Abstract: Disclosed herein are systems and methods for manipulating the orientation of a plurality of bone fragments with respect to one another. A bone transport frame including first and second rings, a plurality of elongate struts, and a plurality of ring transport assemblies for orienting a first bone segment with respect to a second bone segment is disclosed. A third ring may be included in the bone transport frame for orienting a third bone segment with respect to the first and second bone segments. Manipulation of an adjustable member of the bone transport frame can transport a ring in either a proximal or distal direction with respect to other rings of the frame. Manipulation of another adjustable member of the bone transport frame can translate a central axis of one of the rings either toward or away from the central axes of the plurality of elongate struts.

Abstract: Disclosed herein are external fixation frames for correcting bone deformities. The external fixation frames include a top fixation ring and a bottom fixation ring coupled to one another by at least two struts. A half ring is coupled to bottom fixation ring. The bottom fixation ring is u-shaped. One or more rocker members may be coupled to the bottom fixation ring. The half ring may be hingedly coupled to the bottom fixation ring such that it can rotate with respect to the bottom fixation ring from a first position to a second position.

Abstract: A spinal implant includes a link having a first surface and a second surface connectable with a spinal construct. The spinal construct is attachable with one or more vertebral levels. A plurality of electrodes includes at least one electrode disposed with the first surface and at least one electrode disposed with the second surface such that the electrodes conduct an electric current to stimulate tissue growth adjacent the spinal construct. Systems, surgical instruments and methods are disclosed.

Abstract: A tool for implementing a correction plan in an external fixation frame having a plurality of adjustment elements or screws, for example, generally includes a driver, a motor, a controller, and a processor. The driver is adapted to engage and rotate each of the screws. The motor is coupled the driver and adapted to rotate the driver. The controller is connected to the motor and configured to control operation of the motor. The a processor adapted configured to: receive correction plan data; receive identification data including information for identifying at least one of the plurality of screws; determine movement of at least one of the plurality of the screws based on the correction plan data and the identification data; and send signals indicative of the determined movement to the controller in order to rotate at least one of the plurality of screws according to a predetermined correction plan.

Abstract: An external fixation system for the correction of long bone deformities includes an elongate beam element having an engagement feature along a longitudinal edge of the elongate beam element, a connector element secured to the elongate beam and structurally configured to support a first bone anchor extending from the external fixation system, and a movable carriage engaged with the engagement feature along the longitudinal edge of the elongate beam element and selectively movable along the engagement feature of the elongate beam element. The movable carriage is selectively lockable into a position along the elongate beam element. The movable carriage is structurally configured to support a second bone anchor extending from the external fixation system.

Abstract: Disclosed herein are external fixation frames for correcting bone deformities. The external fixation frames include a top fixation ring and a bottom fixation ring coupled to one another by at least two struts. A half ring is coupled to bottom fixation ring. The bottom fixation ring is u-shaped. One or more rocker members may be coupled to the bottom fixation ring. The half ring may be hingedly coupled to the bottom fixation ring such that it can rotate with respect to the bottom fixation ring from a first position to a second position.

Abstract: An external bone fixation system may include a first semi-circular external fixation member, a second semi-circular external fixation member, four ball collet assemblies attached to the second external fixation member, and four shafts. Each shaft may include a first end attached to the first external fixation member and a second end with a stop member, and each of the four shafts extends slidably through an opening in a ball of one of the four ball collet assemblies. The stop member of each second end prevents each second end from passing through the opening in its respective ball. Each shaft also includes a hinge located closer to the first end than to the second end.

Abstract: The present invention in general provides methods for reducing RF-induced heating in an external fixation device including at least two bars, at least two clamps and at least two pins; and external fixation devices with significantly lower RF heating at the pins' tips when compared to other external fixation devices.

Abstract: An apparatus includes a substrate and a plurality of biological material stimulators positioned on the substrate. Each biological material stimulator forms a fluctuating magnetic field capable of inducing a current in biological material.

Abstract: Rod link reducer assemblies, systems, and methods thereof. The rod link reducer assembly provides a manipulator rod having a first end, a second end, and an elongate body extending along a body axis between the first end and the second end. A post extends outwardly from the rod. A rod manipulating joint comprise an elongate joint rod extending along a joint rod axis, a first coupling clamp disposed along the joint rod, the first coupling clamp releasably connectable to the post, and a second coupling clamp disposed along the joint rod adjacent to and rotatable about the joint rod relative to the first coupling clamp. The second coupling clamp is releasably connectable to a shaft. A biasing member is adapted to bias the second clamp against the first clamp.

