99 results about "Arthroplasty" patented technology

The invention provides an osteotomy path adjusting system in robot-assisted knee arthroplasty, and belongs to the technical field of knee joint detection. The system comprises a multi-modal data acquisition unit which comprises a knee joint pressure measuring gasket, an optical acquisition module and a kinematics data acquisition module, the knee joint pressure measuring gasket is used for acquiring knee joint pressure signals in an operation, and the optical acquisition module is used for acquiring relative poses of a femur and a tibia; the kinematics data acquisition module is used for acquiring kinematics data of the mechanical arm; the main control calculation unit comprises a data fusion module and a dynamic compensation module, and the data fusion module is used for constructing a synchronous spatio-temporal data set; and the dynamic compensation module is used for outputting a compensation instruction to the mechanical arm to adjust an osteotomy path based on the synchronous spatio-temporal data set, the preoperative predicted pressure prediction matrix and the soft tissue stiffness matrix. The pressure change in the operation can be responded in real time, the operation precision of the knee arthroplasty is improved, and the dependence on the experience of doctors can be reduced.

The invention provides a data processing method, medium and equipment in knee arthroplasty, and belongs to the technical field of medical electronics. The method comprises the following steps: acquiring pressure distribution data, measured by an array sensor, of an articular compartment in a complete period of joint movement; based on the pressure distribution data, pressure centers under all buckling degrees in the whole period of joint movement are calculated, and corresponding pressure center tracks are formed; calculating shear stress distribution data under the complete period of joint movement based on the pressure center track data; based on the pressure distribution data, calculating a dynamic pressure envelope line under the complete period of the joint movement; and generating an intraoperative correction suggestion for knee arthroplasty based on the pressure center trajectory, the shear stress distribution data and the dynamic pressure envelope. The correction suggestions given by the method are more accurate for abnormal conditions occurring in knee replacement.

According to one example, a for revision knee arthroplasty is disclosed. According to this example, the method can include shaping a bone of a patient to create one or more recesses therein, selecting a stem provisional, disposing the stem provisional within the one or more recesses, and assembling in vivo the stem provisional with both a first provisional component configured to simulate a shape of one of a tibial tray implant or a femoral implant and a second provisional component configured to simulate a shape of at least one of a sleeve component, a cone component or a keel component of an implant.

Methods and devices are disclosed for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion, while maintaining the rotational position of the femur with respect to the tibia that replicates proper kinematic placement of these bones. Also disclosed are methods and devices for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion using one or more expansion devices that are not actively requiring monitoring and / or recording of forces applied by the bodily tissues, but instead uses incremental changes in actual length / height of the expansion device to determine whether the joint is properly tensioned or too lax.

A device for registering a bone for a robotic knee arthroplasty with a surgical robot can include a plate and a registration device. The plate can be engageable with the bone and can include a lateral portion, a medial portion, and a hinge. The registration device can be connected to the plate and can be configured to interface with the surgical robot for registration of the plate and the bone.

Methods and devices are disclosed for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion, while maintaining the rotational position of the femur with respect to the tibia that replicates proper kinematic placement of these bones. Also disclosed are methods and devices for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion using one or more expansion devices that are not actively requiring monitoring and / or recording of forces applied by the bodily tissues, but instead uses incremental changes in actual length / height of the expansion device to determine whether the joint is properly tensioned or too lax.

A control method for an arthroplasty surgical robot includes: capturing a bone image, transmitting the image to a computer system, and acquiring image data of a bone; selecting a suitable prosthesis model and placing it on a diseased joint for matching, wherein the overlapping part between the model and the bone is the part that needs to be removed and replaced; mounting signal sources; capturing a bone image again, including the signal sources and the joint part; establishing a coordinate system using the signal sources as the origin, and calculating and memorizing an interface between the model and the bone overlapping part and the coordinates of the interface in the coordinate system; and receiving the coordinates by a surgical robot, and obtaining the positional coordinates by the surgical robot of a part of the diseased joint that needs to be removed, and performing a surgical operation by the surgical robot.

A method for measuring a relative movement between bones and a method for acquiring a joint rotation axis of bones are provided, which can effectively improve rotational stability of a prosthesis of knee arthroplasty, thereby improving surgical outcomes. A population average bone joint most stable axis (a-MSA) is acquired through the method, so that the design of a joint prosthesis can be improved and a reference of a population average position can be provided for intraoperative placement of a prosthesis. An individual bone joint MSA (i-MSA) of a patient is acquired through the method before surgery, so that individual position information can be provided for intraoperative placement of a prosthesis, thereby further improving rotational stability of a surgical prosthesis.

