30 results about "Prosthesis" patented technology

A prosthetic stented heart valve which includes a compressible and expandable stent structure having first and second opposite ends, an expanded outer periphery, and a compressed outer periphery that is at least slightly smaller than the expanded outer periphery when subjected to an external radial force. The valve further includes a valve segment comprising a dual-layer sheet formed into a generally tubular shape having at least one longitudinally extending seam, and a plurality of leaflets formed by attachment of an outer layer of the dual-layer sheet to an inner layer of the dual-layer sheet in a leaflet defining pattern. The valve segment is at least partially positioned within the stent structure. The valve may further include at least one opening in the outer layer of the dual-layer sheet that is spaced from both the first and second ends of the stent structure.

A heart valve prosthesis that can be quickly and easily implanted during a surgical procedure is provided. The prosthetic valve has a base stent that is deployed at a treatment site, and a valve component configured to quickly connect to the base stent. The base stent may take the form of a self- or balloon-expandable stent that expands outward against the native valve with or without leaflet excision. The valve component has a non-expandable prosthetic valve and a self- or balloon-expandable coupling stent for attachment to the base stent, thereby fixing the position of the valve component relative to the base stent. The prosthetic valve may be a commercially available to valve with a sewing ring and the coupling stent attaches to the sewing ring. The system is particularly suited for rapid deployment of heart valves in a conventional open-heart surgical environment. A catheter-based system and method for deployment is provided.

A stent delivery system and method for intraluminal delivery and deployment of a self-expanding prosthesis at a site within a body canal is provided. The delivery system comprises a housing removably attached to a delivery tool. The housing stores the self-expanding prosthesis in an expanded state. The delivery tool has a catheter assembly with a capture zone. The capture zone receives and contains the self-expanding prosthesis in a compressed state. A securing mechanism couples the catheter assembly to the self-expanding prosthesis, wherein the securing mechanism transfers the self-expanding prosthesis from the housing to the capture zone immediately prior to the delivery and deployment procedure.

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.

A flexible prosthetic tissue-type heart valve having commissures that are substantially decoupled from a cusp support structure. The valve includes three leaflets having arcuate cusp edges and opposed concave shaped free edges, with outwardly-directed attachment tabs therebetween. A cusp support structure in either one or more pieces attaches to the leaflet cusp edges. Three commissures are each formed partly with an axially-extending insert member to which two adjacent leaflet tabs attach. An inverted V-shaped clip maintains close contact between the adjacent leaflet tabs and provides a stress-relieving clamping action in conjunction with the insert member. The insert member attaches about its lower end to base sections of the cusp support structure, or to an intermediate sewing ring, so that the commissures may pivot about the cusp support structure.

A dental CAD/CAM system forms a custom dental preparation guide for guiding a dental tool that alters a shapes a tooth structure to which a custom prosthetic dental item is to be attached. The system acquires an optical measurement and an x-ray of at least one dental structure. The system correlates the acquired optical measurement and the x-ray to form a model of the at least one dental structure. The system generates a model of a reduced tooth structure based on the model of the at least one dental structure. The system also provides at least one dental preparation guide based on the model of the reduced tooth structure.

A liner for use with a prosthesis has a height and an area and comprises an optional inner layer, a cushion layer affixed to the inner layer, an outer layer affixed to the cushion layer, and an optional bead affixed to at least one of the layers and defining the upper edge of the liner, wherein the cushion layer has an area that is less than less than 90% of the area of the liner. The cushion layer may extend from the upper edge of the liner or from the bottom of the liner to a point between the top and bottom edges, or may be present only desired portions of the liner area.

A method for designing a digital abutment for a dental implant includes the steps of: a) implant planning where implant planning is initiated based on digital data obtained from the patient and loaded into a computer system to enable an implant fixture to be implanted at the implant site in the best position, b) establishment of digital reference abutment where a digital reference abutment is established at the implant site and positioned on the implant fixture, c) adjustment of the digital reference abutment where the digital reference abutment has a subgingival part and a supragingival part at the top side of the subgingival part, and the angle between the subgingival part and the supragingival part is adjusted based on the best prosthesis position, and d) finish of digital abutment where the digital reference abutment becomes a digital abutment for placement after the adjustment.

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.

