770results about "Femoral heads" patented technology

A trial neck for hip surgery and a method of attaching a trial neck to a femoral canal implement. The trial neck includes a body portion including a bore for receiving a proximal end of a femoral canal implement. The trial neck also includes an elongate neck extending from the body portion. The trial neck further includes a locking mechanism comprising a lever. The lever has a first end. The lever also has a second end. The lever further has an engagement surface. The second end of the lever is actuable to urge the engagement surface against the proximal end of the femoral canal implement to secure the proximal end of the femoral canal implement within the bore.

An orthopaedic joint prosthesis assembly includes a head part of an orthopaedic joint prosthesis component and an alignment guide. The head part has a spherical bearing surface for articulation with a corresponding joint surface, and an assembly surface having a first bore formed in it for receiving a spigot on another part of the orthopaedic joint prosthesis. The bore has a first axis that extends perpendicular to the assembly surface. The alignment guide has an axial portion defining a second axis and an arm extending from the axial portion. The arm includes a distal portion which is configured to engage the assembly surface, with the axial portion being arranged to engage the bearing surface of the head part when the head part is mounted within the guide such that an impaction force applied along the second axis is directed along the first axis.

The invention discloses a calculation method and system for the optimal placement orientation of an acetabular cup in a total hip joint operation, and belongs to the field of surgical instruments. The calculation method comprises the steps that CT data of a patient is obtained, a three-dimensional model is constructed, point locations in the three-dimensional model are recognized, a three-dimensional coordinate system is established according to a pelvis mark point and a femoral head rotation center point, and the optimal placement orientation of the acetabular cup is calculated; and determining the initial position of femoral motion according to the femoral head rotation center point and the femoral mark point. And drawing a space femoral neck movement range according to the femoral form and a preset hip joint movement range. The centroid of the curved surface is calculated based on the space femoral neck movement range, the rotation center point of the femoral head serves as the starting point and extends towards the centroid to form a ray, and the orientation of the ray in three-dimensional coordinates serves as the optimal placement orientation of the acetabular cup. According to the method, the individualized thighbone shape and the joint movement range of a patient are considered, the optimal acetabulum orientation is given according to different prostheses, and a definite operation target and guidance are given to an operator, so that the dislocation risk after hip replacement is reduced, and the acetabular cup placement reliability is greatly improved.

Hip arthroplasty trial systems and associated medical devices, methods, and kits are described that can be utilized in situ to complete a femoral head trial. An example embodiment of a hip arthroplasty trial system includes a medical device and a femoral stem. The medical device has a head member, a spacer, a shaft, and a locking member. The spacer is disposed within the head member and is moveable from a first position to a second position. The shaft is disposed within the head member and contacts the femoral stem. The shaft is moveable from a first position to a second position. Movement of the shaft from the first position to the second position moves the spacer from its first position to its second position. The locking member is disposed within the head member and releasably attaches the shaft to the head member.

An implant includes a body including a substrate and a bone interfacing lattice disposed on the substrate. The bone interfacing lattice includes at least two layers of elongate curved structural members. In addition, the at least two layers of elongate curved structural members include a first layer adjacent the substrate and a second layer adjacent the first layer. Also, the first layer has a first compressibility and the second layer has a second compressibility, wherein the second compressibility is greater than the first compressibility. Further, an interface between the first layer and the second layer is a transition region having a thickness within which the elongate curved structural members of the first layer are intermingled with the elongate curved structural members of the second layer such that a boundary of the first layer overlaps with a boundary of the second layer.

A bone insert includes a cap having a convex top surface, an elongated stem, and a barrier between the cap and the stem. The stem of the bone insert is inserted into a hole formed in a host bone until the barrier is pressed against the exposed bone. The bone implant can be placed against a small focus contact point on the cap. Liquid cement can be injected into a space volume between the host bone and a bone implant. The cap can be made of a material and / or have surface features that create a strong bond with the cement when the liquid cement cures. The stem can be made of a material and / or have bone ingrowth surface features that create a strong bond with the bone.

Disclosed is an actuator for hip replacement, which is configured to prepare a space for installing a prosthesis on a bone and implanting the prosthesis. The actuator includes a first actuator and a second actuator. The first actuator is configured to connect a cutting tool to process an acetabulum and / or a medullary cavity, and the first actuator has a first connector and a second connector. The second actuator is configured to connect to the second connector of the first actuator during an operation of implantation of the prosthesis is performed, and connect the prosthesis and receive impact produced during installing the prosthesis. The actuator for the hip replacement is configured to be installed to a robotic arm via the first connector. During the hip joint surgery, when the acetabulum and the medullary cavity are prepared, the robotic arm is connected to the first actuator. When it is necessary to install the prosthesis, the second actuator is connected to the first actuator. By the above configuration, the operation of actuator replacement is capable to be reduced, thereby facilitating completing the hip replacement surgery.

