40 results about "Knee ligament" patented technology

A method for reconstructing a knee ligament and for performing a tibial osteotomy on the knee in a single procedure, the method comprising:forming a bone tunnel through the tibia at a location appropriate for the ligament reconstruction, disposing a graft ligament in the bone tunnel, and securing the graft ligament in the bone tunnel, and forming a wedge-like opening in the bone at a location appropriate for the tibial osteotomy, positioning an osteotomy implant in the wedge-like opening in the bone, and securing the osteotomy implant in the wedge-like opening in the bone;wherein the osteotomy implant is secured in the wedge-like opening in the bone with a fastener which extends through the implant and into the bone tunnel.

Surgical anchoring systems and methods are employed for the correction of bone deformities. The anchoring system and its associated instrument may be suitable for surgical repair of hallux valgus, tarsometatarsal sprains, ankle ligament reconstruction, spring ligament repair, knee ligament reinforcement, acromioclavicular sprains, coracoclavicular sprains, elbow ligament repair, wrist and hand ligamentous stabilization or similar conditions. The anchoring system may include a fixation system for anchoring two or more sections of bone or other body parts and a system for aligning of one section relative to another section.

A method and construct for joint repair in which attachment of a double bundle graft ligament approximates anatomic orientation using interference fixation in a single bone tunnel. The double bundle graft features separable strands. A threaded screw is inserted between the separable strands and provides interference fixation of the graft against radially opposing walls defining the bone tunnel. Attachment of the graft using separated strands more closely approximate the configuration of the native ligament. The resulting reconstruction exhibits mechanical functionality that more accurately mimics that of the intact joint, with a minimum of associated tissue morbidity.

A method for setting the internal-external rotational position of a prosthetic femoral component with respect to the tibial comprising: forming a cylindrical surface on the posterior femoral condyles, said cylindrical surface formed about an axis extending in a proximal distal direction with respect to the femur; placing a template having a cylindrical guide surface for engaging said posterior femoral condyles against a planar resected surface of the distal femur with said guide surfaces in contact with said cylindrically shaped posterior condyles; and rotating said template on said cylindrical guide surface as the knee joint is moved from flexion to extension until the template cylindrical guide surfaces are in a position with respect to the tibial condyle surfaces to properly balance the knee ligaments.

Surgical anchoring systems and methods are employed for the correction of bone deformities. The anchoring system and its associated instrument may be suitable for surgical repair of hallux valgus, tarsometatarsal sprains, ankle ligament reconstruction, spring ligament repair, knee ligament reinforcement, acromioclavicular sprains, coracoclavicular sprains, elbow ligament repair, wrist and hand ligamentous stabilization or similar conditions. The anchoring system may include a fixation system for anchoring two or more sections of bone or other body parts and a system for aligning of one section relative to another section.

Methods and systems are described to quantitatively determine the degree of soft tissue constraints on knee ligaments and for properly determining placement parameters for prosthetic components in knee replacement surgery that will minimize strain on the ligaments. In one aspect, a passive kinetic manipulation technique is used in conjunction with a computer aided surgery (CAS) system to accurately and precisely determine the length and attachment sites of ligaments. These manipulations are performed after an initial tibial cut and prior to any other cuts or to placement of any prosthetic component. In a second aspect, a mathematical model of knee kinematics is used with the CAS system to determine optimal placement parameters for the femoral and tibial components of the prosthetic device that minimizes strain on the ligaments.

A guide pin guiding device, for guiding a guide pin when a bone hole for a PLB is prepared in the femur, includes an insertion portion, for being inserted into a bone hole for the AMB prepared in the femur, at one end of an elongate main body thereof. The elongate main body is formed with a guide pin insertion hole for the guide pin to be inserted therein to prepare a bone hole for the PLB in the femur. The guide pin insertion hole is open to the outside of the elongate main body. The guide pin insertion hole includes a guide pin guiding portion and a slot portion extending from the guide pin guiding portion to the side edge of the elongate main body. In addition, a reamer guiding device for guiding a reamer when preparing a bone hole for the PLB in the femur can be used with the guide pin guiding device.