Disclosed herein are tracking element fixation elements for affixing computer-assisted surgical system (CASS) tracking elements to a patient. Fixation systems provide kinematic coupling or clamping functionality that allows tracking elements (attached to a tracker arm) to be repeatedly and accurately detached and re-attached to facilitate removal when necessary, such as for point probe data collection, during impaction, bone movement, and / or the like. Fixation systems may include a baseplate and a tracker arm configured to be kinematically coupled to the baseplate via a magnet associated with independent ball bearings or contacts extending from a bottom surface of the magnet. The ball bearings or contacts are configured to be received within corresponding grooves of the baseplate. The baseplate may include one or more protrusions extending from a bottom of the baseplate that are configured to be impacted into the cortical bone of the patient.

The invention relates to the technical field of surgical measurement, in particular to a real-time measurement method and system for the length and eccentric distance of lower limbs in hip replacement. According to the technical scheme, the method comprises the following steps that anatomical feature points on the two sides of a patient are obtained, wherein the anatomical feature points at least comprise the positions of anterior superior iliac spines on the two sides and the positions of high points on the inner side and the outer side of ankle joints on the two sides; and according to the obtained anatomical feature points, calculating and establishing a normal position reference plane of the patient. By means of the non-invasive body surface positioning and optical tracking technology, the length and the eccentric distance of the lower limb can be accurately measured in real time in the hip replacement. The method comprehensively considers the change of both sides of the acetabulum and the femur, avoids the trauma risk of traditional invasive navigation and the deviation of single measurement, and provides a quantitative basis for doctors through intraoperative dynamic data feedback and preoperative, intraoperative and postoperative whole-course evaluation, thereby improving the surgical precision and reducing the occurrence rate of complications with unequal lengths of lower limbs.

The utility model relates to a thighbone side guide plate based on two-point bridging type knee joint unicompartmental knee arthroplasty, which comprises a first auxiliary plate, a second auxiliary plate and a third auxiliary plate, modeling is carried out through knee joint CT data before an operation, and two cartilage-free bone surfaces around a thighbone operation area are set as supporting points, so that the thighbone side guide plate can be used for knee joint unicompartmental knee arthroplasty. A 3D printing technology is used for printing a guide plate used for thighbone side and tibia side positioning and osteotomy, the guide plate is provided with a first auxiliary plate, a second auxiliary plate and a third auxiliary plate, the second auxiliary plate and the third auxiliary plate can be directly attached to the bone surface of cartilage-free tissue, the position of the first auxiliary plate above an operation area is achieved through two-point positioning, and the position of the second auxiliary plate above the operation area is achieved through two-point positioning. The first auxiliary plate does not need to be attached to the bone surface of the operation area, that is, the first auxiliary plate is not affected by cartilage tissue above the operation area, the precision error caused by the cartilage tissue of the osteotomy area is avoided, an operator can be guided more rapidly and accurately to conduct positioning and osteotomy in the operation, and the operation time and process are shortened.

A bone implant may include a shaft having a proximal end, a distal end, a longitudinal axis, a proximal shaft portion, and a distal shaft portion. The proximal shaft portion may include a first minor diameter, and a first helical thread disposed about the proximal shaft portion defining a first major diameter. The first helical thread may include a first concave undercut surface. The distal shaft portion may include a second minor diameter, and a second helical thread disposed about the distal shaft portion defining a second major diameter. The second helical thread may include a second concave undercut surface. The first and second concave undercut surfaces may be angled towards the distal end of the shaft. The second minor diameter may be smaller than the first minor diameter and the second major diameter may be smaller than the first major diameter.

A method is provided for performing a quadruped unicompartmental stifle arthroplasty. The method includes cutting a plateau of a tibia to form first cut surfaces. The method also includes cutting a medial condyle of a femur to form second cut surfaces. The method also includes aligning openings in a first trial device with the first cut surfaces and forming first holes in the first cut surfaces by passing a drill through the openings in the first trial device. The method also includes aligning openings in a second trial device with the second cut surfaces and forming second holes in the second cut surfaces by passing a drill through the openings in the second trial device. The method also includes mounting a first implant device to the first cut surfaces and mounting a second implant device to the second cut surfaces. A system is also provided for performing the method.

Systems, methods and apparatuses including an insert having a body with a plurality of bladders therein, a proximal surface and a distal surface. Two or more of the plurality of bladders are in fluid communication with one another. The plurality of bladders are expandable and contractible in volume. The proximal surface shapable by a change in the volume of one or more of the plurality of bladders. The proximal surface is configured to interface with a first arthroplasty implant of the patient. The distal surface is spaced from the proximal surface by the body and is configured to interface with a second arthroplasty implant of the patient.