A surgical component mounting system is provided that can include a surgical instrument (5) and an intermediate component (20). The surgical instrument can have a proximal end and a distal end (7) that can provide a first part (9) of a mounting. The intermediate component can have a proximal end that can provide a second part (22) of the mounting and a distal end (35) that can be provided with a first part (36, 38a, 38b) of a second mounting such that the first part of the mounting and the second part of the mounting are detachable.

An apparatus, system, and method may be used to replace a natural or artificial articular surface of a joint, and to repair a bone that is associated with the joint. In some embodiments, the apparatus, system, and method may include a joint replacement prosthesis with a prosthetic articular surface, a support structure securable to the bone, and a first attachment interface. The system may also include a bone plate with a bone engagement surface securable to the bone on either side of a fracture formed in the bone, or a damaged area of the bone. The bone plate may include a second attachment interface that is attachable to the first attachment interface of the joint replacement prosthesis in order to couple the bone plate to the joint replacement prosthesis.

The invention relates to the technical field of medical instruments, and discloses an angle-adjustable artificial hip joint prosthesis structure which comprises a thighbone connecting assembly, an acetabulum connecting assembly and a movable part movably connected between the thighbone connecting assembly and the acetabulum connecting assembly. The thighbone connecting assembly comprises a first connecting unit fixedly connected with the movable part, a thighbone stem detachably connected to the lower end of the first connecting unit, and a connecting screw fixedly connected to the upper end of the thighbone stem and in threaded connection with the first connecting unit. The acetabulum connecting assembly comprises a second connecting unit fixedly connected with the movable part and an acetabulum fixedly connected to the second connecting unit. Stable rotating connection is achieved through the double-shaft moving part, and a traditional easily-abraded spherical surface structure is replaced; the locking assembly is matched to realize personalized angle adjustment and locking; the femoral stem can be detached and replaced, and adaptability is improved; the surface composite coating promotes osseointegration and improves biocompatibility, the overall structure stability is high, adaptability is high, and postoperative recovery is fast.

The invention relates to the technical field of medical instrument artificial prostheses, in particular to a femoral stem prosthesis and a femoral stem prosthesis system. A femoral stem prosthesis comprises a femoral neck, a stem body connected with the femoral neck and a stem tail connected with the stem body in the direction away from the femoral neck, side grooves are formed in the peripheral faces, located on the two sides of the femoral neck, of the stem body, side wings are connected with the side grooves in a sliding mode, injection holes are formed in the ends of the side wings, and outflow holes are formed in the peripheral faces of the side wings. And the injection hole is communicated with the outflow hole. Triple fixation is achieved through the side wings, the back wings and the holes in the side wings; the handle body and the handle tail are fixed and selected in a split manner, so that the adaptability of the prosthesis for the osteoporosis patient is improved; the same operation file can be adopted for various handle types through one handle tail, and the operation efficiency is improved.

A system for repairing a first fracture and a second fracture of a bone associated with a joint may include a fastener configured to span the first fracture. The fastener may include a first end, configured to engage the bone on a first side of the first fracture, and a second end, configured to engage the bone on a second side of the first fracture. The system may also include an intramedullary nail. The intramedullary nail may include a nail receiver configured to slidably receive the fastener. The system may further include a bone plate. The bone plate may include a plate aperture, configured to receive the fastener, and a bone engagement surface, securable to the bone on either side of the second fracture. With the fastener slidably received in the nail receiver, a longitudinal axis of the fastener may pass through the plate aperture.

A trial neck piece for a joint endoprosthesis is designed for temporary arrangement on a separate shaft body (60) that is insertable into a tubular bone (9). It comprises a fastening region (12) which can be plugged temporarily onto a head part (61) of the shaft body (60) by means of a plug connection (l l), and a neck region (IO) for receiving a joint element (19) of the joint endoprosthesis. The trial neck piece (I) is designed as a separate, plug-on attachment piece which, with its fastening region (12), can be plugged with form-fit engagement onto the head part (61) and locked. A latching device (2) is provided which comprises a plurality of latching stages for different height stages of the trial neck piece (I). The invention thus makes available an easily attachable trial neck piece which can be arranged in a defined manner in different height positions in order, on the one hand, to obtain a secure and defined arrangement and, on the other hand, to permit the setting of different heights. The invention further relates to an arrangement with a trial neck piece and with an excavating tool, in particular a reamer, and to an instrument set comprising a trial neck piece and an insertion instrument.

