40results about "Joint implants" patented technology

An article including a facet prosthesis at least partially mounted in a lumen artificially formed between superior and inferior halves of a facet joint, and an elastomeric cushioning element disposed in the facet prosthesis.

An intervertebral implant has two U-shaped inserts set over each other with a center piece in between. The two inserts each have an opposing base surface, two lateral side surfaces, and a contact surface. The contact surface has a channel configured to receive a spinal process of a vertebral body. The center piece has two resting surfaces corresponding respectively to each contact surfaces. The contact and resting surfaces each have corresponding structures that can engage each other such that the U-shaped inserts can each be fastened in a detachable manner to the center piece. The U-shaped inserts each have on the same lateral side surface connecting means to fasten the inserts to gripping elements of a surgical instrument. And the first and second structures can be engaged or disengaged only by the lateral side surface fitted with the connecting means.

A self-contouring spinal rod assembly. The assembly has a proximal end, a distal end, and a length extending between the proximal end and the distal end. A plurality of rod elements extend along the length, such that each of the plurality of rod elements is in contact with an adjacent rod element. The plurality of rod elements are fixed against movement relative to each other at the distal end. The plurality of rod elements are movable relative to each other along a length proximal the distal end. A method of assembling the spinal rod assembly is also provided.

Provided herein is a biocompatible implant for meniscus tissue engineering. Particularly, the biocompatible implant comprises a multi-layered crescent-shaped silk fibroin scaffold, in which each layer comprises distinct pore size and/or pore orientation, e.g., to mimic native meniscus complex architecture. Accordingly, the biocompatible implant can be used for repairing any meniscal defect or promoting meniscal regeneration in a subject.

Provided is a novel modular tibial prosthesis that includes an articulation component formed by direct pressure molding of a resin composition into a tibial tray component to provide a factory formed resin-metal composite structure a tibial tray module. The tibial tray component being capable of releasable attachment to an underlying keel element. A method of manufacture of the tibial prosthesis is also disclosed.

A medical instrument for holding and handling a surgical securing element has a proximal and a distal end. The surgical securing element includes a securing part and a holding part, and is assembled such that in an assembled disposition, the holding part for a connection element is movable in relation to the securing part. The instrument defines a longitudinal axis and includes a pulling part and, movable in relation to the latter in the direction of the longitudinal axis, a pushing part. The proximal end is temporarily couplable to the securing element in the assembled disposition. The instrument further includes an uncoupling device for actively transferring the instrument from a coupled position, in which the pulling part and the holding part are coupled, to an uncoupled position, in which the pulling part and the holding part are separable from one another.

A composite artificial joint with artificial cartilage structure features that an artificial cartilage structure layer made of polyvinyl alcohol hydrogel is arranged on the end face of a mechanical supporting unit, which may use a composite material structure body made of nano-hydroxy apatite and/or medical high-molecular material and/or porous mechanical supporting structure and contains the chtosan sponge carrying growth factor. The connection end of mechanical supporting unit and base bone has at least one convex fixing structure.

A prosthesis assembly is provided that includes a base member that has a helical structure and a cylindrical member opposite the helical structure. The cylindrical member is configured for direct connection with a reverse insert of a reverse shoulder assembly. The cylindrical member is configured for direct connection with a reverse insert spacer in some embodiments. The reverse insert can be inserted into a space defined at least in part by a wall of the cylindrical member and an inferior wall of the of the base member. The helical structure extends between a first end and a second end. The base member also can include one or more pathways. The pathway(s) is accessible from the second end and is directed toward the first end through the helical structure. The pathway is located inward of an outer periphery of the helical structure, e.g., adjacent to an inner periphery of the helical structure. The pathway extends in a space between successive portions of the helical structure. The prosthesis assembly can include a locking device that has a support member and an arm that projects away from the support member. The arm is configured to be disposed in the pathway when the support member is disposed adjacent to the second end of the base member. The arm is disposed through bone in the space between successive portions of the helical structure when the prosthesis assembly is implanted.