A specialized obturator that has a curved configuration designed specifically for entry through the anterior joint and out the back of the knee in the ideal position for a posterior portal. The curved obturator is shaped to avoid intact knee ligaments and femoral condyles. The obturator is provided with an eyelet located at the tip and may be employed with a cannula similar to a PassPort™ Button cannula, but with one or more sutures placed through the “neck” behind the collar. A standard “inside-out” cannula may be used as well, but dimensioned for the specialized obturator.

Disclosed herein are novel contact sensors. The contact sensors disclosed herein include a conductive composite material formed of a polymer and a conductive filler. In one particular aspect, the composite materials can include less than about 10 wt % conductive filler. Thus, the composite material of the contact sensors can have physical characteristics essentially identical to the polymer, while being electrically conductive with the electrical resistance proportional to the load on the sensor. The sensors can provide real time dynamic contact information for joint members under conditions expected during use. In one particular aspect, the sensor can be used to properly balance the knee ligaments in a total knee replacement surgery.

A device for measuring displacement of the tibia in relation to the femur in response to an applied force or torque on the tibia. A first shaft is tiltable about a first axis close to the ankle and approximately parallel to the coronal plane of the patient's body. A second shaft is connected to the first shaft and is rotatable about a second axis perpendicular to the first axis, and is close to the ankle and approximately parallel to the tibia. A foot support platform is mounted on the second shaft, the foot support platform being configured for attachment of the foot at a fixed position. A displacement test device is provided for applying forces to the tibia and measuring the shift or displacement of the proximal tibia relative to the distal femur.

The invention relates to a surgical guide (1, 1′) for implanting a knee prosthesis, advantageously capable of allowing the intraoperative balancing of the knee ligaments, comprising: a first component (G1, G1′) intended for uniquely coupling with the distal epiphyseal end (Ed) of a femur (Fe); a template (Gr, Gr′) rotatably mounted with respect to said first component (G1, G1′) and intended for guiding a marking operation of said distal epiphyseal end (Ed) aimed to determine the position of a knee prosthesis to be implanted; and a second component (G2) intended for solidly coupling said template (Gr, Gr′) with a proximal epiphyseal end (Ep) of a tibia (Ti) corresponding to said femur (Fe).

A system and method for determining laxity in an anatomical joint. The system includes a force sensor that measures a force applied to an appendage that is coupled to a joint and a position sensor that determines the amount of movement of the appendage when the force is applied to the appendage. The system also includes a system controller that is connected to both the force sensor and the position sensor and allows communications between the sensors.

Anterior cruciate ligament (ACL) is the most commonly injured knee ligament in sports-related activities, especially in pivoting sports. Considering that the knee is free to flex / extend but has much more limited motions about the off-axes (tibial rotation and valgus / varus), ACL injuries are often associated with excessive off-axis loadings. A pivoting / sliding mechanism combined with sagittal plane movement / exercise is described as a diagnostic tool to evaluate off-axis neuromechanical and anatomical risk factors of noncontact ACL injuries. The pivoting / sliding mechanism is also described as an intervention tool for off-axis training, possibly based on the diagnosis, to reduce the incidence of ACL injuries. Training outcome can also be evaluated using the pivoting / sliding mechanism. In general, the pivoting / sliding mechanism can be used with many sagittal plane exercise machines and used to improve off-axis control of the lower limbs and reduce lower limb injuries.

