Abstract: A medical device can include a first anchor for attachment to a first bone fragment and a second anchor for attachment to a second bone fragment. The second anchor attachment can be coupled to the first anchor via a compression element between the first anchor and the second anchor. The medical device can include a resorbable element maintaining the first anchor and the second anchor at a first distance. The resorbable element can be configured to at least partially resorb after insertion into a patient. After the resorbable element is at least partially resorbed, the compression element forces the first anchor and/or the second anchor to translate such that the first anchor and the second anchor are at a second distance, thereby compressing the first bone fragment and the second bone fragment.

Abstract: A compression device may include, but is not limited to, a threaded body, a sliding element, and a compression element connecting the threaded body and the sliding element. According to one embodiment, upon implantation, the threaded body contacts a first bony fragment and the sliding element contacts to a second bony fragment. In at least one embodiment, upon being engaged, the compression element applies sustained tension to the sliding element and opposing tension to the threaded body, thereby compressing the first bony fragment and the second bony fragment along a plane of contact promoting healing.

Abstract: A subtalar implant that can be expanded/contracted in vivo to adjust the amount of distraction applied to the subtalar joint of a patient and a related insertion device are disclosed herein. More specifically, the subtalar implant can expand both radially and also in the angle between the proximal and distal end of the outer component of the implant. The implant comprises an internal component that allows for the distal or proximal ends of the implant to be manipulated via the insertion device. The subtalar implant and the related insertion device permit a surgeon to adjust the implant construct to suit a particular patient.

Abstract: An improved bone screw is disclosed which includes a shaft with distal portion having a threaded surface thereon, a sleeve having an opening which receives the shaft such that the shaft is able to move within the sleeve without moving the sleeve. A compressive device may be incorporated between the sleeve and the proximal portion of the shaft such that the compressive device forces the shaft and sleeve towards at least a portion each other, thereby maintaining the compressive load at the union of the fracture. As additional compression is exerted on the load from weight bearing, the force may be reduced, but the head of the sleeve is still substantially maintained against the lateral cortex.

Abstract: An intervertebral implant system is disclosed which includes a spinal spacer for engagement between vertebrae and at least one semi-constrained bone screw assembly. The spinal spacer includes a body extending between first and second end surfaces to define opposing top and bottom vertebral engaging surfaces. The second end surface of the body includes at least one aperture formed therethrough at an angle relative to the centerline axis and a screw opening defined therethrough. The semi-constrained bone screw assembly is adapted for insertion through the screw opening and includes a shank, a head and a rod member. The rod member is fixedly engageable with the shank and moveably coupled to the head such that both the rod member and the shank are moveable with respect to the head.

Abstract: The apparatus and method is directed to a pair of self-tapping, interconnecting, externally and internally threaded devices that, when installed between two separate pieces of material, will draw and hold the material together as a single threaded unit. While the pair of threaded devices are being fastened into the host material, due to the unique design of their threads, no radial outward forces are produced that could cause cracking or splitting of the sections of the material into which they are installed. The external threads are helically defined into the exterior of each half of the device with a right hand thread defined into one half and a left hand thread into the other half. When the two halves are being fastened together, the increased thread pitch on one of the halves continuously draws the halves into each other even when the internal threads have already been maximally tightened.

Abstract: An implantable fixation system for fusing a joint between a first bone and a second bone. The system may include an anchor, standoff, bolt, and cortical washer. The system may be implanted across the joint along a single trajectory, the length of the system adjustable to provide compressive force between the anchor and the cortical washer. The system may be implanted across a tibiotalar joint with the anchor positioned in the sinus tarsi. A spacing member may be inserted between the two bones and the fixation system implanted to extend through an opening in the spacing member. The spacing member may be anatomically shaped and/or provide deformity correction. An ankle arthroplasty system may include a tibial plate, a talar plate, and a bearing insert. The plates may be anchored to the tibia and talus along a single trajectory. The ankle arthroplasty system may be revisable to a fusion system.