Abstract: Disclosed is an adjustable and partially removable calcaneal restraint system and treatment method in the context of a first phase of surgery wherein a transverse calcaneal pin is inserted through the calcaneus and the calcaneal restraint system is then installed pending the second surgery. An aspect of the calcaneal restraint system also provides a partially removable framework to allow better or unimpeded access to the desired site for the second surgery stage of the treatment.

Abstract: A device (10) for locking unicortical pins, comprising: a pin-locking arm (101) provided with two seats (101a, 101b) suitable for locking a corresponding number of unicortical pins (100); and a connection base (102), intended to couple with a connecting body (11) of an anchoring group (20) for an external fixator (1), locking means (103) configured to act simultaneously on the seats (101a, 101b), locking in position two unicortical pins (100) inserted therein, wherein said locking means (103) comprise deformable spheres (103a, 103b) which are passed through by an insertion channel (1031) for the unicortical pins (100), and a pressure plate (103c) acting on the seats (101a, 101b) for compress both said deformable spheres (103a, 103b) locking in position the unicortical pins (100) inserted in the respective insertion channels (1031).

Abstract: A detection device, such as a camera-enabled smart phone, may be used to take one or more pictures of an external fixation frame attached to a patient. The pictures may be transmitted to a computer system accessible by the patient's physician. The computer system may uniquely identify each strut of the external fixation frame and determine the length of each strut. The computer system may compare the determined length of each strut to a planned length of the struts for a particular time interval as outlined in a correction plan. If the struts are the correct length for the particular time interval, the fact may be indicated to the physician and transmitted to the patient. If the struts are not the correct length, the computer system may update the correction plan to account for the discrepancy plan, with the updated correction plan transmitted to the patient.

Abstract: An external fixation frame for correcting a bone deformity includes a first fixation ring and a second fixation ring. A posterior adjustable length strut couples a posterior portion of the first fixation ring to a posterior portion of the second fixation ring and has universal joint. Medial and lateral adjustable length struts couple medial and lateral portions of the first fixation ring to medial and lateral portions of the second fixation ring respectively, each of the medial and lateral adjustable length struts including a constrained hinge joint. The fixation frame also includes a half ring coupled to the second fixation ring.

Abstract: The invention relates to an external fixator device and the method of its use in treating bone fractures and in orthopedic interventions, such as corrective osteotomies.

Abstract: A Kirschner wire fixation structure, including: at least two joint elements, each having a plurality of through-hole passages extending in different directions; and at least one connection rod; wherein the plurality of through-hole passages of the at least two joint elements are for at least two Kirschner wires and the at least one connection rod to fit through respectively, the at least two Kirschner wires are for inserting into at least one bone, and the at least one connection rod is for connecting with the at least two joint elements to form a fixation structure outside the at least one bone to stabilize and hold the at least two Kirschner wires in place.

Abstract: A fracture reduction device for reducing a fractured bone having a proximal fragment and a distal fragment may include: a proximal attachment member that may be configured to be coaxially attached and fixed into the proximal fragment of the bone; a distal attachment member that may be configured to be laterally attached and fixed to the distal fragment of the bone; and a distracting mechanism that may engage with the proximal attachment member and be coupled with the distal attachment member. The distracting mechanism may be configured to manipulate the proximal fragment and the distal fragment to restore their alignment and orientation.

Abstract: An adjustable length strut includes two joints, a threaded rod extending between the joints, and a tube adapted to receive the threaded rod. An actuation mechanism with gear teeth extending radially outward of the strut axis is rotatably fixed to the threaded rod. A protrusion may be coupled to an end of the threaded rod by a rotatable collar, with the protrusion extending through a slot in the tube to mark the length of the strut. A modular attachment member may be adapted to be couple to the first joint and include a worm gear adapted to engage gear teeth of the actuation mechanism. The modular attachment member may include a radiofrequency identity tag mechanism adapted to be read by a tag reader of a tool, the tool adapted to couple to the attachment member to rotate the worm gear to increase or decrease the effective length of the strut.