Apparatus for the fast angular orientation of a surgical instrument with respect to an implantation seat of a prosthesis in a patient's bone, of the type comprising a moving sensor, which may be associated with the surgical instrument, and a fixes sensor, which may be integrally fastened to the bone during a surgical operation, the moving sensor and the fixed sensor being provided with a position detection device and with a device for signaling of the detected position to a central memory and processing unit. The central memory and processing unit comprises calibration device which detect the position of the moving sensor when it is associated with a line passing through two known points of the bone and, simultaneously, they detect the position of the fixed sensor when it is integrally fastened to the bone, and they record such position as initial work position.

A heart valve prosthesis includes a valve member having an inflow end, an outflow end, and a generally cylindrical sidewall portion extending between the inflow end and the outflow end. The valve member includes at least one leaflet moveable relative to the sidewall portion to provide for substantially unidirectional flow of fluid through the valve member. A support of a substantially flexible material positioned is around the sidewall portion. A strip of pliant material is provided around valve member intermediate the inflow end and the outflow end of the valve member in a generally overlying relationship with the support. A covering is provided over a radially outer exposed surface of at least the strip.

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 improved delivery system for an implantable medical device includes a retention sheath for an implantable medical device. The retention sheath includes a central lumen extending from a proximal end to a distal end of the retention sheath, and a tapered portion disposed at a distal end of the retention sheath. The tapered portion of the retention sheath includes a first layer made of a low-friction material. The first layer may be movable from a compressed, folded configuration in an initial position, to a substantially uncompressed and unfolded configuration in a deployment position. The retention sheath also includes a second layer made of an expandable material. The second layer is disposed radially outward of and in contact with the first layer, and the second layer is configured to expand in a substantially radially outward direction when the first layer moves from the initial position to the deployment position.

The present invention relates to systems and methods for preparing the trochlear groove of a patient's femur to receive a prosthesis thereon. In the system, a combination drill-and-alignment guide includes at least a proximal and intermediate section, and preferably also includes a distal section. Guide holes for receiving guide pins therein are located in the proximal and distal sections of the guide. After the guide is positioned using at least one of several visual and/or tactile references in the system, the guides pins are placed through the guide holes of the guide and into bone. The guide may then be removed and replaced by cannulated reamers that are rotated and used to resect a predetermined amount of bone around the guide pins. A prosthesis having at least a portion of an outer surface that substantially matches the trochlear groove of the patient in a pre-degenerated state is then implanted on the resected bone.

Methods are provided for generating intraluminal prosthetic implants designed to fit onto specific anatomical locations within regions which are stable in terms of their motion in time.

Apparatus and methods are described herein for use in the delivery of a prosthetic mitral valve. In some embodiments, a method includes after deploying a prosthetic mitral valve within a mitral annulus of a heart, inserting a delivery sheath into the patients body and disposing a distal end near the apex of the heart. A tissue dilator device can be inserted through a lumen of the delivery sheath and used to dilate tissue near the apex of the heart to create space for an epicardial pad device. After dilating the tissue, the tissue dilator device can be removed and an epicardial pad device can be attached to a tether extending from the prosthetic valve. The pad can be secured at the apex of the heart to secure the prosthetic valve and tether in a desired position. In some embodiments, the epicardial pad device can be an expandable epicardial pad device.

Screw (100), surgical driver (400), kit and torque key (500) to fix a prosthesis (200) on a dental implant (300). The screw (100) has a pin comprising fixing means arranged to fix the screw (100) in the implant (300) in a detachable way; a head, to house the prosthesis (200). The head comprises a protruding area which is mostly spherical and has curved-concave meridional sunken areas (110) to receive a grip (410, 510) of a handling tool (400, 500) for the screw (100); with a latitude between ±80°, with respect to the equator (E) of the head. The surgical driver (400) has a work part comprising fastening means with a shape which combines with the shape of the head of the screw (100). The kit comprises the surgical driver (400), the screw (100) and a protective cap (450). The torque key (500) has a similar configuration to that of the surgical driver (400).

A middle ear ossicle prosthesis in which the component for ossicular attachment comprises a surface bearing a plurality of discrete projections facing the ossicle to which it is attached which minimize total contact between the prosthesis and the ossicle. The prosthesis may comprise a loop forming a partial circle for encircling an ossicle, a piston for transmitting vibrations from the loop to the inner ear, and a rod solidly connecting the loop to the piston. The loop may have an upwardly turned end to facilitate placement of the loop over the ossicle. The projections may be provided in one row, two rows, or may be otherwise arrayed, and may be dissimilar from one another in configuration and dimensions.