Abstract: The present teachings provide one or more surgical implements for repairing damaged tissue, such as in the case of a spinal fixation procedure. A bone anchor is provided. The anchor can include a bone fastener. The bone fastener can include a head and a second end adapted to engage an anatomy. The bone fastener can extend along a longitudinal axis. The anchor can also include a coupling arrangement coupled to the head of the bone fastener so that the bone fastener is rotatable about the longitudinal axis to define a first plane of motion. The anchor can further include a saddle, which can be coupled to the coupling arrangement. The saddle can be movable relative to at least one of the bone fastener and the coupling arrangement to define a second plane of motion.

Abstract: An implant fixation assembly for securing an implant to a bone includes a first member, a stem, a biasing member and a tensioner. The first member includes a bone-engagement surface. The stem extends from the first member for insertion into a bore formed in the bone. The biasing member biases a distal portion of the stem toward the bone-engagement surface. The tensioner pre-tensions the biasing member.

Abstract: The present invention includes a surgically implantable device, system, and method of use thereof for the internal compression or distraction of, for example, bone fractures, fusions, and osteotomies. More specifically, the surgical device comprises a bridge with one or more adjustable anti-reversing portions. The adjustable anti-reversing portion(s) may be located in a symmetrical or asymmetrical manner on the bridge between the device's legs. The adjustable anti-reversing portion(s) allow for stronger compression of the bone at a known amount of compression. The adjustable anti-reversing portion(s) can also maintain the device's legs in closer proximity to one another for greater compression or maintain the device's legs apart from one another for distraction. The surgical device can also comprise cannulated or grooved legs. A system and method of use is also described.

Abstract: Surgical anchoring systems and methods are employed for the correction of bone deformities. The anchoring system and its associated instrument may be suitable for surgical repair of hallux valgus, tarsometatarsal sprains, ankle ligament reconstruction, spring ligament repair, knee ligament reinforcement, acromioclavicular sprains, coracoclavicular sprains, elbow ligament repair, wrist and hand ligamentous stabilization or similar conditions. The anchoring system may include a fixation system for anchoring two or more sections of bone or other body parts and a system for aligning of one section relative to another section.

Abstract: An improved bone screw is disclosed which includes a shaft with distal portion having a threaded surface thereon, a sleeve having an opening which receives the shaft such that the shaft is able to move within the sleeve without moving the sleeve. A compressive device may be incorporated between the sleeve and the proximal portion of the shaft such that the compressive device forces the shaft and sleeve towards at least a portion each other, thereby maintaining the compressive load at the union of the fracture. As additional compression is exerted on the load from weight bearing, the force may be reduced, but the head of the sleeve is still substantially maintained against the lateral cortex.

Abstract: Assemblies for implantation across one or more spinal motion segments to allow for control of the distance between bone anchors. Control of distance between bone anchors may be provided by one inter-anchor element pushing the pair of bone anchors apart and a second inter-anchor element pulling the pair of bone anchors together. Control of distance between bone anchors may be provided through use of dissimilar thread pitch. Compression of intervertebral disc space through controlled movement of a pair of anchored bone anchors towards one another.

Abstract: A bone repair system and method for percutaneously fixing a first bone segment to a second bone segment, such as rib bone segments, in a body of a patient include drilling a first hole through the first bone segment and a second hole through the second bone segment, and feeding a first tether through the first hole and a second tether through the second hole, each tether having a proximal end and a distal end. The first and second tether distal ends are withdrawn from the body while the first and second tether proximal ends have not passed through the first and second bone segments, respectively. A reinforcing member, such as a bone plate, having first and second openings, is passed onto the first and second tether distal ends, and the reinforcing member is pulled into engagement with the first and second bone segments guided by the tethers.

Abstract: Embodiments of the invention are directed to a distal interphalangeal (“DIP”) fusion device for connecting a first bone of a patient to a second, adjacent bone of the patient. The device may include an anchor assembly and a compressor assembly. In another embodiment, a separate compressor base assembly is included. In yet another embodiment an access port assembly is included. The anchor assembly is rotationally coupled to one end of the compressor assembly, such that the compressor assembly may rotate about the anchor assembly within a semi-spherical zone (three degrees of rotational freedom) and translate axially (one degree of translational freedom). In an operative position, the anchor assembly is anchored in an intermediate phalanx of a digit of a patient, the compressor assembly is contained in a distal phalanx of the digit, and the distal phalanx is flexed relative to the intermediate phalanx to create a joint angle.