Abstract: An orthopedic device includes a fixator body having a first part and a second part that are connected by a joint and having an internally threaded bore extending longitudinally therethrough. A first pair of opposed longitudinally extending slots is provided in the first part and a second pair of opposed longitudinally extending slots is provided in the second part. A first and second pin-holders are received within and threadably engage the internally threaded bore of the first part and the second part, respectively, and are configured to removably hold a first and second sets of one or more bone fixation pins extending through the first and second pairs of opposed longitudinally extending slots, respectively.

Abstract: A tool for implementing a correction plan in an external fixation frame having a plurality of adjustment elements or screws, for example, generally includes a driver, a motor, a controller, and a processor. The driver is adapted to engage and rotate each of the screws. The motor is coupled the driver and adapted to rotate the driver. The controller is connected to the motor and configured to control operation of the motor. The controller may determine whether the tool is engaged with a strut and which strut is engaged, and may determine how much the strut has rotated, taking into account intentional or unintentional manual rotation of the tool. The tool may also include features to help ensure proper engagement between the drive and the strut. Variations may be provided in which similar functionality is provided with manual rotation of a motorless tool.

Abstract: A clamp system includes a first clamp, a second clamp, and a fixation rod. The first clamp at least partially defines a first jaw for receiving a support rod and a central opening. The second clamp at least partially defines a second jaw for receiving a pin and a central opening. At least one of the first clamp and the second clamp comprises a boss for rotatably positioning the first clamp relative to the second clamp. The fixation rod is received in the central openings of the first clamp and the second clamp for selectively securing a position of the first clamp relative to the second clamp.

Abstract: A method and a device for bone adjustment in a mammal is presented, wherein a device is implanted in the medullar cavity of a bone in the body of said mammal, said device being a device exerting a force to anchoring devices anchored ins aid bone. The method and device has utility in therapeutic and cosmetic bone adjustments, including the lengthening, reshaping and realigning of bones, for example in the correction of congenital deformations, restorative orthopedic surgery and the like.

Abstract: Methods and devices are provided for manipulating a vertebra. In one embodiment, a surgical device can include a frame configured to couple two or more surgical instruments attached to one or more vertebrae. Coupling the two or more surgical instruments together, the frame and/or at least one of the surgical instruments can be manipulated to move at least one of the surgical instruments, thereby effecting movement at least one of the vertebra or vertebrae to which the surgical instruments coupled to the frame are attached. In this way, the surgical device can be used to facilitate rotation of a vertebra relative to another vertebra to correct the angular relationship of the vertebrae.

Abstract: A fixation system for fixing a bone fracture has a plurality of blocks, needles and rods that snap together in a framework around the fracture. The needles are inserted through the bone on opposite sides of the fracture and the blocks are snapped onto the ends of the needles. Rods are snapped onto the blocks on both sides of the finger to keep the finger in place. Each block has two channels located on opposite sides and extending perpendicular to each other. The channels are structured so that a rod or needle having a diameter equal or slightly greater than one of the channels can be snapped into and retained by the channel.

Abstract: The present disclosure relates to an anchoring group for an external fixator, that comprises a connecting body designed to be coupled to a bar of an external fixator. A locking device is connected to the connecting body at a fastening point thereof and comprises a pin locking arm provided with two seats suitable for locking a corresponding number of uni-cortical pins. A connection base is intended to be coupled to a connecting body of the anchoring group. An additional member, also associated with the connecting body, comprises at least one auxiliary seat, not aligned with the seats of the locking device, for locking an additional uni-cortical pin. In an additional embodiment, the connection base of the locking device extends in an angled relationship with respect to the pin locking arm and away from both the seats. The connection base has a point for fastening to the connecting body which is not aligned with said seats.

Abstract: An anchoring group (20) for an external fixator (1), comprising: a connecting body (11) designed to be coupled to a bar (2) of an external fixator (1), said connecting body (11) being crossed by a median plane (M); a first locking device (10) for locking first unicortical pins and connected to the connecting body (11), said first locking device (10) comprising at least one seat; and a second locking device (10) for locking second unicortical pins and also connected to the connecting body (11), said second locking device (10) comprising at least one auxiliary seat, which is not aligned with the at least one seat of the first locking device (10), said first and second locking devices (10) extending from different side of said median plane (M), wherein the connecting body (11) has at least two fastening seats (110a, 110b) for each the first and the second locking devices (10) so as to allow at least two alternative mounting configurations from each side with respect to the median plane (M) of the connecting body

Abstract: An external fixation clamp for receiving a fixation element includes an inner jaw and an outer jaw movable between an open position that permits the fixation element to be placed between the inner and outer jaws and a closed position that restricts removal of the fixation element from between the inner and outer jaws. A latch assembly may cooperate with the inner and outer jaws to secure the jaws in a closed position. The latch assembly may comprise a latch and a latch biasing member. The latch may be configured to translate linearly relative to one of the inner and outer jaws, and the latch biasing member may have a first higher level of stored energy when the inner and outer jaws are in the open position and a second lower level of stored energy when the inner and outer jaws are in the closed position.

