297 results about "Coxal joint" patented technology

Methods and apparatus using a surgical navigation system to position the femoral component of a prosthetic hip during hip joint replacement surgery without separately affixing a marker to the femur. The navigation system acquires the center of rotation of the hip joint as well as at least one point on the femur in the pelvic frame of reference. From these two points, the navigation system calculates the position and length of a first line between the center of rotation of the hip joint and the point on the femur. Optionally, a second point on the femur that is not on the first line is palpated. The system can calculate the position and length of a second line that is perpendicular to the first line and that runs from the first line to the second palpated point on the femur. The prosthetic cup is implanted and its center of rotation is recorded. A tool for forming the bore within which the stem of the femoral implant component will be placed is tracked by the navigation system. While the tool is fixed to the femur, the surgeon re-palpates the same point(s) on the femur that were previously palpated. The navigation system calculates the position and length of a first line between the center of rotation of the prosthetic cup and the re-palpated first point. If a second point on the femur was re-palpated, the navigation system also calculates the position and length of a perpendicular line between the first line and the second point. The surgical navigation system uses this information to calculate and display to the surgeon relevant information about the surgery, such as change in the patient's leg length and/or medialization/lateralization of the joint.

A system and method used in total joint arthroplasty of a ball and socket joint such as hip and shoulder replacements for accurate positioning of a prosthesis through pinless surgical navigation during replacement surgery according to a predetermined distance from the center of rotation of the replaced joint and/or articular surface to obtain the proper length, offset, and biomechanics of the replaced joint.

An acetabular shell liner having a variable rim surface geometry, which improves range of motion of the femoral component within the liner and decreases the incidence of dislocation and subluxation, and methods of making and using the acetabular shell liner. Prosthetic devices, more particularly hip joint prostheses, containing the acetabular shell liner having a variable rim surface geometry are also provided.

A case for modular neck components for hip implants. The case may include indicators based on independent variables associated with physical characteristics of the implant, including leg length, offset, and anteversion. During surgery, the surgeon may be confronted with a need to change a preoperatively-chosen modular neck. For example, the surgeon may desire a change in at least one of the variables, e.g., leg length, offset, and/or anteversion. The case allows the surgeon to quickly and easily select a different modular neck based on an evaluation of one of the variables without requiring reevaluation of the other variables. A method described herein may include preoperative planning in which a template including a grid coordinate system is used, which advantageously provides an intuitive system for the surgeon both preoperatively and during surgery.

A trial system for an acetabular prosthesis is described. The acetabular prosthesis is generally for implantation in an acetabulum and surrounding pelvis. The acetabular prosthesis includes an acetabular cup having a substantially concave inner surface and a substantially convex outer surface. The described acetabular prosthesis is especially useful in revision hip implant procedures where significant bone tissue loss has occurred either in or around the acetabulum and/or the pelvis. A collection of trial shells are provided to trial a range of motion of the hip joint before implanting a prosthetic shell into the acetabular prosthesis.

A trial system for a prosthesis is described. The prosthesis can include an acetabular prosthesis generally for implantation in an acetabulum and the surrounding pelvis. The acetabular prosthesis includes an acetabular cup having a substantially concave inner surface and a substantially convex outer surface. One trial shell or a collection of trial shells are provided to trial a range of motion of the hip joint before implanting a shell prosthesis into the acetabular prosthesis.

A walking assistance system includes an upper leg fitting which is attached along a user's upper leg. The upper leg fitting is formed from an upper leg frame that forms a framework of the upper leg fitting, and an upper leg coupling member that is vertically slidably supported on a guide rail provided on the upper leg frame, rotatably supported around a support shaft, and joined to the upper leg. When the upper leg fitting is made to swing in the fore-and-aft direction relative to the user's hip by a hip joint actuator, the position of the center of swing of the upper end of the upper leg fitting and the position of the hip joint are displaced, but it is possible to make the upper leg coupling member follow the upper leg by moving the upper leg coupling member relative to the upper leg frame, thus eliminating any uncomfortable sensation.

A suture passer comprising:

• • a handle;
  • a shaft extending distally from the handle;
  • first and second jaw members mounted to the distal end of the shaft, the first jaw member having a suture support for supporting a length of suture;
  • a pitch adjustment mechanism for adjusting the pitch of the first and second jaw members relative to the shaft;
  • a lever mechanism for opening and closing the first and second jaw members relative to one another; and
  • a needle mechanism for selectively urging a needle having a groove therein so that the groove in the needle can engage a length of suture supported by the suture support.

