505results about "Ankle joints" patented technology

The invention relates to the technical field of joint prostheses, in particular to an ankle joint prosthesis implantation system based on zirconium-niobium alloy, which comprises a tibia prosthesis (10), a talus prosthesis (30) and a liner (20), the tibia prosthesis (10) and the talus prosthesis (30) are both made of zirconium-niobium alloy material and are integrally formed by 3D printing, the tibia prosthesis (10) comprises a tibia body (101), and the liner (20) is arranged on the tibia body (101). The first bone contact layer (100) is integrally formed on the tibia body (101), and the first bone contact layer (100) is of a porous structure of which the pore diameter is gradually reduced from outside to inside; the talus prosthesis (30) comprises a talus body (301) and a second bone contact layer (300) integrally formed on the talus body (301), and the second bone contact layer (300) is of a porous structure with the aperture gradually reduced from outside to inside.

An example method includes obtaining, by one or more processors, a target atlas of a particular patient on which an arthroplasty procedure is to be performed; selecting, by the one or more processors and based on a comparison of values of the target atlas and a plurality of reference atlases of other patients on which the arthroplasty procedure has been performed, at least one reference atlas of the plurality of reference atlases of the other patients; and determining, by the one or more processors and based on the selected at least one reference atlas, one or both of an implant size and an implant alignment for the particular patient.

An ankle joint replacement prosthesis comprises a tibia prosthesis assembly and a talus prosthesis, the tibia prosthesis assembly comprises a tibia prosthesis body and a cushion block, the tibia prosthesis body and the cushion block are in an arc shape with the middle bent upwards on the sagittal plane, the cushion block is arranged at the bottom of the tibia prosthesis body in a sleeving mode, and the surface of the upper portion of the tibia prosthesis body is a tibia joint face. The surface of the lower portion of the cushion block is a first articular surface, the surface of the upper portion of the talus prosthesis is a second articular surface, the second articular surface is in an arc shape with the middle bent upwards on a sagittal plane, the surface of the lower portion of the talus prosthesis is a talus joint surface, and the first articular surface is matched with the second articular surface. When the prosthesis is implanted, only the articular cartilage and the subchondral bone need to be treated at the far end of the tibia, so that the bone at the far end of the tibia is reserved to the maximum extent, the anatomical integrity of the bone is guaranteed, the stability of the prosthesis is enhanced, the service life is prolonged, and the clinical operation effect is improved.

A method of ankle replacement includes forming an anterior cut in a bone and forming a stem hole in a distal end of the bone. The stem hole is formed using a plurality of broaches positioned against the distal end of the bone through the anterior cut. A first portion and a second portion of a stem implant are inserted into the stem hole through the anterior cut in the bone. The first portion is coupled to the second portion using a coupling device inserted through the anterior cut in the bone. The stem implant is impacted into the stem hole using an offset impactor.

An instrument includes a housing having a first end, a second end, and a body disposed therebetween. The housing also includes a first opening positioned at the first end, and a second opening positioned at the second end, with the first opening and the second opening positioned about a common longitudinal axis. The instrument also includes a first drive shaft received at least partially within the first opening and extending into the housing and a second drive shaft disposed at least partially within the housing. The instrument also includes an engagement member extending at least partially from the second opening of the housing.

The utility model provides a multi-curvature ankle joint prosthesis which comprises a tibia prosthesis connected with a tibia, a talus prosthesis connected with a talus and a cushion block with one side connected with the tibia prosthesis, a joint contact surface is arranged on the other side of the cushion block, and a talus contact surface matched with the joint contact surface is arranged on one side of the talus prosthesis. The curvature of the sagittal plane Z in the talus contact face is reduced from front to back, and the instantaneous rotation center of the talus prosthesis on the joint contact face is in an arc shape. According to the multi-curvature ankle joint prosthesis, the talus contact face and the anatomical structure of the human body are high in consistency, the natural form and the motion mode of the ankle joint are accurately restored, the ankle joint prosthesis better conforms to biomechanics and kinematics in the motion process, the motion stability of the human body is improved, local friction stress of the ankle joint prosthesis is smaller, and the ankle joint prosthesis is more stable in motion. And the service life of the ankle joint prosthesis is prolonged, so that the durability of the ankle joint prosthesis is improved.

