242 results about "External fixation devices" patented technology

The invention relates to a novel type of an external fixation device having a carrying structure (1; 40) of interconnected elements (2, 5, 6) comprising an extendible central body (2), and clamps (5, 6) for bone screws respectively articulated on opposed ends (3, 4) of the central body (2), said central body comprising two parts (8, 9) telescoping slidable one on the other, each of said parts (8, 9) including a first portion (8a; 9a) of elongate shape formed integrally with a second end portion (8b; 9b) of substantially cylindrical shape, said first portions (8a, 9a) of the parts (8, 9) being slidably coupled to each other by means of a driving groove (7) formed longitudinally in one the first portion (8a) and a corresponding slide (7a) formed longitudinally in the other first portion (9a) and means being provided in said parts (8, 9) for stopping their sliding movement characterized in that it further comprises at least one plate (27; 41; 42; 43; 60) having predetermined contour shape and thickness, at least one recess (28; 44; 47; 51) formed on the surface of at least one of the interconnected elements (2, 5, 6) and having its contour shape matching the contour shape of said at least one plate (27; 41; 42; 43; 60), and means (30, 31; 46, 46a; 49, 50 53, 54) for releasably securing said at least one plate (27; 41; 42; 43; 60) in said at least one recess (28; 44; 47; 51).

A bone fixation apparatus and method are provided that allow a user to push bone pins into engagement with bones with more precision and accurate feel as to proper engagement and the clamping forces between the pins and bone over prior devices utilizing applicator guns and the like. Fine tuning of the clamping forces is also contemplated. Compact and highly ergonomic bone fixators are provided which allow the user to remain close to the pin application site during clamping of the pins onto the bone. Significant flexiblity is preferably incorporated by having two adjustably connected positioner bodies which can each mount a pin holder module releasably attached thereto. A fixation system with improved rigidity is also provided by way of independent clamping members for each of a pair of rod mounts on each pin positioner. The independent clamp members keeps their size to a minimum while allowing the angular separation of connecting rods secured in the rod mounts and spanning and interconnecting two fixators to be optimized, e.g. approximately eighty degree angular spacing, from a system stability standpoint.

An external foot / ankle fixation device has a one-piece frame component and a positionable cross bar that allows the attachment of generally anterior / posterior directed fixation wires or rods emanating from the foot / ankle of a patient. The external fixation device provides a stable fixation platform both in-plane and out-of-plane of the object of fixation (e.g. foot or ankle). The fixation device through the cross bar also provides various degrees of angulation of anterior / posterior directed wires in two planes. Posterior angulation components may be provided to the posterior portion of the frame component that provide additional fixation wire / rod angulation variations. Compression rails may also be provided. An optional elevator component may be attached to the bottom of the frame component that does not obstruct access to the soft tissues on the bottom of the foot. The elevator component protects the bottom of the foot from contaminated surfaces.

Apparatuses and methods for externally fixing and precisely adjusting fractures, such as fractures near the ankle, are disclosed. In one embodiment, an external fixation apparatus includes a first member attachable to a first bone segment through pins, a second member coupled to the first member through a lockable ball joint, wherein first and second ends of the second member may be translated transversely relative to a longitudinal axis of the second member, and a pin clamp coupled to and rotatable about the second member through a lockable joint and attachable to a second bone segment. The pin clamp and the second member may be releasably coupled.

An external fixing device for the treatment of bone fractures includes a first member, a second member, a central body arranged between the first member and the second member, a first ball joint for the articulated connection of the first member with the central body, a second ball joint for the articulated connection of the second member with the central body, locking means operatively associated to the first ball joint and with the second ball joint, respectively, the locking means being suitable for allowing / preventing the articulation of the first member and second member with respect to the central body, wherein the first member includes a first clamp, the second member includes a second clamp and the central body includes a third clamp for connection of the external fixing device to respective fractured bone portions to be treated.

The invention discloses a single-side double-rail combined skeletal external fixation device, which consists of a flat-rotation bone needle clip, an L-shaped bone needle clip, a main guide rail, guide rail nuts, a movable bone needle clip, a perpendicular foot rectification bracket, a metatarsal bone needle regulation mechanism, a calcaneus bone needle regulation mechanism, a regulation cushion, a spindle bolt, an auxiliary support mechanism and a bone needle, wherein the flat-rotation bone needle clip ( or the L-shaped bone needle clip) is connected with the main guide rail via the spindle bolt; the guide rail nuts are respectively screwed onto two sides of the movable bone needle clip on the main guide rail; the perpendicular foot rectification bracket is clamped on the proper position of the main guide rail; the metatarsal bone needle regulation mechanism is respectively clamped on the corresponding positions of a small guide rail and the main guide rail; the calcaneus bone needle regulation mechanism is also clamped on the corresponding positions of the small guide rail and the main guide rail; the auxiliary support mechanism is clamped and fixedly arranged on the main guide rail; the flat-rotation bone needle clip, the L-shaped bone needle clip and the movable bone needle clip are used for clamping the bone needle to form the main body of the single-side double-rail combined skeletal external fixation device. The single-side double-rail combined skeletal external fixation device can be used for skeletal external fixation, bone lengthening, bone transportation, perpendicular foot rectification and O, X and K-leg orthopaedics.