Abstract: Devices for treating a bone and methods of inserting such devices into a bone are disclosed. A device for treating a bone may include a flexible tube, a stiffening mechanism and an actuator. The flexible tube has a distal end and a proximal end. The stiffening mechanism within the flexible tube is configured to cause the flexible tube to become rigid. The actuator is configured to cause the stiffening mechanism to cause the flexible tube to become rigid in response to the actuator being actuated.

Abstract: An external fixation frame for correcting a bone deformity includes a first fixation ring and a second fixation ring. A posterior adjustable length strut couples a posterior portion of the first fixation ring to a posterior portion of the second fixation ring and has universal joint. Medial and lateral adjustable length struts couples medial and lateral portions of the first fixation ring to medial and lateral portions of the second fixation ring respectively, each of the medial and lateral adjustable length struts including a constrained hinge joint. The fixation frame also includes a half ring hingedly coupled to the second fixation ring, and an anterior adjustable length strut coupling an anterior portion of the first fixation ring to the half ring.

Abstract: Disclosed herein are systems and methods for manipulating the orientation of a plurality of bone fragments with respect to one another. A bone transport frame including first and second rings, a plurality of elongate struts, and a plurality of ring transport assemblies for orienting a first bone segment with respect to a second bone segment is disclosed. A third ring may be included in the bone transport frame for orienting a third bone segment with respect to the first and second bone segments. Manipulation of an adjustable member of the bone transport frame can transport a ring in either a proximal or distal direction with respect to other rings of the frame. Manipulation of another adjustable member of the bone transport frame can translate a central axis of one of the rings either toward or away from the central axes of the plurality of elongate struts.

Abstract: A bone instrumentation cover or shield has a hollow cap or casing for encapsulating projecting parts of instrumentation installed in a bone, and a fastener portion for securing it to the bone or to parts of the instrumentation. The instrumentation shield or cover is made of medically safe material, in various sizes, and may be a rigid casing or pliable, stretchable, or adaptable with slidable, displaceable or pleated panels to provide a medically safe physical barrier between projecting parts of bone instrumentation constructs and surrounding bone and soft tissues, in order to minimize local irritation or injury and to provide a barrier to ingrowth from bone and/or fibrous tissues. The cap or casing is readily applied over the instrumentation, then cinched, tied or fastened to the instrumentation or adjacent areas.

Abstract: Fixation device for pins to be attached to an external fixation system, comprising: a first attachment or clamp comprising a first pair of opposite jaws (2) for housing at least one pin, said first pair of jaws (2) being formed by a lower jaw element (20) and an upper jaw element (30); a second attachment comprising a second pair of opposite jaws (6) that define together at least one seat for housing a rod of the external fixation system; a first clamping screw (4) for clamping the first pair of jaws (2) in order to lock in position the at least one pin, said first clamping screw (4) screwing along a screw axis (X); one of said jaw elements (30) of the first pair of jaws (2) having at least one appendix (33) on its outer edge that is shaped to interact with a corresponding recess (23) made on the other jaw element (20) of the first pair of jaws (2) so that the only possible sliding will be along the screw axis (X) of the first clamping screw (4) a second clamping screw (5) for clamping the second pair of jaws

Abstract: A bone plate is configured for pancarpal arthrodesis. The bone plate can include a plurality of apertures that can be aligned with the metacarpal bones. The apertures can include a first portion and second portion that is longitudinally and laterally offset with respect to the first portion.

Abstract: The invention concerns an anatomically personalized and mobilizing external support configured to be arranged to support a physical joint between a first and a second bone group, which support comprises at least one first external auxiliary frame, which is configured to be attached to the first bone group using invasive attachment means, at least one second external auxiliary frame, which is configured to be attached to the second bone group using invasive attachment means, and at least one external auxiliary joint, which is fitted between the first and the second auxiliary frame.