A proximal femur replacement implant assembly (500, 1000) arranged and configured to replace a head portion of a patient's proximal femur is disclosed. In some examples, the proximal femur replacement implant assembly includes a proximal femur replacement implant (505, 1005) arranged and configured to be coupled to, or inserted into an intramedullary canal of, a remaining portion of a patient's femur. The proximal femur replacement implant being arranged and configured to engage a bone plate (510, 1010, 1050) to, for example, minimize micromotion of the patient's greater trochanter to promote porous in-growth and to constrain movement of the greater trochanter.

An orthopaedic prosthesis for use in a hip replacement surgery includes an implantable stem component. The implantable stem component includes a core and a shell extending over the core. The shell includes a polymeric material and is configured to receive a femoral head component. Metal foam may extend over a portion of the shell.

Computer implemented methods, systems, and computer products employing program code or algorithms for use in customized patient specific hip implants or femoral stems or sleeves having an outer surface that corresponds more closely to the inner surface of the cortical bone of a patient's femur compared to conventional hip implant or femoral stems or sleeves based on population-based design.

Orthopedic implants and related surgical methods for using same. The implants have suture bore geometries that facilitate performance of the surgical methods, thereby providing for improved optimal biomechanical force application in various anatomies. The implants include suture bores that have an angled / diagonal, or skewed, orientation within the anatomical planes (lateral / sagittal and frontal / coronal). The suture bores have the skewed orientation so that the adjacent soft tissues (i.e., tendons or ligaments) can be advanced via the suture therethrough in superior-inferior and inferior-superior directions. Openings, or holes, at the ends of the suture bores are configured to approximate the adjacent associated soft tissue to the implant.

The present application is directed a Joint Revision Surgery Apparatus which includes a surgical knife blade guide block which has a plurality of rearward blade guide slots, a central cavity and a large forward slot having an adjustable knife blade guide pressure plate. The surgical knife blade guide block central cavity houses a stem trunnion securing member and is positioned over the trunnion end of the existing prosthesis to be removed and secured to the prothesis. The guide blade block is secured to the trunnion of the prosthesis to be extracted using a stem trunnion securing member housed within the guide block. Straight, curved and compound curved knife blades are guided by the blade guide slots to cut the prothesis free. The Joint Revision Surgery Apparatus facilitates rapid, efficient and complete removal of an existing prosthesis during joint revision surgery, and significantly increases positive medical outcomes for joint revision procedures.

A thin-blade chisel system, for separating an outer surface of an orthopedic implant and an inner surface of a bone from each other, includes a thin-blade chisel having a blade tip at a distal end portion in a longitudinal direction, and a hammering direction changing tool engaged with the thin-blade chisel to apply a force in an advancing direction of the blade tip. The thin-blade chisel includes a hammering blow-receiving part, preferably a through hole penetrating in a thickness direction, at a predetermined position on a proximal side closer to the surgeon. The hammering direction changing tool includes a hammering portion to be hammered, located at a proximal end portion, and a recess formed at a distal end portion, to be engaged with an inner circumferential surface of the through hole.

A system for surgical registration. The system may include at least one computing device in communication with a surgical navigation system and the surgical device. The at least one computing device: a) receiving external bone registration data corresponding to locations on the exterior surface of the femur; b) calculating a first registration transform based on the external bone registration data; c) transforming a first bone removal plan of a surgical plan to the operative coordinate system based on the first registration transform; d) receiving internal bone canal registration data corresponding to at least one of location or orientation data from the inner canal of the femur; e) calculating a second registration transform based on both of the external and internal bone canal bone registration data; and f) transforming a second bone removal plan of the surgical plan to the operative coordinate system based on the second registration transform.

A device is used to treat periprosthetic fractures, such as a fracture below the stem of a total hip replacement (THR). The device includes a clamp that is fixed to the exposed stem of the THR and a coupling, such as a morse taper, extending distally away from the stem. A post is inserted into the canal of the distal femur below the fracture. The post has a coupling extending proximally away from the distal femur. The couplings on the clamp and post are joined to create a stable connection between the patient's hip and distal femur. Instead of connecting the clamp with the post directly, one or more adapters may be provided to adjust the length and angulation of the treated limb. The device may also connect a THR stem with a Total Knee Arthroplasty (TKA) that includes a stem.