The invention relates to an intelligent power assisting system, wherein a power system arranged on a fixing plate comprises a controller for controlling an overall drive system to provide kinetic energy; a battery is arranged on the controller; the upper end of the controller is connected with a universal intention sensor through a connection lead; the lower end of the controller is connected with a large-torque motor; the two ends of an output shaft of the large-torque motor are connected with electric clutches; a gear is externally connected with the electric clutches and connected with a transmission gear ring; a push rod is connected to the lower end of the transmission gear ring; a reversing joint is arranged on the push rod; a gear joint is connected with the other end of the push rod; the lower end of the gear joint is connected with a shoe fixing frame through an ejection rod, and a pressure sensor for detecting the weight of a human body to determine power output of the large-torque motor is arranged at the lower end of the shoe fixing frame. The intelligent power assisting system has the characteristics that the intelligent power assisting system is strong in practicability and convenient to use, can be used for physical exercises as well as upward movement of a person, and can be electrically or manually controlled to slowly descend when going downhill, and the downhill security and protection of a knee ligament are guaranteed.

The invention provides a device for protecting ligaments in a knee joint of a user. The device includes a knee brace positionable about a knee joint of a user and a foot member wearable on a foot of a user. Additionally, the device includes a flexible tether member including a first coupling element coupled to the knee brace and a second coupling element coupled to the foot member. The foot member and knee brace are attachable and detachable via the first and second coupling elements. The flexible tether member is adjustable in length to dispose the flexible tether member in tension at least in a portion of a maximum foot range of rotation, where the maximum foot range of rotation of the user's foot relative to the knee joint causes hyperextension of a knee ligament.

The invention discloses a method for fixing a graft in cruciate ligament reconstruction of the knee joint, which comprises the following steps: (1) braiding and suturing the two ends of the grafted tendon with wires, and selecting two expansion screws; (2) making a femoral tunnel; (3) ) making the tibial tunnel; (4)) threading the guide wire at one end of the transplanted tendon into the guide pin with a coccyx hole, pulling out the guide pin with a coccyx hole and taking out one end of the guide wire, so that the transplanted tendon enters the femoral tunnel and the tibial tunnel; (5) Use tools to push in the expansion sleeve along the femoral bone canal close to the grafted tendon until the tail end of the expansion sleeve enters the femoral bone canal, screw the screws into the expansion sleeve for fixation; (6) use tools to push in the expansion sleeve close to the grafted tendon along the tibial bone canal When the tail end of the expansion sleeve enters the tibial bone canal, screw the screw into the expansion sleeve for fixation. The graft fixation method in knee cruciate ligament reconstruction of the present invention is more conducive to tendon-bone healing, can produce greater fixation strength, and can avoid the disadvantages of host immune response caused by exogenous cells and low transformation efficiency.

Instruments, implants and methods to concomitantly perform unicompartmental knee resurfacing and cruciate ligament reconstruction procedures. Unicondylar knee resurfacing is conducted with concomitant knee ligament reconstruction (such as, for example, GraftLink® All-Inside ACL Reconstruction using TightRope® ABS) and employing retrograde drilling. Retrograde drilling, which starts at the level of the resurfacing implants and travels away from the joint line and resurfacing implants, allows for more precise placement of the drill holes and also the drill trajectory, to avoid undermining the resurfacing implants. Retrograde drills also allow the surgeon to see the drill hole footprint at the joint line and resurfacing implant level more accurately, so the surgeon can place the starting point of the drill hole away from the resurfacing implants.

The invention provides a medical knee ligament fixing and correcting device, belongs to the technical field of medical apparatus and instruments, and solves the technical problems that a leg fixing device is cumbersome and unadjustable and has no correcting excise capacity. The medical knee ligament fixing and correcting device comprises a waist locking belt and knee mechanisms, wherein a first connecting block and a second connecting block are fixed on the two sides of the waist locking belt, first connecting rods are fixed at the lower ends of the first connecting block the second connectingblock, locking mechanisms are arranged on the inner and outer sides of the two knee mechanisms respectively, the locking mechanisms located on the outer sides are rotationally connected with the first connecting rods, the locking mechanisms located on the inner sides are rotationally connected with second connecting rods, and a first leg mechanism and a second leg mechanism are arranged below thesecond connecting rods respectively. Through matching of the locking mechanisms, the first connecting rods and the second connecting rods, the fixing angle can be adjusted according to demands so asto execute correcting exercise of knee ligaments, and the first connecting rods and the second connecting rods have small body size and are more portable.