Abstract: A spinal fusion device for implantation between spinal vertebrae includes an implant member having an opposed upper and lower surface, an outer sidewall having an aperture having internal threads, and an inner sidewall defining a central opening. A plate member is attached to the implant member such that the plate member is perpendicular relative to the implant member and includes a plurality of angled apertures for receiving anchoring fasteners and a central aperture for receiving a locking fastener. A locking member is attached to the cage member. The locking member includes a tubular shaft having internal threads that is inserted through the aperture of the outer sidewall of the implant member. A locking fastener is inserted through the central aperture of the plate member and into the locking member to thereby lock the spinal fusion device in position.

Abstract: Dynamization struts and methods of use are provided. A dynamization strut may comprise a sleeve, a shaft, a biasing member, and a bushing. The sleeve may comprise an inner recess with a first and second section. The shaft may comprise an interior section to be disposed within the inner recess of the sleeve. The biasing member may be disposed around the interior section of the shaft, and sized to fit within the first section of the inner recess of the sleeve. The bushing may be secured against a portion of the shaft. Rotation of the bushing may provide for compressive movement of the biasing member relative to the sleeve and shaft. Compression of the biasing member may occur without a corresponding change in a total length of the dynamization strut. Rather, changes in the length of the strut may occur as a result of external compressive forces acting upon it.

Abstract: The present application discloses embodiments related to an external bone fixation device configured to correct bone deformities or repair bone injuries. The device can include a plurality of bases configured to be attached to portions of a bone and a plurality of struts configured to be adjustable in length to change the position and orientation of the plurality of bases and the attached bone portions.

Abstract: A mandibular distractor device is configured for attachment to opposing sides of a mandible, e.g., a rabbit's mandible, for performing distraction osteogenesis. The distractor device includes a distractor body and an activation bar that extends through the distractor body. The activation bar can be disposed within the body such that a threaded portion of the bar is threaded to an interior wall of the anterior plate, while a smooth portion of the bar extends within the posterior plate. Once the distractor is secured to the mandible, the activation bar can be rotated incrementally to incrementally disengage the threaded portion of the activation bar from the threaded interior wall of the anterior plate. Rotation of the activation bar in this manner incrementally moves the anterior plate anteriorly within the rabbit's mouth, while the posterior plate remains in position.

Abstract: An external fixator system includes a proximal frame configured to restrict motion in a lower extremity of a subject, and a frame connector assembly. The proximal frame includes a first, second, and third component. The first component can support a first clamp to secure a first pin inserted within a bone extending between a foot and a knee of the lower extremity. The third component extends from a second end of the second component. The first, second and third components have longitudinal axes that are substantially coplanar. The third component includes an extension to extend over a dorsal portion of the foot of the subject and to support a second clamp to secure a second pin inserted within a bone of the foot. The frame connector assembly extends from the second component to support a third clamp to secure a third pin inserted within a third bone of the foot.

Abstract: An adjustable fixation clamp having first and second clamp assemblies positioned about a shaft. The clamp assemblies may each have a pair of vise plates. Each pair of vise plates may define at least two receiving portions and insertion portions intersecting the receiving portions. The receiving portions of one clamp assembly may receive at least two fixation components such as screws, pins or wires. The receiving portions of the other clamp assembly may receive at least one connector such as a rod, bar and/or ring. A biasing structure may be positioned between the first and second clamp assemblies and may allow for the fixation components to be snapped into the receiving portions through the insertion portions. Two or more adjustable fixation clamps may be used to form an external fixation system. At least two screws, pins or wires may be inserted into bone and one of the clamp assemblies may be attached thereto. A guide may be used for insertion of screws, pins or wires into bone.

Abstract: A fixation clamp for use in an external fixation system for holding bone fragments adjacent to each other with the help of fixation elements has at least one clamping assembly having a pair of jaws with at least two different size grooves to accommodate a bone fixation element such as a pin or rod. An alternate clamping assembly has at least three grooves wherein at least two of the grooves have a different size adapted to accommodate a correspondingly sized bone fixation element such as a bone pin. The longitudinal axes of the grooves define a polygon. The jaw pairs can be rotated about a central longitudinal axis to present different size reception cavities towards the pins or rocks depending on their diameter.

Abstract: A facet joint replacement system includes an inferior implant with an inferior articular surface, a superior implant with a superior articular surface, and an optional crossbar. The inferior implant and the superior implant are each polyaxially adjustably connected to fixation elements which anchor the implants to adjacent vertebrae. The optional crossbar may be polyaxially adjustably connected to bilateral implants. The system components may be provided in kits which provide components of various sizes and shapes. A set of surgical instruments may facilitate implantation of the facet joint replacement system by providing tools for bone preparation, trialing, implant insertion, implant alignment, and lock-out of modular interconnections.