The application provides a sterile protection device for an arthroplasty osteotomy process, which comprises a bending rod, both ends of the bending rod are fixedly connected with receiving bending plates, a single receiving bending plate is fixedly connected with a ring-shaped support, a protection assembly is arranged on the ring-shaped support, a switching device is arranged on the receiving bending plate, and the arc-shaped inner side of the receiving bending plate is fixedly connected with a rectangular air bag; the protection assembly comprises electric push rods which are installed on the ring-shaped supports, the number of the electric push rods is four, and two electric push rods are arranged on a single ring-shaped support in a group. The protection assembly can be constructed into different protection modes above the protection assembly, and can better protect personnel in the operation and after the operation.

An implant type or a process of implant fixation is automatically identified by processing surgical plan information. Further, bone mineral density information associated with a patient is determined by processing at least one image. The determined bone mineral density information and patient information representing at least demographics associated with the patient are processed, and a selection of a plurality of patients that previously underwent arthroplasty is made. Outcome information representing results of arthroplasty procedures is processed and a threshold is established representing a biomechanical tolerance. The bone mineral density information is processed to be determined associated with the patient is determined to be above or below the threshold.

An implant type or a process of implant fixation is automatically identified by processing surgical plan information. Further, bone mineral density information associated with a patient is determined by processing at least one image. The determined bone mineral density information and patient information representing at least demographics associated with the patient are processed, and a selection of a plurality of patients that previously underwent arthroplasty is made. Outcome information representing results of arthroplasty procedures is processed and a threshold is established representing a biomechanical tolerance. The bone mineral density information is processed to be determined associated with the patient is determined to be above or below the threshold.

The invention discloses a multifunctional rehabilitation brace used after a joint operation. The multifunctional rehabilitation brace comprises a first shell, a second shell, a protective shell and two symmetrically-arranged connecting assemblies. The two sides of the outer wall of the first shell are each fixedly provided with a first inner sliding groove, and the first inner sliding grooves are opened downwards. The upper end of each connecting assembly is arranged in the corresponding first inner sliding groove in a sliding mode and is fixedly connected with the corresponding first inner sliding groove through a connecting fastener after being adjusted to a proper position. The two sides of the outer wall of the second shell are each fixedly provided with a second inner sliding groove, and the second inner sliding grooves are opened upwards. The lower end of each connecting assembly is arranged in the corresponding second inner sliding groove in a sliding mode and is fixedly connected with the corresponding second inner sliding groove through a connecting fastener after being adjusted to the proper position. The two sides of the protective shell are connected with the middle positions of the two connecting assemblies correspondingly. The height can be effectively adjusted, soft tissue is prevented from being pressed, and secondary damage to knee joints during falling is avoided.

Disclosed herein are systems and methods for planning a knee arthroplasty procedure. In one example, a surgical method includes intraoperative measurement of patient anatomical information of the knee and / or movement of the knee of a patient resulting from electrical stimulation of nerves or muscles to cause articulation of the knee. An electrical stimulation system may be attached to a patient to cause contraction / relaxing of muscles operative to cause articulation of the knee. Tracking elements may be associated with relevant knee anatomical structures, such as the proximal tibia, the distal femur, and / or the patella to track the movement of the knee components resulting from the electrical stimulation. Implant components may be selected, positioned, and / or orientated using the tracking information resulting from the electrical stimulation, thereby allowing for determination of a surgical plan based on intraoperative muscle-activated knee articulation, configured to emulate natural patient anatomy and kinematics.

1. The name of the design product: knee joint surgery gasket. 2. The use of the design product: gasket used in total knee arthroplasty; used for measuring knee joint pressure and changes and intraoperative soft tissue balance adjustment operation. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: assembly 1 perspective view 1. 5. Other components that need to be explained: component 1 is a knee joint surgery measurement gasket; component 2 is a knee joint surgery adjustment gasket.

A surgical implant aperture insert for use in a surgical implant system; and a surgical implant system for use in arthroplasty, the surgical implant system comprising an aperture and a surgical implant aperture insert. The insert increases the surface area of a surgical component that can be used for bone regrowth, and a mating component may be provided to allow for use of different fixtures within the aperture.