Presented herein are techniques for dynamically setting, in real-time, a ratio of acoustical stimulation signals to electrical stimulation signals delivered by a hearing prosthesis. The ratio of the acoustical stimulation signals to the electrical stimulation signals is set based on one or more characteristics or attributes of the input sound signals that are received and processed by the hearing prosthesis in order to generate the acoustical and electrical stimulation signals.

An endoluminal prosthesis system for being deployed in a patient's aorta near the heart includes a graft having a tubular body with a lumen extending from proximal end configured to be deployed near a patient's heart to a distal end configured to be deployed away from the patient's heart. A collar around the graft is sized and configured to be sutured to a patient's aorta. Passageways in the middle portion of the graft permit fluid communication from the lumen of the graft to an exterior of the graft. A respective bridging branch is disposed at each of the passageways, each of the bridging branches having an inner opening and an outer opening so that the bridging branches provide fluid communication from the lumen of the graft to the exterior of the graft. A respective bridging graft is sized and arranged to mate with each of the bridging branches.

Thus, a method is provided for substantially decreasing the failure of a bioprosthetic implant in a human being. The method comprises providing a lipid lowering medication. Then, the human being is treated with the lipid lowering medication to substantially decrease the bioprosthetic implant failure and substantially lowering the need for bioprosthetic implant replacement. Preferably, the lipid lowering medication is a statin, and more preferably the lipid lowering medication is a HMG CoA reductive inhibitor (3-hydroxy-3 methyl-glutamyl coenzyme A reductase inhibitor).

The invention discloses a real-time imaging contrast method of a C-arm X-ray film machine based on a 3D model, which belongs to the technical field of picture processing. According to the invention, the 3D model of a prosthesis at a hip replacement surgery site is constructed, during a surgery, a position sensing device is used to determine a deflection angle. According to the obtained deflectionangle, a corresponding control prosthesis implant picture matching a current surgical angle is obtained by projection, the picture is used as the contrast of the image formed during the placement of the prosthesis during the surgery to confirm the accuracy of the placement of the prosthesis and the deviation angle, the technical problem of low imaging accuracy of the C-arm X-ray film machine is solved, The 3D model constructed by the present invention can adapt to various situations during the surgery, and obtained corresponding projection maps according to different deflection angles can be used as surgical comparison, which can ensure accuracy and reduce risk. The invention uses a projection function to attenuate a voxel matrix, which can simultaneously obtain the surface and internal information of the 3D model, and is convenient for judging the direction of implant.

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 instruments, and particularly relates to a titanium alloy artificial finger joint which comprises a first knuckle prosthesis, a connecting seat is arranged at the top of the first knuckle prosthesis, a second knuckle prosthesis is arranged above the connecting seat, a mounting groove is formed in the spherical surface of the bottom of the second knuckle prosthesis, and the connecting seat is connected between the inner walls of the two sides of the mounting groove through a pin shaft. Two first insertion columns are arranged at the top of the second knuckle prosthesis, the first insertion columns and the second knuckle prosthesis are of an integrated structure, first insertion holes are formed in the tops of the first insertion columns, the bottoms of the first insertion holes penetrate through the second knuckle prosthesis, first internal threads are formed in the inner walls of the first insertion holes, and two second insertion columns which are symmetrically distributed at the two ends are arranged at the bottom of the first knuckle prosthesis; a second inserting hole is formed in the bottom of the second inserting column, and a second internal thread is formed in the second inserting hole. According to the invention, the firmness after fixation can be effectively improved through butt joint of the anti-falling columns and the corresponding holes in the phalanx and fixation through the screws.

A dental prosthesis having a guide hole formed therein. The guide hole is configured to guide a drilling for a screw, and configured to receive the screw, holding the prosthesis in place when screwed into the bone of a patient.

The invention relates to composite materials based on tungsten carbide and comprising gold, palladium and/or platinum and to a method for producing said composite materials by sintering. By means of the FAST method, hard and biocompatible WC/(Au, Pd, Pt) composite materials can be produced, inter alia for use as coatings on tools and prostheses and as solid bodies in, for example, blood pumps.

The present disclosure relates to a prosthesis for dental replacement, the prosthesis includes a root. The root includes an abutment and a base portion. The abutment is adapted for affixation of a dental crown thereto. The base portion is shaped for insertion into a tooth socket. The base portion includes a core, a metallic oxide layer on the core and a film-like stem cell layer on the metallic oxide layer. The metallic oxide layer has a number of holes.