An external fixing device for the treatment of bone fractures includes a first member, a second member, a central body arranged between the first member and the second member, a first ball joint for the articulated connection of the first member with the central body, a second ball joint for the articulated connection of the second member with the central body, locking means operatively associated to the first ball joint and with the second ball joint, respectively, the locking means being suitable for allowing / preventing the articulation of the first member and second member with respect to the central body, wherein the first member includes a first clamp, the second member includes a second clamp and the central body includes a third clamp for connection of the external fixing device to respective fractured bone portions to be treated.

Techniques and reconstruction systems for fixation of bone to bone, or soft tissue to bone, that allow a double-bundle type construct with only three tunnels, a single graft and individual tensioning in each of the three tunnels. Alternative double-bundle ACL / PCL fixation techniques are provided that employ a double-bundle type construct with only a single graft and three tunnels / sockets. The double-bundle ACL and PCL techniques and constructs allow individual tensioning of each of the bundles (e.g., tensioning of each of the anteromedial (AM) and posterolateral (PL) bundles of the ACL) and eliminate the need for additional fixation devices (for example, interference screws) to secure the bundles within the bone tunnels / sockets.

An external fixation device for holding bone fragments in place includes a housing having a number of rotationally adjustable pin holders, each of which is held by a clamping member that simultaneously clamps the pin holder within an internal mounting surface of the housing and a bone pin within the pin holder. A first embodiment includes a number of internal mounting surfaces, each of which can include a single pin holder. A second embodiment includes one or two internal mounting surfaces, each of which holds a row of pin holders that is clamped in place by a single clamping member. Other embodiments include such pin holders arranged with elements including an array of pin holding positions for fixing fragments at a fractured end of a bone, such as a fractured distal radius,

Frame assembly for external fixation device and associated method. The frame assembly includes a first arc segment and a second arc segment. The first arc segment is for interconnection to a first bone portion. The second arc segment is for interconnection to a second bone portion. The first arc segment is coupled to the second arc segment for controlled relative rotation.

Described is a new bone healing method and class of bone fixation implants that change shape once implanted so as to minimize non-healing and speed the bone healing process. The bone fixation method involves shape changing implants that continuously hold the bones in apposition so that a gap does not form. Gaps in time allow non-bony tissue to infiltrate and stop healing. Furthermore, the implants actively compress bone to increase bone mass and strength. Bone cell pressure due to compression and electrical current flow due to bone deformation act to stimulate healing. The new implant designs also provide a scaffolding to conduct bone through the implant and across the healing bone interface. The methods and designs are applicable to but not limited to use for bone screws, plates, staples, rods, cylinders and external fixation devices.

The invention relates to a novel type of an external fixation device having a carrying structure of interconnected elements comprising an extendible central body, and clamps for bone screws respectively articulated on opposed ends of the central body, said central body comprising two parts telescoping slidable one on the other, each of said parts including a first portion of elongate shape formed integrally with a second end portion of substantially cylindrical shape, said first portions of the parts being slidably coupled to each other by means of a driving groove formed longitudinally in one the first portion and a corresponding slide formed longitudinally in the other first portion and means being provided in said parts for stopping their sliding movement characterized in that it further comprises at least one plate having predetermined contour shape and thickness, at least one recess formed on the surface of at least one of the interconnected elements and having its contour shape matching the contour shape of said at least one plate, and means for releasably securing said at least one plate in said at least one recess.

The invention discloses a remote laser radar calibration system. The calibration is carried out between a laser radar and a calibration device, and the calibration device is provided with a support, acalibration panel, and an adjustment device. The calibration panel is disposed on the support, and the adjustment device is used for adjusting the height and angle of the calibration panel. The adjustment device comprises a support which is provided with an upper part and a lower part, wherein the upper part is provided with a plurality of adjustment holes at different heights, and the lower partand a folding device are fixed through a connecting device. The adjustment device also comprises an inner rotating control device and an outer rotating control device, wherein the outer rotating control device is disposed between the inner rotating control device and the support, and the inner and outer rotating control devices have the same center. The scale position is read through the mutual rotation of the inner and outer rotating control devices, and the angle is adjusted. In addition, a fixed device can pass through the calibration panel, is disposed on the adjustment holes of the support in a bulged manner, and is fixed on the adjustment holes through a spiral fixing part.

