base in a sliding manner; the two ends of the connecting rod are hinged to the adjusting sliding block and the ejecting piece respectively. According to the thickness-adjustable gasket test mold for the knee joint, the sliding block is adjusted to move to drive the connecting rod to push or pull the ejector piece to move up and down relative to the base, so that the overall thickness of the gasket test mold can be adjusted, gasket test molds of different thicknesses do not need to be prepared for gasket test molds of different specifications, and in the operation process, the operation efficiency is improved. And the proper thickness of the gasket can be finally determined without disassembling and assembling the gasket test mold for many times.

The utility model relates to the technical field of medical instruments, in particular to a tibia sagittal osteotomy guider, in particular to a tibia sagittal osteotomy guider used for an oxford inner side movable platform unicompartmental knee arthroplasty, which comprises a sleeve, a guide frame and a locking piece. A guide part is formed at the first end of the guide frame, a plurality of clamping teeth are formed on the guide part, a connecting part is formed at the second end of the guide frame, and a strip-shaped guide hole is formed in the connecting part; a mounting hole is formed in the sleeve, the sleeve comprises a fixing seat, fixing teeth are formed at the first end of the fixing seat, a sleeve is fixed to the second end of the fixing seat, and the sleeve penetrates through the guide hole and then is locked with the locking piece in a matched mode. By means of the slidable design of the guiding frame, guiding and positioning on the tibia platforms of different anatomical forms are achieved, an operator can conveniently use a reciprocating saw to conduct tibia sagittal osteotomy according to the edge of the guiding frame, and accurate tibia platform sagittal osteotomy can be achieved.