A method for arthroplasty includes using a self-locking prosthesis that has a member structured to transfer a load produced by the weight of a patient to a bone. An expandable bone-locking portion that is integral to the member includes a shape-memory material and expands to produce a locking force. A portion of the bone is removed to form an aperture in the bone. The bone-locking portion is inserted into the aperture, and a temperature increase causes a change from a contracted state to an expanded state resulting in expansion of the bone-locking portion so as to contact the inner surface. The expanding is sufficient to create a locking force at the junction between the inner surface and the bone-locking portion of the prosthesis and the majority of the locking force is applied at or above the metaphysis. The length/width ration of the prosthesis may be less than or equal to 5. The resulting reconstructed long-bone may have improved primary and long-term stability.

An apparatus for securing together first and second bone segments having peripheral surfaces comprising one or more bends. In some implementations the fixation device includes an elongate flexible strap having a proximal end and a distal end, the elongate flexible strap having a plurality of ratchet teeth disposed along an elongate distal portion thereof that function with a ratchet member within a locking head situated at the proximal end to permit the formation of a closed loop about the bone fragments. In some implementations the elongate flexible strap has a first elongate portion situated between the locking head and the elongate distal portion, the first elongate portion of the elongate flexible strap being more flexible than the elongate distal portion of the elongate flexible strap, the first elongate portion configured to extend across at least one of the one or more bends when the apparatus is in a secured state.

The invention relates to a combined artificial hip joint cup in a concave semi-arc shape. The combined artificial hip joint cup comprises an outer layer and an inner layer; the outer layer is provided with screw holes; the outer layer is made of biocompatible material; the inner layer is made of polyetheretherketone or its derivative polymer material; the inner layer and the outer layer are integrally fixed; the screw holes are covered by the inner layer. The joint of the surface of the PEEK (polyetheretherketone) inner layer and the outer surface of a different cup liner may reduce stress concentration and reduce the risk of fretting wear and liner damage; or the inner surface of the PEEK inner layer and the outer surface of a femoral prosthesis directly form a friction pair, decreasing wear of the outer surface of the femoral prosthesis. The surface of the PEEK inner layer has the advantages of corrosion resistance and fretting wear resistance, and the release of existing metal ions and granules of metal prostheses, causing harm to the human body, is avoided.

A method for visualizing at least one region of a joint that deviates from a baseline anatomy includes receiving image data associated with a joint of a subject, generating a three-dimensional model of at least a portion of the joint using the image data, identifying at least one region of the joint that deviates from the baseline anatomy by comparing the three-dimensional model to a baseline model, generating a measurement of a characteristic of the joint at one or more predefined locations using the three-dimensional model and a coordinate system, and generating a three-dimensional rendering of the model that includes a visual indication of the at least one region of the three-dimensional model that deviates from the baseline so that the region is visually indicated according to degree of deviation, and a representation of the measurement of the characteristic of the joint that is positioned according to the predefined locations.

A process for performing lumbar laminectomy is characterized by leaving the muscles intact along the base of spinous process and posterior faces of detached portions of lamina, facet joints, and transverse processes of at least one of adjacent superior and inferior vertebrae to preserve the blood flow to the detached portions and, thus, to create a living peace of bone used as fusion material between the bases of the transverse processes of the superior and inferior vertebrae.

A tissue engineering scaffold of interconnected and bonded fiber having a property with a value that is spatially distributed in at least two regions is provided. The scaffold has at least two regions with properties, such as porosity, strength, elastic modulus, osteoconductivity, and bioactivity that can be controlled and modified through fabrication processes that alter the pore size, pore size distribution, composition, and bonding of fiber and other additives. The value of the property can be provided with a gradient between each of the adjacent spatially distributed regions.

A coupling assembly for use in surgical constructs comprises a first body and a second body. One of the first body and the second body includes a male member and an other of the first body and the second body includes a female member. The male member is sized and shaped to be received within the female member and the female member has an internal bore sized and shaped to receive the male member therein. A raised portion is formed on or attached to the male member. An area of decreased diameter is associated with the internal bore of the female member. The first and second bodies are coupleable to one another by an interference fit when the raised portion of the male member is positioned within the area of decreased diameter associated with the internal bore of the female member.