This invention provides a surgical method to treat hip diseases, including Legg-Calve-Perthes disease or developmental hip dysplasia. This method includes several surgical techniques: a transverse osteotomy of the posterior portion of supraacetabular portion, an oblique and inclined osteotomy of the anterior portion of the supraacetabulum, detachment of a bone block from iliac crest, anterolateral displacement of the distal fragment, and insertion of the bone block into the distracted space of the osteotomy site.

The invention discloses a wearable lower limb exoskeleton walking-assisted robot, which comprises an ankle joint motion module, a knee joint motion module, a hip joint motion module, a drive module and a waist and supporting frame module, wherein the knee joint motion module is connected with the ankle joint motion module and the hip joint motion module respectively; the drive module is connected with the knee joint motion module and the ankle joint motion module respectively; and the hip joint motion module is connected with the waist and supporting frame module. During the walking period of the robot, the consistency of hip joint motion and human body motion is good, the coaxiality and the position deviation of the knee joints of a human body and the robot are small, and the ankle joint is compact in structure.

Artificial disc replacements (ADRs), including ADRs with plate-like extensions, can be bent at the junction of the plate-like extension and the ADR Endplate (EP), which allows customization of the ADR to better fit a patient's vertebrae. A hinge joint allows customization of the ADR to fit a patient's vertebrae better. Other embodiments of the ADR contain telescoping components which allow customization of ADRs to replace two or more adjacent discs. Plate-like extensions that inter-digitate facilitate ADR insertion at two or more adjacent levels of the spine. Mechanisms to prevent screws from backing out of the plate-like projections are also disclosed. Nitinol or other shape-memory materials may be used for such purpose. Various other anti-back-out and anti-extrusion mechanisms are disclosed, all of which are applicable to non-spine applications, including long-bone plates, and total hip, knee and other joint prostheses.

A human lower extremity exoskeleton walking aid rehabilitation robot belongs to the technical field of medical rehabilitation equipment, and comprises a lower back movement module, a hip joint movement module, a knee joint movement module and an ankle joint movement module, wherein a back servo motor drives a hip joint to move through a crank and rocker mechanism and a space four-links mechanism; an electric knee push rod drives a knee joint to move; an electric ankle push rod drives an ankle joint to move. The human lower extremity exoskeleton walking aid rehabilitation robot helps a patient with lower limb paralysis to stand and walk, and the flexion and extension movement of the hip joint, the knee joint and the ankle joint is controlled by acquiring pressure signals of soles of feet, so that the patient is helped to stride; the construction and model design of the ankle joint inversion and eversion passive driving degree of freedom can help to reduce impact from the ground, is conductive to reducing the burden of a user keeping balance of the self and the exoskeleton robot in a frontal plane, is beneficial for the patient to walk comfortably, and improves the rehabilitation training efficiency.

The invention relates to a lower limb rehabilitation training exoskeleton with bionics design. An existing lower limb rehabilitation training exoskeleton is complex in driving structure, low in the response speed and not ideal in rehabilitation training effect, and lacks bionic consideration. The lower limb rehabilitation training exoskeleton comprises a waist tightening mechanism and lower limb exoskeleton leg rods, wherein the waist tightening mechanism is connected with the waist of a wearer, the left lower limb exoskeleton leg rod and the right lower limb exoskeleton leg rod respectively have four degrees of freedom and achieve three degrees of freedom of hip joints through a hip joint adduction and abduction mechanism, a hip joint bending and stretching mechanism and a hip joint medial rotation and lateral rotation mechanism. The axes of the three rotation degrees of freedom are orthogonal at the motion center of the hip joints of the human body. The rotation center of a knee joint bending and stretching mechanism moves along with the rotation center of the knee joints of the human body, so that the exoskeleton and the rotation center of the knee joints of the human body are always kept in the same axis. The hip joint bending and stretching mechanism and the knee joint bending and stretching mechanism are directly driven by a motor in cooperation with a speed reducer. The lower limb rehabilitation training exoskeleton is compact and portable in structure, man-machine interference force is avoided, damage caused by rehabilitation training to the knee joints is reduced, and the whole rehabilitation training becomes more natural and easier.

An orthopedic device is disclosed for restoring the normal or natural joint mechanics in, for example, a hip joint. The device includes a first component, such as an acetabular component in a hip implant, that includes a convex articulation surface and a second component, such as a femoral component in a hip implant, that includes a concave articulation surface. It will be appreciated that the convex articulation surface of the device disclosed herein articulates with the concave articulation surface in a mating engagement that may be reversed with respect to the traditional hip implant, in which the concave articulation surface is part of the acetabular component and the convex articulation surface is part of the femoral component.