Methods and devices are disclosed for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion, while maintaining the rotational position of the femur with respect to the tibia that replicates proper kinematic placement of these bones. Also disclosed are methods and devices for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion using one or more expansion devices that are not actively requiring monitoring and / or recording of forces applied by the bodily tissues, but instead uses incremental changes in actual length / height of the expansion device to determine whether the joint is properly tensioned or too lax.

A femoral head arthroplasty system can comprise a femoral prosthesis comprising a mounting plate having a first side and an opposed second side. An adapter can extend from the second side of the mounting plate. An implant body can extend from the first side of the mounting plate. The implant body can extend from the mounting plate by a distance no greater than 90 mm. The femoral head arthroplasty system can further comprise a femoral head replacement having a generally spherical surface and comprising a recess that is shaped to complementarily receive the adapter of the femoral prosthesis.

A system for performing an osteochondral grafting procedure includes one or more processing devices configured to execute instructions to cause the one or more processing devices to obtain first digital data of an anatomical site of a patient, the anatomical site including a recipient site for an osteochondral graft, the recipient site including an osteochondral defect, determine, based on the first digital data, first characteristics of the recipient site, obtain second digital data of a donor site, determine, based on the second digital data, second characteristics of the donor site, and generate, based on the first and second characteristics, a virtual plug corresponding to the osteochondral graft. The virtual plug is configured to conform to the recipient site, and generating the virtual plug includes at least one of storing data defining the virtual plug and providing, on a display, visual guidance based on the virtual plug.

A knee arthroplasty instrument may include a tensioning instrument and at least a first sensor. The tensioning instrument can optionally include a tibial component configured to engage the tibia and a femoral component configured to engage the femur. The femoral component can be movably coupled to the tibial component to place the knee joint in tension by separating the tibia and the femur. The first sensor can be coupled to the tensioning instrument and can be configured to collect first data regarding a torque of the tensioning instrument when separating the tibia and the femur.

1. The name of the design product: conical grinding drill. 2. The use of the design product: conical grinding drill for micro-incision unicompartmental arthroplasty. 3. The design features of the design product: in shape. 4. The picture or photo that best indicates the design features: perspective view 1.

The subtalar joint prosthesis comprises a talus assembly, a gasket and a calcaneus assembly, and the talus assembly and the calcaneus assembly are connected through the gasket to form a joint structure; by means of the split structure of the talus assembly, the gasket and the calcaneus assembly, all the assemblies are detachably clamped, step-by-step implantation and assembly in the operation process are facilitated, and therefore the adaptability of the prosthesis under different anatomical conditions is improved. The gasket is arranged between the talus assembly and the calcaneus assembly, a relative motion interface is formed between the talus assembly and the calcaneus assembly, the gasket is made of the low-friction material, direct friction between metal assemblies can be effectively reduced, abrasion is reduced, and the joint movement performance is improved. By means of the structural design, dependence of prosthesis implantation on accurate matching of bone surfaces is reduced, surgical operation is simplified, and meanwhile a feasible solution is provided for rebuilding after joint fusion operation.

Systems and methods include stabilizing a leg and providing femoral distraction during a knee arthroplasty surgery. The disclosed systems include a leg holder to receive a foot of a patient and a femoral distractor received in the leg holder and disposed underneath a knee of the patient. The femoral distractor is actuated to increase or decrease in length to distract the femur such that a surgeon may cut to resection the femur without also simultaneously providing distraction of the femur.

A prosthetic system is disclosed for providing motion between a first bone and a second bone of a joint. The system can comprise a support structure (e.g., sleeve or a cone) having a first end surface, a second end surface, an exterior surface extending from the first end surface to the second end surface, and an inner surface defining a passageway extending from the first end surface to the second end surface, wherein the exterior surface of the support structure is configured to be received in a cavity of the first bone such that the first end surface is flush with or beneath a surface of the first bone. The first end surface is within an axial plane defined by the first end surface and an outermost edge of the first end surface, and a longitudinal axis of the passageway of the support structure is offset with respect to a geometric center point of the axial plane.

An arthroplasty system may include a bone joint prosthesis, a bone anchor, a retention member, an articular component, and a component fastener. The bone joint prosthesis may include a bone-facing surface, a component-facing surface, and an anchor passageway formed therethrough. The bone anchor may be receivable through the anchor passageway to secure the bone joint prosthesis to a bone. The retention member may be couplable with the bone joint prosthesis to retain the bone anchor within the anchor passageway. The articular component may be couplable with the bone joint prosthesis and may include a component passageway formed therethrough. The component fastener may secure the articular component to the bone joint prosthesis by coupling within the component passageway, extending through the retention member, and coupling with the bone anchor to secure the articular component to the bone joint prosthesis.