The present disclosure provides alert implants that comprise a medical device and an implantable reporting processor (IRP), where one example of such a medical device includes a component for a total knee arthroplasty (TKA) such as a tibial extension, a femoral component for hip replacements, a breast implant, a distal rod for arm or leg breakage repair, a scoliosis rod, a dynamic hip screw, a spinal interbody spacer, and tooling and methods that may be used to form the alert implant, and uses of such alert implants in the health maintenance of patients who receive the implant.

The present application is directed a Joint Revision Surgery Apparatus which includes a surgical knife blade guide block which has a plurality of rearward blade guide slots, a central cavity and a plurality of guide slots having a two-way adjustable L-shaped guide plate. The surgical knife blade guide block central cavity houses a stem trunnion securing member and is positioned over the trunnion end of the existing prosthesis to be removed and secured to the prothesis. The guide blade block is secured to the trunnion of the prosthesis to be extracted using a stem trunnion securing member housed within the guide block. Straight, curved and compound curved knife blades are guided by the blade guide slots to cut the prothesis free. The Joint Revision Surgery Apparatus facilitates rapid, efficient and complete removal of an existing prosthesis during joint revision surgery, and significantly increases positive medical outcomes for joint revision procedures.

An orthopaedic surgical instrument includes an assembly collar having a cavity extending between a superior opening and an inferior opening. The cavity is sized to receive a tapered trunnion of an implanted femoral stem. A bore extends between an inferior end and a superior end of the assembly collar and is configured to align with an implant bore formed in the implanted femoral stem. The bore and the implant bore are configured to receive a fastener to secure the assembly collar to the implanted femoral stem. A method of utilizing the orthopaedic surgical instrument is also contemplated.

The invention provides a hip joint prosthesis. The hip joint prosthesis comprises a femoral stem body; the driving part is arranged on the femoral stem main body; the transmission part is movably arranged in the femoral stem main body, and the driving part drives the transmission part to move; the plug connector is telescopically arranged on the femoral stem main body to have a plug-in position and a first storage position, and the transmission part moves to drive the plug connector; when the plug connector is located at the plug-in position, the plug connector extends out of the femoral stem main body; when the plug connector is located at the first storage position, the plug connector retracts into the femoral stem main body; the force measuring piece comprises a dynamometer and a first elastic piece connected to the dynamometer, the dynamometer is movably arranged in the femoral stem body, and the dynamometer drives the first elastic piece to stretch out and draw back on the femoral stem body so that the first elastic piece can have a force measuring position and a second containing position. According to the technical scheme, the problem that the hip joint prosthesis in the related technology cannot give consideration to the stability after implantation and the convenience of later maintenance at the same time is solved.

Improved hip arthroplasty trial devices and hip arthroplasty trial systems are described. A hip arthroplasty trial device has a head member having a central axis and defining an inner chamber, a head member opening providing access to the inner chamber, and a cavity extending inward from the outer surface of the head member. A rotatable member is disposed in the inner chamber and along an axis between the central axis and one side of the head member. The cavity extends along an axis between the central axis and another, opposite side of the head member. A spacer is disposed within the head member opening and is moveable between a spacer first position and a spacer second position. Rotational movement of the rotatable member moves the spacer from the spacer first position to the spacer second position.

The invention provides a hip joint prosthesis which comprises an acetabular cup provided with a containing cavity, the acetabular cup is provided with a first magnetic part and a limiting ring groove, and the limiting ring groove is communicated with the containing cavity; the ball head is rotatably arranged in the accommodating cavity; the clamping ring is arranged outside the equator part of the ball head in a sleeving mode, the ball head can swing relative to the clamping ring, a second magnetic piece is arranged on the clamping ring, the second magnetic piece is matched with the first magnetic piece in a magnetic attraction mode so that the ball head can be connected with the acetabular cup, at least part of the clamping ring swings in the limiting ring groove along with the ball head, and the clamping ring can be matched with the side wall of the limiting ring groove in a limiting mode; and the femoral stem is fixedly connected with the ball head. According to the technical scheme, the problem that in the prior art, the movement range of a hip joint prosthesis is insufficient, and the joint flexibility is affected is effectively solved.

An adjustable implant trial (1) includes a trunnion section (100) and a broach (150), the broach being insertable within the bone of a patient during a trialing step. The implant trunnion has a load cell (200) that can measure forces acting on the head (120) of the implant trunnion (e.g., through a trial head attached thereto) during a distraction test. The adjustable implant trial can have a mechanism that alters the neck length of the adjustable implant trial by changing the distance between the implant trunnion and the broach. The adjustable implant trial may also have a mechanism to change the neck offset of the adjustable implant trial.

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.