Bone fusion system, plate system, guide, implant, kit and methods for using the bone fusion system, plate system, guide and implant are disclosed. The bone fusion system includes an alignment guide, an implant, and at least one fastener inserted through the implant. The alignment guide includes a body portion, a first lobe positioned at a first end of the body portion, a second lobe positioned at a second end of the body portion, and an extension member extending away from a first side of the body portion. The implant includes a body portion, a first arm extending away from the body portion in a first direction, a second arm extending away from the body portion in a second direction, and a third arm extending away from the body portion laterally between first and second arms. Finally, methods for using the bone fusion system, plate system, guide and implant are disclosed.

The invention relates to the technical field of joint prostheses, in particular to an ankle joint prosthesis based on a bionic bone trabecula, the ankle joint prosthesis comprises a tibia prosthesis (10), a talus prosthesis (30) and a liner (20), the tibia prosthesis (10) and the talus prosthesis (30) are both made of metal materials and are integrally formed through 3D printing, the tibia prosthesis (10) comprises a tibia body (101), and the liner (20) is arranged on the tibia body (101). The first bone contact layer (100) is integrally formed on the tibia body (101), and the first bone contact layer (100) is of a porous structure of which the pore diameter is gradually reduced from outside to inside; the talus prosthesis (30) comprises a talus body (301) and a second bone contact layer (300) integrally formed on the talus body (301), and the second bone contact layer (300) is of a porous structure with the aperture gradually reduced from outside to inside.

The ankle joint prosthesis comprises a tibia prosthesis and a talus prosthesis, the tibia prosthesis is provided with a keel, the keel is used for being implanted into a tibia and extends in the front-back direction of the tibia prosthesis, the talus prosthesis is arranged on the lower side of the tibia prosthesis, the talus prosthesis is provided with a fixing rod, and the fixing rod is arranged on the lower side of the tibia prosthesis. The fixing rod is used for being implanted into the talus and obliquely extends downwards from front to back, an included angle alpha is formed between the extending direction of the keel and the extending direction of the fixing rod, and alpha is larger than or equal to 10 degrees and smaller than or equal to 85 degrees. The ankle joint prosthesis is reasonable in structural design, the stability of the ankle joint prosthesis in the human body movement process can be enhanced, and the dislocation risk of the prosthesis is reduced.

An instrument system includes a first cut guide and an actuation instrument. The actuation instrument includes an upper portion having a handle and a first cannulation, and a lower portion releasably couplable with the upper portion. The lower portion includes a shaft, a second cannulation, wherein the second cannulation is coaxial and in fluid communication with the first cannulation, and a paddle configured to abut a resected surface of a first bone. The instrument system also includes a compression mechanism releasably couplable with the lower portion, the compression assembly couplable with the first bone and a second bone The compression assembly includes an actuator configured to bias at least one of the first bone and the second bone toward the other of the first bone and the second bone. A method for using the instrument system is also disclosed herein.

The application relates to a wrist joint prosthesis and relates to the technical field of artificial joint prostheses. The wrist joint prosthesis comprises: a carpal bone assembly for being fixed with one side of a hand-shaped bone, which comprises a carpal bone pad, a carpal bone support block embedded in one side of the carpal bone pad, a carpal bone printing column and a screw connected to the other side of the carpal bone support block, and a support block adjusting device arranged on the embedded side of the carpal bone support block, one end of the support block adjusting device being located in the carpal bone pad, and the carpal bone pad being provided with a locking piece for locking the adjusted position of the support block adjusting device; and a radius bone assembly for being fixed with a radius bone marrow cavity, which comprises a radius bone support, the radius bone support being arranged on the side of the carpal bone pad away from the carpal bone support block. The wrist joint prosthesis has the advantages of shortening the waiting time for surgery.

