173 results about "Joints surgery" patented technology

A system improves the design of artificial implant components for use in joint replacement surgeries. The system includes an anthropometric static image data analyzer, an implant model data generator, a kinematic model simulator, and a dynamic response data analyzer. The implant model data generator may also use image data of a joint in motion for modification of the implant model data used in the kinematic simulation. Dynamic response data generated by the kinematic model simulation is analyzed by the dynamic response data analyzer to generate differential data that may be used to further refine the implant model data.

The invention includes a method and system for intra-operative navigation of a joint replacement operation, without recourse to pre-operative imagery of pre-operative computerized simulations. Trackable markers and a locating system are employed to track first and second bones. A computer receives positional information regarding the trackable markers and calculates (predicts) at least one suggested combination of components of a modular implant system to produce a desired post-operative skeletal relationship.

A broach handle for attachment to a broach comprising a distal working end and a proximal connector end, the proximal connector end comprising a bore extending distally into the broach, and a finger comprising a recess and extending proximally away from the broach, the broach handle comprising: a body having a distal end and a proximal end, the distal end being longitudinally and laterally offset from the proximal end and comprising a finger for seating in the bore of the broach and a bore for receiving the finger of the broach; a linkage connected to the body and comprising a finger for selective disposition in the recess of the finger of the broach; and a lever connected to the body and arranged to manipulate the proximal end of the linkage so that manipulation of the proximal end of the lever can lock and unlock a broach to the handle.

A patient specific system for joint replacement surgery that includes a custom cutting guide having an inner surface shaped to match the anatomy of a surface of a patient's joint to be resected. The custom cutting guide is designed for use with a corresponding prosthesis. A slot and guide holes are formed in the custom cutting guide corresponding to features protruding outwardly from a positive physical bone model. The slot guides a tool during resection of the femur to produce a first resected surface on the femur for mounting the prosthesis. The guide is formed from the positive physical model by applying a polymeric composition to the outer surface of the positive physical model including the features corresponding to the slot and guide holes of the custom cutting guide.

A surgical device for joint replacement surgery includes an intraoperative joint head having a stem attachment structure where the stem attachment structure may be removably attachable to a stem and a force sensor housed by the joint head for measuring in vivo forces during surgery. The in vivo forces may be generated by one or more of tension provided by soft tissue, load application during surgery, limb movement during surgery, and a combination thereof. Also, the joint head may provide a cavity where the stem attachment structure houses the force sensor and may be removably insertable in the joint head cavity. A method of performing joint replacement surgery includes installing an intraoperative joint head having a force sensor housed by the joint head and a stem attachment structure, the stem attachment structure being removably attachable to a stem, measuring joint forces, and adjusting an implant parameter based on the measured joint forces.

Embodiments of the present application relate generally to provisional orthopedic components, and specifically, to a trial system including a cam module (10) and a trial femoral component (100) that can be used during joint replacement surgery. The systems and methods described help a surgeon prepare a patient's bone to receive a permanent implant by providing a system that can be used to guide preparatory box cuts, and that can then be completed with a cam module (10)—without removal from the patient's bone—so that the same component can be used for the trialing process.

An acetabular impactor aids a surgeon in controlling the installation of an acetabular cup prosthesis having a central, female aperture. The impactor includes an impactor head, housing and a locking mechanism. The housing is attached to the impactor head, the housing enclosing a drive train having, at a far end, a prosthesis engaging thread, and at the opposite end, a handle which facilitates turning of the drive train by the operator. The locking mechanism is associated with the housing which selectively locks the drive train, and thus the prosthesis, in position. The opposite end of the drive train has a latch device which enables quick removal from the housing for cleaning and sterilization.

A method and system for utilizing a plurality of linear laser beams to project guidelines onto a skeletal joint for resection of the joint during surgical joint replacement procedures. The method comprises projecting a linear laser beam along the long axis of a limb at one end of the joint, utilizing the first beam as a benchmark for a second linear laser beam that is projected in an angular orientation to the first beam, and projecting a third beam in a parallel orientation to the second beam, which third beam provides the guideline for the resection procedure. The system comprises linear laser beam generating means with integrated leveling devices to allow for neutral positioning of the system prior to use. The system further includes a separate cutting block with a removable handle, wherein the handle includes its own integrated leveling devices. The cutting block is attached to the joint that is being resected in an orientation that is established by the linear laser beam guidelines.

A bone resection jig that can make ligament tension equal at extension and flexion positions without any actual measurements when resecting femur and tibia during artificial knee joint replacement surgery. The bone resection jig used in artificial knee joint replacement surgery includes a spacer block (1) comprised of a grip (6), a hollow box (7) that is provided on an other end side of the grip and has a vertical hole (7a) therein, and a reference spacer part (8) that extends out from the hollow box (7) and is adapted be inserted into the resection region between femur and tibia; a reference pin guide (2) which, when the femur and tibia are in the flexion position, is inserted into the vertical hole (7a) of the hollow box, extends on the reference spacer part (8) to the other end side of the grip so as to come into contact with a resection plane (F_H) of the tip of the distal end of the femur, and is formed with guide holes (9) for guiding reference pins (3) to be installed from a front side into the resection plane (F_H) of the tip of the distal end of the femur; and an aiming member (12) which is, after the spacer block (1) has been removed from a space between the femur and tibia leaving the reference pins (3), brought onto the reference pins (3) by being guided thereby, the aiming member being provided with an indicator (14) that indicates a resection plane (F_R) at a back of the distal end of the femur when the aiming member (12) comes into contact with the resection plane (F_H) of the tip of the distal end of the femur.