The invention involves an artificial leg for human-simulating double-foot robot and is within the scope of robot technology. The artificial leg consists of the coax joint, knee joint, anklebone, foot, thigh connecting rod and calf connecting rod, characterized in that a knee joint driving motor is equipped on the thigh connecting rod between the coax joint and the knee joint. The knee joints are two closed-chain structure comprising of four connecting rods. The knee joint driving motor is connected with the rear rods of the four-connecting-rod structure through the parallel four connecting rod mechanism. A stop piece is fixed on the front end of the four-connecting-rod mechanism. An encoder is equipped on the spindle, which is located on the upper end of the four-connecting-rod mechanism. The advantages of this invention are: the distance between the lifted foot and the ground is increased, enhancing the robot's ability of avoid obstacles while it is walking; the calves don't tough the ground during their swinging process, improving the robot's stability and efficiency in walking; the mass distribution in the leg is more similar to that of human being, producing a compact overall structure and high precision in transmission.

The invention shows a hip joint socket and its manufacture, with the hip joint socket including a thin walled metallic outer shell with anchoring pins which is firmly connected to an inner shell of plastic. Since the bearing surface of the inner shell is not produced until after the assembly, a high accuracy of shape of the bearing surface results together with a relatively elastic outer shell and with good anchoring aids for a primary anchoring.

An implant assembly for proximal femur fracture comprises of a targeting device and intramedullary nail having plurality of proximal holes directed towards head and neck of femur wherein the axis of the holes makes an ante version angle of about 5° to 20° with the horizontal plane and at the same time axis of plurality of distal holes making 90° angle to longitudinal axis of said nail that holds the femur wherein said nail has reducing cross section area from thigh end to knee end with grooved knee end with anterior curvature even in short length version, plurality of proximal sliding hip pins with smooth shaft for collapsibility, triflanged end with mores taper to hold proximal femur, large head and washer to get impaction and plurality of distal locking screw to hold distal fragment of femur, optional buttress plate and barrels supporting lateral cortex to get controlled limited guided collapse.

The invention relates to a lower limb structure of a two-leg robot, which belongs to the field of robot. Applying the characteristics of mechanical movement of parallel opposite sides in a parallel four-link, the invention designs the lower limb structure of the robot with two legs having ten degrees of freedom. Compared with the lower limb structure of the general two-leg robot having 12 degrees of freedom, two degrees of freedom of forward swinging on two ankle joints are decreased. In connection with the opposite driving method with two motors and the same axle applied by each forward swinging and sideward swinging, the invention increases a joint driving torque and decreases the rotation clearance when the mechanism is kept compact. Besides, two motors which realize the degrees of freedom of forward swinging on hip and knee joints are both designed and arranged at the knee joints, thus optimizing the quality distribution of leg mechanisms and reducing the design difficulty of the hip joints with 3 degrees of freedom. The invention uses the parallel four-link mechanism to realize the mechanism design of upper legs and lower legs of the robot, so bottoms of the two feet of the robot are always parallel with the ground during walking, and the effect on the walking stability of the robot due to the rotation clearance of output shafts of the motors is effectively decreased.

There is provided an acetabular shell liner, and particularly a constrained liner, having a variable rim surface geometry to improve the range of motion of a femoral component within the liner and decrease the incidence of dislocation and subluxation. There are also provided methods of making and using the acetabular shell liner. Prosthetic devices, and particularly hip joint prostheses, containing the acetabular shell liner having a variable rim surface geometry are also provided.

The invention provides an underactuated lower limb assistance exoskeleton robot based on a rope-pulley mechanism, and relates to an underactuated lower limb assistance exoskeleton robot. The robot aims to solve the problems that a prior active joint-driving exoskeleton has large self-mass, large drive energy consumption, and a passive joint exoskeleton cannot provide effective assistance. The robot comprises a harness device, a drive control power system, two thigh bar devices, two leg bar devices, two ankle devices, two drive devices and two strings; wherein each drive device includes a motor shell bracket, a first motor shell, a waist frame, a planetary reducer, a second motor shell, a servo motor, a third motor shell, a hip joint spline shaft, a drive pulley, an elastic actuator, a first shaft sleeve, a small bevel gear, a large bevel gear, a second shaft sleeve, a fourth motor shell, a fifth motor shell, a sixth motor shell, a fixing plate and two first bearing end covers with bearings. The underactuated lower limb assistance exoskeleton robot based on the rope-pulley mechanism is used for the field of assistance exoskeleton robots.

Tools and methods for implanting hip resurfacing femoral prostheses along a path defined by the axis of a shaped femoral head surface are described. The prostheses are stemless partial ball components having an outer surface shaped to conform to an acetabular socket and may be a two part design having a mating sleeve component with an internal bore adapted to receive the shaped femoral head. The tools and methods are capable of accurately implanting both one and two piece ball components and sleeves without requiring the prosthesis to have a central stem or the preparation of a stem cavity in the femoral head and neck.