The invention provides a liner trial mold used for unicompartmental knee arthroplasty operation and a matched use method. The liner trial mold is used for solving the problem that the trial mold of the pad is easy to damage the peripheral ligament and fascia in the prior art. The two ends of the connecting rod in the invention are respectively connected with a handle and a mold test unit. The moldtest unit comprises an elastic sheet which automatically adjusts the thickness and sends out an alarm. The mold test unit is threadably connected with the handle. The surface of the test mold unit comprises a hard bottom disk surface and a prismatic surface made of a flexible material, wherein the prismatic edge is provided with a support, the elastic sheet is arranged in the prism-shaped internal cavity, and the two sides of the elastic sheet are provided with positioning clamping grooves. The surface of the test mold unit comprises a hard bottom disk surface and a prismatic surface made offlexible material. The liner trial mold has the advantages of avoiding the potential safety hazard caused by forgetting to pull out the test mold of the cushion, being light in material, convenient inuse and convenient for medical personnel to observe and obtain the results.

The invention provides a fully transparent expandable channel system for spinal endoscope-assisted lumbar fusion. The expandable channel system comprises an outer sleeve, an inner sleeve and a step-by-step guide rod, wherein main bodies of the outer sleeve and the inner sleeve are both of semicircular structures; the inner sleeve is sleeved in the outer sleeve and can freely rotate in the outer sleeve along the radial direction; and the step-by-step guide rod penetrates into the inner sleeve. The expandable channel system is used for solving the problem of interbody fusion cage insertion in anendoscope-assisted lumbar fusion process, and damage to walking nerve roots and outlet nerve roots are avoided, so that operation efficiency is greatly improved, fusion efficiency of percutaneous endoscope-assisted endoscope fusion can be effectively improved, and operation safety is greatly improved.

A forward power converter with a self-excited synchronous rectifying circuit makes use of the self-excitation function of a transformer to generate electric energy at a secondary side winding coil of the transformer, hence controlling an n-channel FET to accomplish synchronous rectification. In the synchronous rectifying circuit, the drain of the n-channel FET is connected to an end of the secondary side of a first transformer, the source of the n-channel FET is connected to a positive end of a flywheel diode, the negative end of the flywheel diode is connected to the other end of the secondary side of the first transformer, a control end of the n-channel FET is connected to an end of an induction coil via a resistor and a capacitor, and the other end of the induction coil is connected to the source of the n-channel FET.

The invention discloses a measuring method for an inclination angle of a lower limb lateral force line based on a single navigation module, and belongs to the field of orthopedic inclination angle detection. According to the method, an orthopedic locator is fixed to a distal femur by using fixing nails, the lower limb force line navigation module is stuck into the orthopedic locator, and motion parameters are measured through the navigation module; a fixing unit is fixed on a tibia, and a position between a medial malleolus and a lateral malleolus of the bottom of the tibia is used as a measurement initial position of a sensor; and a connecting rod is driven to move to make a touch unit respectively contact with the initial position, the medial malleolus and the lateral malleolus of the bottom of the tibia, the obtained motion parameters are measured by the navigation module, so that an inclination angle of the tibia and an inclination angle of the femur can be accurately measured, andthe lower limb lateral force line can be determined.

A limb support device includes a variable stiffness mechanism. The limb support device can be an orthotic or prosthetic device. The variable stiffness mechanism can include, for example, a rate-sensitive or speed-dependent material or a damping mechanism. The variable stiffness mechanism causes the limb support device to exhibit different properties when the user of the limb support device is walking at high or fast walking speeds compared to low or slow walking speeds. The limb support device can exhibit high damping and energy absorption, and therefore stability, at slow speeds, and high energy return at faster speeds.

The invention belongs to the technical field of medical treatment and particularly discloses a manufacturing process for a surface replacement femoral head and the femoral head. The femoral head comprises a femoral handle and a femoral head body, wherein a replacement fixed cavity pointing to the femoral handle is formed inside the femoral head body, a replacement cut surface is polished on the surface of the femoral head body, a replacement femoral head surface is fixedly mounted on the surface of the replacement cut surface and comprises a replacement surface and an insertion rod, the replacement surface is in tight fit with the replacement cut surface, a fitting cavity in fit with the femoral head body is formed inside the replacement surface, and the insertion rod is arranged between the interior of the fitting cavity and the middle part of the replacement surface. According to the manufacturing process and the femoral head, the femoral head is scientific and reasonable and is safeand convenient in use; and a replacement prosthesis is improved and is composed of the replacement surface and the insertion rod, the replacement surface can be manufactured by using a forging process, the strength and wear resistance of the replacement surface are improved, the insertion rod can be manufactured and produced by using any manufacturing process, and the cost of production manufacturing is reduced.