A surgical method surgical method includes collecting a set of patient data, identifying at least one significant point from the set of patient data, creating a surgical guide based on the at least one significant point and the patient data, and coupling the surgical guide with a calcaneum of a patient. The surgical method also includes performing at least one cut into the calcaneum using the surgical guide, wherein the at least one cut forms a recess in the calcaneum and defines a first calcaneal portion positioned substantially anteriorly from the recess and a second calcaneal portion positioned substantially posteriorly from the recess, shifting at least one of the first calcaneal portion and the second portion in a medial direction by placing an implant at least partially within the recess, and coupling the implant with the first calcaneal portion and the second calcaneal portion.

A distractor system for use in a joint between two bone surfaces of an anatomical structure includes, for example, distractor and at least one detachable tool comprising a body having a proximal portion and a distal portion, said proximal portion being releasably attachable to at least one of a first end of the distractor and / or a second end of the distractor. The distal portion of the detachable tool being operably positionable in the joint between the two bone surfaces of the anatomical structure. The detachable tools may include a detachable paddle.

An apparatus can include a metacarpal implant, a trapezium implant, and a spacer. The metacarpal implant can include a stem to be inserted into a first cavity of a metacarpal bone and having a first end and a second end, a radial lip, the radial lip extending from the second end, and an opening, the opening extending from the radial lip to the first end. The trapezium implant can include an implant head portion having a shape to match a shape of a trapezium bone and a first cavity insert, to be inserted into a second cavity of the trapezium bone extending from the bottom surface. The spacer can include a spacer head portion congruent to the implant head portion and an opening insert to be inserted in the opening and extending from the bottom surface.

Described here are self-contained surgical navigation systems which include a head-worn display device to be worn by a user during surgery. The system includes a display generator for generating a visual display on the display device, and a sensor suite having at least one tracking camera. The system further includes a support module including: a user-replaceable, modular battery that is removably insertable into a housing of the support module, and a processor unit configured to receive data from the sensor suite and calculate a position and an orientation of at least one marker. The support module is electrically coupled to the head-worn display device to provide power and data to the head-worn display device. The display device and the support module together comprise the entire sensing and computing capability of the system, without requiring external sensors, cameras, computers, or other electrical equipment.

An implant system that includes an implant having a base portion, that has a body and at least a portion of which includes a lattice structure, and an upper portion configured to releasably couple with the base portion. The implant system includes at least one first fastener configured to be received and extend at least partially through at least one bore of the base portion, and at least one second fastener configured to be received within a cavity of the base portion. Also disclosed is an implant that includes a body that has various elements configured to facilitate arthrodesis of the subtalar joint and talonavicular joint. The body includes an upper surface that is configured to interface with the tibia of a patient, and a lower surface that is configured to interface with the subtalar joint and / or calcaneus of the patient.

The disclosed subject matter relates to a system and method for preparing a surface of a bone proximate a joint, in which the preparation includes boring a plurality of arced channels / troughs in the bone surface using an arch drill assembly guided by plural guide bores along a predetermined longitudinal arc. The bored troughs create a scalloped surface on the bone to which an inverse contoured joint insert / implant having cooperating convex ridges engages. The plural guide bores are also defined by the predetermined longitudinal arc which may be circular or helical. The disclosed subject matter minimizes bone removal and allows greater access options for preparing the bone surface.

Systems, methods, and devices described herein relate an implant adapted to be placed in a bone in the metatarsophalangeal joint or a metacarpophalangeal joint. In some embodiments, the implant includes a head portion extending from a first surface to a second surface and having a plurality of layers located between the first surface and the second surface. In some embodiments, the first surface is lubricious. In some embodiments, the implant comprises a post portion extending from the second surface of the head portion to a bone facing surface.