Abstract: A prosthesis for primary artrodhesis can be used for artroplasty and a prosthesis for artroplasty comprises members for artrodhesis. The prosthesis (1b) for primary artrodhesis comprises a locking member (33b) with an attachment portion (16b) which is insertable into a hole (8b) in a first attachment member (4b) of the prosthesis for location of the locking member therein, and a lockable member (34b) integral with a second attachment member (5b) of the prosthesis. The lockable member (34b) is configured for adjustable setting thereof relative to the locking member (33b) and for fixation thereof, in set position, to the locking member. Alternatively, the lockable member comprises an attachment portion which is insertable into a hole in the second attachment member for location of the lockable member therein.

Abstract: The invention discloses methods, devices, systems and kits for repairing, replacing and/or augmenting natural facet joint surfaces and/or facet capsules. An implantable facet joint device of one embodiment comprises a cephalad facet joint element and a caudal facet joint element. The cephalad facet joint element includes a member adapted to engage a first vertebra, and an artificial cephalad bearing member. The caudal facet joint element includes a connector adapted for fixation to a second vertebra at a fixation point and an artificial caudal bearing member adapted to engage the cephalad bearing member. The artificial caudal bearing member is adapted for a location lateral to the fixation point.

Abstract: A drill guide includes a first bone plate that extends along a first middle plane, and a second bone plate that extends along a second middle plane. The drill guide further includes a first articulation and a second articulation that is connected to the first articulation. The first and second articulations are arranged between the first and the second bone plate. Each of the first and second articulations is releasably lockable.

Abstract: An orthopedic external fixation system may include a distal bar having a curvature that varies along its length, an uncurved proximal bar, a plurality of proximal embedding members, and a plurality of distal embedding members. The proximal and the distal embedding members, sized and shaped for embedding in bone, may attach directly or indirectly to the proximal bar and the distal bar, respectively.

Abstract: The present disclosure includes an external fixator ring that includes a central opening, inner and outer ring surfaces and upper and lower ring surfaces. In some embodiments, one or more apertures are defined in the inner or outer surface for receiving securing devices. The apertures in the inner or outer surface are adapted to provide rigid attachment for connection struts while allowing for a range of motion between the interconnected rings. In some other embodiments, the external fixator ring further comprises angled flanges extending radially from the inner or outer surface. The angle flanges each include a mounting surface, apertures are defined in the mounting surface of the angle flanges for receiving securing devices.

Abstract: A device for the external fixation of a first bone element and a second bone element articulated to each other, comprises: a guide member equipped with a curvilinear guide; a first fastening member slidably associated with the guide and equipped with first means for releasable fastening to the first bone element; a second fastening member associated with the guide member and equipped with first means for releasable fastening to the second bone element; and relative movement means by which the first fastening member is moved relative to the second fastening member along the guide.

Abstract: The present disclosure relates to an external fixation apparatus comprising a strut having a longitudinal axis defined therein, the strut comprising a strut housing having a housing adjustment aperture, an adjustment sleeve slidably disposed within the strut housing, and a fastener that releasably couples the strut housing with the adjustment sleeve. An embodiment of the adjustment sleeve comprises a first and a second bore extending from a top towards a bottom surface of the adjustment sleeve, a first sleeve member with a proximal end, a distal end, and an axial bore, and a second sleeve member adjoining the first sleeve member. In an embodiment, the second sleeve member comprises a body and a beveled end that is slidably disposed within the axial bore of the first sleeve member. The adjustment sleeve further comprises a biasing mechanism between the first sleeve member and the second sleeve member.

Abstract: A fixation clamp is used in an external fixation system for holding bone fragments adjacent to each other with the help of fixation elements. The clamp has at least one clamping assembly having at least one reception to accommodate a fixation element along the longitudinal axis of the reception and at least one locking element extending through the clamping assemblies for blocking the position of the clamping assemblies in a defined angular position. Between the locking element and the at least one clamping assembly there is arranged a washer. The clamping assembly comprises a first contact surface and the washer comprises a second contact surface wherein the first contact surface is in contact with the second contact surface. The washer has a through bore and an opening extending radially from the bore to an outer surface of the washer.