Devices and method for performing replacement prosthetic knee surgery are disclosed in which a spacing means is introduced between the femur (1) and tibia (2) while the patella (9) is in place. The spacing means separates the femur (1) from the tibia (2) by an amount essentially equal to or greater than the required flexion gap (4). An alignment device (26) is used for performing femoral bone cuts, which device attaches temporarily to a fitted tibial plate.

It has been discovered that pain felt in a given region of the body can be treated by stimulating a peripheral nerve at a therapeutically effective distance from the region where pain is felt to generate a comfortable sensation (i.e., paresthesia) overlapping the regions of pain. A method has been developed to reduce pain in a painful region following limb joint replacement by stimulating a peripheral nerve innervating the painful region with an electrode inserted into tissue and spaced from the peripheral nerve. This method may be used to help alleviate postoperative pain in patients following total knee arthroplasty surgery or other limb joint replacement surgeries.

An acetabular inserter (10) aids a surgeon in controlling the installation of an acetabular cup prosthesis (11) having a central, female aperture (13). The inserter includes an inserter head (20), a housing (12) and a locking mechanism. The housing (12) is attached to the inserter head, the housing enclosing a drive train (14) having, at a far end (134), a prosthesis engaging thread (124), and at the opposite end (42′), a handle (20) which facilitates turning of the drive train by the operator. The locking mechanism is associated with the housing which selectively locks the drive train, and thus the prosthesis, in position. The opposite end (42′) of the drive train has a latch device which enables quick removal from the housing for cleaning and sterilization.

A reamer for use in minimally invasive hip replacement surgical approaches is provided. The reamer spindle includes an offset elongate housing portion that extends from a proximal housing end portion a distal housing end portion. A handle assembly, preferably comprising a durable lightweight material such as carbon fiber that is removably connectable to the housing of the reamer spindle. A reamer head is removably connectable to the distal neck portion and has a surface configured to cut bone.

A clamp for attaching surgical operating aids has at least two clamp members arranged so as to be movable relative to one another and a securing element for fixing the clamp members in at least one locked position. The clamp members have a connecting mechanism that allow the clamp members to be attached to a separate setting element actuatable for transmitting a setting force onto the clamp. A setting element, such as tongs, releasably connects to the clamp, and has a connecting mechanism connectible to the connecting mechanism of the clamp and has a spacing and/or aligning mechanism. A clamp and a setting element that is releasably joined to the clamp provide an arrangement for attachment of surgical operating aids to a bone during a surgical intervention, such as during a joint replacement surgery.

The embodiment of the invention provides auxiliary positioning method, positioning device and system for joint replacement. The method comprises the following steps: acquiring the mapping relation between a three-dimensional model coordinate system of a joint and a visual space coordinate system of the positioning device; acquiring the pose of the joint site in the visual space coordinate system,and acquiring the pose of the tail end of a surgical instrument in the visual space coordinate system; based on the mapping relation, converting the poses of the tail end of the surgical instrument and the joint site in the visual space coordinate system into the three-dimensional model coordinate system; and displaying the joint site and the tail end of the surgical instrument in a virtual imageof the three-dimensional model coordinate system, thereby performing surgery auxiliary positioning based on the display result of the virtual image. Because a doctor can visually observe the relativeposition relation between the joint site and the tail end of the surgical instrument during surgical operation, the osteotomy accuracy is high, operating risk is decreased, and further the accuracy and matching degree of the mounting position of a prosthesis are improved.

The embodiment of the invention discloses a joint replacement surgery navigation system and method. The system comprises a preoperative planning module, and a navigation registration module, wherein the preoperative planning module is used for performing segmentation and reconstruction according to obtained hip joint medical image data to obtain a hip joint three-dimensional model, performing preoperative planning, and determining the placement position, size and angle of a prosthesis; and the navigation registration module is used for determining the spatial positions of the pelvis and the femur according to a pelvis reference frame and a femur reference frame, registering the hip joint three-dimensional model according to the spatial position relationship between an operation probe and the pelvis reference frame and the femur reference frame to obtain a hip joint solid model, and according to the hip joint solid model, controlling a surgical instrument for clamping the prosthesis to place the prosthesis in the hip joint. Through preoperative planning of information such as an operation approach and a prosthesis placement position, a spatial positioning method is used during an operation to track the operation instrument, navigation support is provided for a doctor while the operation accuracy is improved, and the operation is safer and more efficient.

Systems and methods are described herein to calculate implant orientation measurements of an acetabular cup implant in hip replacement surgery, such surgery performed with minimally invasive incisions. Surgeons may obtain real-time updated implant orientation measurements that compensate for pelvic tilt of a patient, such tilt measured pre-operatively. Implant orientation measurements may be measured from the patient's anterior pelvic plane, supine coronal plane, standing coronal plane or any other reference plane that the surgeon may find useful. Also disclosed are systems, methods and devices to measure hip center of rotation and provide leg length and offset measurements in hip replacement surgery.