A surgical tool includes a handle and a trial section coupled to the handle by an engagement section. The trial section includes an upper surface and a lower surface. The upper surface has a shape that corresponds to an upper surface of an implant. The trial section defines a first slot extending from the upper surface to the lower surface and inwardly from a first side. A second slot extends from the upper surface to the lower surface and inwardly from a second side.

Expandable wedge implants and related methods. The expandable implant may include a bottom endplate, a top endplate pivotably connected to the bottom endplate, an actuator with curved ramps configured to mate with angled ramps on the top endplate, and a drive screw configured to move the actuator to thereby expand the top endplate relative to the bottom endplate. The expandable implants may be configured to correct pes planus or a flatfoot deformity using Evans and / or Cotton procedures during foot surgery.

A calcaneal plate inserter tool includes a body portion, a plate retainer assembly coupled to the body portion, a sled coupled to the body portion and movable relative to the body portion, and a lock coupled to the body portion. The lock is operable between a lock position and an unlocked position. The lock impedes movement of the sled relative to the body portion when in the lock position. The sled also includes a guide portion.

The present invention provides a tantalum metal wrist joint prosthesis with a gradual porous structure and a wear-resistant layer, comprising: a distal implant, a special-shaped ball head, and a proximal implant. The distal implant comprises a distal insertion plug, a proximal platform, and a circular pin. The overall shape of the special-shaped ball head is a small half-notch of an ellipsoid. One end of the special-shaped ball head is provided with a socket that matches the circular pin, so that the distal implant and the special-shaped ball head are plugged and fixed. The other end of the special-shaped ball head is a convex ball structure. The proximal implant comprises a concave joint ball and a gradual porous structure segment. The surface of the concave joint ball is provided with a coating. The coating contacts the surface of the convex ball structure of the special-shaped ball head, so that the proximal implant and the special-shaped ball head are connected to form a compensatory wrist joint. The technical solution of the present invention solves the problems of incomplete coordination between artificial wrist joint prostheses and muscles and soft tissues, severe wear at the joint, and short service life in the prior art.

The invention provides an artificial prosthesis assembly for an ankle joint replacement operation, and belongs to the technical field of ankle joint prostheses. Comprising a talus arc plate, an arc-shaped guide rail is installed at the top of the talus arc plate, rivets are installed in the talus arc plate, a joint soft plate is connected to the top of the arc-shaped guide rail in a sliding mode, and a tibia installation plate is installed above the joint soft plate; and a rivet fixing assembly is mounted at the top of the tibia mounting plate. By arranging the elastic adjusting assembly and the sliding lubricating assembly, the contact area with bone tissue can be remarkably increased, the initial stability of the prosthesis is enhanced, the separation risk of the prosthesis is reduced, and the elastic relaxation degree of the prosthesis is adjusted and controlled, so that the modulus of the prosthesis is dynamically matched with the bone elasticity of a patient, and the bone interface stress concentration risk of the prosthesis is reduced; meanwhile, the movement resistance of the prosthesis is reduced through ball lubrication, material fatigue and loss caused by dry friction between the prostheses are avoided, and the service life of the prosthesis is prolonged.

An expandable prosthetic device used as a prosthesis during surgery. The expandable prosthetic device is configured for use in the extremities of a body such as, but not limited to, use in the expansion of the lateral or medial column of a foot. The expandable prosthetic device includes a drive block, a linkage block, a drive screw, a first endplate, a second endplate, and first and sets of linkages. Rotation of the drive screw causes movement of the linkage block relative to the drive block and / or movement of the first endplate relative to the second endplate.