The present invention relates to a bendable bone plate for external fixation, comprising a main body made of flexible materials, wherein the end of the main body has a larger surface area. There are several perforations running the length of the bone plate body and more located on the larger proximal end. The characteristics of the present invention, a bendable bone plate for external fixation, deal with remote end fracture, proximal end fracture, central fracture or comminuted fracture of an upper limb long bone. Furthermore, the bendable bone plate for external fixation can be manipulated for averting the nerve plexus and traumatic wounds, allowing for external fixation surgery.

An assembly for use with a bone fastener includes a fixation device and a bone fastener retainer device. The fixation device has an opening configured to receive a bone fastener in an installed position in which an outer end portion of the bone fastener is located within the opening. The retainer device is receivable over the fixation device in a closed position extending over the location taken by the outer end portion of the bone fastener within the opening. Additionally, the fixation device and the retainer device together have first and second locking structures. The locking structures are configured to engage each other in an undeflected condition when the retainer device is in a partially closed position, and to snap into interlocked engagement with each other under an applied force that moves the retainer device from the partially closed position to the closed position.

An external fixation device having a frame comprising at least one rod which takes up the mechanical loads. Frame and bone are connected via connecting means known per se, in particular bone-retaining pins. These connecting means in turn are connected to the frame via clamping jaws. These clamping jaws permit detachable fixing and arbitrary arrangement and grouping on the frame. A module which can be mounted on the frame is provided. By means of the module, a movement of two bone fragments relative to one another can be effected. It has at least two components. The first of the at least two components can be connected to the frame. The second of the two components can be connected to at least one clamping jaw of a connecting means which is connected to a bone fragment.

The fixator is an apparatus for repairing fractures of the distal radius and wrist. Distal, pivot, distraction, and radial members provide an anatomically contoured, radiolucent apparatus that permits the wrist to move through a substantially normal range of motion. A means for distraction of the bones by the fixator is also provided. The fixator may be affixed to the lower arm and hand by spaced-apart elongate distal mounting pins with lower ends adapted or mounting in the metacarpal bone and by spaced-apart elongate radial mounting pins with lower ends adapted for mounting in the radius.

An external fixation device for holding bone fragments in place includes a housing having a number of rotationally adjustable pin holders, each of which is held by a clamping member that simultaneously clamps the pin holder within an internal mounting surface of the housing and a bone pin within the pin holder. For example, the device includes a number of internal mounting surfaces, each of which can include a single pin holder. A drill guide fitting into the internal mounting surfaces is used to protect soft tissue from bone pins and they are rotated during installation.

The invention discloses a fracture rehabilitation evaluation method based on a six-axis parallel external bone fixation device, which mainly comprises the following steps: adding a sensor to each branch chain of a prior six-axis parallel external bone fixation device, and restoring and fixing the fracture using a modified device; using a marker, wherein the space positions and postures of the fracture bone blocks and external bone fixation device are identified through the medical CT scanning; dividing the rehabilitation process into a first time period and a second period according to a clinical general rehabilitation phase dividing method, wherein, when a patient is in the first time period, the mechanical condition of the fracture part is measured and analyzed, and the external bone fixation device is finely adjusted and the patient is guided to carry out rehabilitation training; when the patient is in the second time period, the quantitative index of the fracture recovery is calculated, and the external bone fixation device is removed at appropriate timing. The method is suitable for all kinds of commercially available six-axis parallel external bone fixation devices, and haseconomy and convenience; according to the method, the quantitative evaluation of fracture rehabilitation is carried out by using an energy analysis method, and the reliability is good.

The invention provides a bone repair film and a preparation method thereof. The bone repair film is characterized by comprising an active layer, a barrier layer and a fixed layer. The barrier layer islocated between the active layer and the fixed layer, and the active layer and the fixed layer are electrospun fiber films. The barrier layer is a cast film, the electrospun fibers in the fixed layerare aligned in fiber orientation, and the active layer contains an active ingredient. The three-layer film structure is compounded by the electrospinning technology combined with the solution castingtechnology with the aid of vacuum filtration. The bone repair film has excellent performances for simultaneously regenerating natural bone tissues and periosteal tissues. The fixed layer of the bonerepair film has the special function of fixing the whole film to avoid the use of an external fixation device and simplify the surgical procedure. At the same time, the microstructure of the fixed layer orientation is favorable for the orientation growth of the soft tissues and has the function of regenerating the natural periosteal orientation fiber layer.

An external fixation device for holding bone fragments in place includes a housing having a number of rotationally adjustable pin holders, each of which is held by a clamping member that simultaneously clamps the pin holder within an internal mounting surface of the housing and a bone pin within the pin holder. A first embodiment includes a number of internal mounting surfaces, each of which can include a single pin holder. A second embodiment includes one or two internal mounting surfaces, each of which holds a row of pin holders that is clamped in place by a single clamping member. Other embodiments include such pin holders arranged with elements including an array of pin holding positions for fixing fragments at a fractured end of a bone, such as a fractured distal radius.