Multi-axial prosthesis assemblies that include a resilient closed undulating member are used to provide vertical and rotational movement for lower limb prostheses. A shaft is located through a resilient bumper, with a first prosthetic member is fixedly attached to the shaft and engages a first surface of the undulating member, and a second prosthetic member comprises a lumen to movably receive the shaft. The prosthetic members are engaged to the resilient bumper with projections that are located in the recesses of the resilient bumper and the prosthetic members and the bumper are configured so that the projections from each member are offset from the projections of the other member, which results in an undulating appearance to the outer surface of the resilient bumper.

The present disclosure relates to a prosthesis (400) configured for implantation in a carpometacarpal joint in the wrist, the prosthesis comprising a first and a second implant part member (405a,b) configured to be screwed into a radius and metacarpal bone respectively. Each implant part member (405a,b) comprising an articulation member (420a,b) configured to be received in the bone fixation member (410a,b) in a releasable manner. The articulation members (420a,b) comprise orientation pins (423) configured to be inserted into bore sections of the bone fixation members 410a,b. When seated in the bore sections, the first portions of the articulation members (420a,b) with the orientation pins (423) are substantially centered along the central axes of the bone fixation members (410a,b), thereby forming common central axes extending through the bone fixation members (410a,b) and the articulation members (420a,b). The radius articulation member (420a) comprises a replacement articular surface configured for articulation with a replacement articular surface located on the metacarpal articulation member (420b). The radius replacement articular surface has (420a) a configuration that is asymmetric about the common central axis of the radius bone fixation (410a) and articulation members (420a). The bore sections have cross-section (419) extending perpendicularly to the central axis defining a first polygonal outline (429). The orientation pins (423) have cross-sections defining a second polygonal contour line, such that when the orientation pins (423) of the articulation members (420a,b) are seated in the bores of the bone fixation members (410a,b), rotation of the articulation members (420a,b) in relation to the bone fixation members (410a,b) is prevented.

The present invention provides a wrist joint prosthesis, comprising: a carpal prosthesis and a radial prosthesis; the carpal prosthesis having a first curved surface, the radial prosthesis having a second curved surface adapted to the shape of the first curved surface, the carpal prosthesis and the radial prosthesis being abutted against each other along a first direction via the first curved surface and the second curved surface; the carpal prosthesis being configured to be rotatable relative to the radial prosthesis about a second direction and a third direction perpendicular to the first direction, and one end of the carpal prosthesis for connection to the carpal bone being rotatable relative to one end of the radial prosthesis for connection to the radius about the first direction. With such a configuration, by configuring one end for connection to the carpal bone to be rotatable relative to one end of the radial prosthesis for connection to the radius about the first direction, the wrist joint prosthesis can realize the circumflex motion function of the radiocarpal joint, thereby improving the patient's wrist joint mobility and increasing patient satisfaction.

Provided is a prosthesis for ankle arthroplasty including a talar dome component configured to be attached to a talus bone. Also provided is a guide instrument for guiding a reamer to prepare a talus to receive the talar dome component.

The present disclosure relates to an instrumentation system for implanting an ankle prosthesis. In various embodiments, the system includes a cutting assembly including a reaming tool for preparing a cavity within an intramedullary canal of a patient. In further embodiments, the system includes a guide block configured to fasten to a tibia of the patient and couple to the cutting assembly, the tibia having a proximal end and a distal end, wherein the guide block includes one or more alignment guides for guiding the cutting assembly to the intramedullary canal on the distal end for preparing the cavity without affecting a calcaneus or the proximal end of the tibia. In some embodiments, the system includes a distractor for separating the distal tibia from a talus to facilitate preparing the cavity and inserting an ankle prosthesis into the cavity.

A stem system for a total ankle replacement implant is provided. The stem system may include an outer shell defining a cavity therein and an inner core configured to be received within the cavity of the outer shell. Each of the outer shell and the inner core may have a plurality of segments, with each adjacent pair of segments being connected by a flexible joint. The flexible joints of the outer shell and inner core may be vertically offset about the longitudinal axis of the stem system, such that when the inner core is disposed within the cavity of the outer shell, the stem system is rigidized.