Abstract: An improved bone screw is disclosed which includes a shaft with distal portion having a threaded surface thereon, a sleeve having an opening which receives the shaft such that the shaft is able to move within the sleeve without moving the sleeve. A compressive device may be incorporated between the sleeve and the proximal portion of the shaft such that the compressive device forces the shaft and sleeve towards each other, thereby maintaining the compressive load at the union of the fracture. As additional compression is exerted on the load from weight bearing, the force may be reduced, but the head of the sleeve is still substantially maintained against the lateral cortex.

Abstract: Surgical anchoring systems and methods are employed for the correction of bone deformities. The anchoring system and its associated instrument may be suitable for surgical repair of hallux valgus, tarsometatarsal sprains, ankle ligament reconstruction, spring ligament repair, knee ligament reinforcement, acromioclavicular sprains, coracoclavicular sprains, elbow ligament repair, wrist and hand ligamentous stabilization or similar conditions. The anchoring system may include a fixation system for anchoring two or more sections of bone or other body parts and a system for aligning of one section relative to another section.

Abstract: A collapsible bone screw for healing bone fragments across a bone fracture includes an externally threaded inner screw member and an externally threaded outer screw member. The inner screw member is initially screwed into an inner bone portion. An unthreaded portion of the outer screw member is movably joined to the inner screw member. The outer screw member is screwed until it gains purchase in an outer bone portion. As impaction occurs over time, the collapsible bone screw apparatus may shorten in length as the two screw members slide, telescope or otherwise axially move toward each other to shorten the overall length, thereby preventing any portion of the screw apparatus from protruding out of the bone. A bone screw kit of multiple inner and outer screw members are provided as well as a method of surgically fastening bone fragments.

Abstract: System, including methods, apparatus, and kits, for connecting bones and/or bone portions using a bone connector with a pivotable joint.

Abstract: Disclosed is a bone fracture fixation device, such as for reducing and compressing fractures in the proximal femur. The fixation device includes an elongate body with a helical cancellous bone anchor on a distal end. An axially moveable proximal anchor is carried by the proximal end of the fixation device. The device is rotated into position across the fracture or separation between adjacent bones and into the adjacent bone or bone fragment, and the proximal anchor is distally advanced to apply secondary compression and lock the device into place. The device may also be used for soft tissue attachments.

Abstract: A pedicle screw assembly has a retractable screw tip that facilitates the securement of the pedicle screw assembly to a spinal vertebra in a minimally invasive fashion during an orthopedic surgical procedure. The pedicle screw assembly includes a body portion including a head and a shank. The shank includes an outer surface with a thread provided thereon, an end having a cutting tip provided thereon, and a bore extending inwardly from the end and having an internally threaded region provided therein. The pedicle screw assembly also includes a tip portion including a body having a cutting edge and a shank extending from the body. The shank has an externally threaded region provided thereon that cooperates with the internally threaded region of the bore to permit movement of the tip portion relative to the body portion between extended and retracted positions.

Abstract: A pedicle screw assembly has a retractable screw tip that facilitates the securement of the pedicle screw assembly to a spinal vertebra in a minimally invasive fashion during an orthopedic surgical procedure. The pedicle screw assembly includes a body portion including a head and a shank. The shank includes an outer surface with a thread provided thereon, an end having a cutting tip provided thereon, and a bore extending inwardly from the end and having an internally threaded region provided therein. The pedicle screw assembly also includes a tip portion including a body having a cutting edge and a shank extending from the body. The shank has an externally threaded region provided thereon that cooperates with the internally threaded region of the bore to permit movement of the tip portion relative to the body portion between extended and retracted positions.

Abstract: A bone fixation device includes one or more springs and one or more spacers disposed between two orthopedic structures. The orthopedic structures may comprise screws, rods, plates, or any other orthopedic devices configured to engage bone. The spacer may be absorbable or removable, and may serve to constrain the spring in a compressed or stretched state so that, upon absorption or removal of the spacer, the spring may apply tension or compression to surrounding bone. The device may thereby facilitate healing or bone or remodeling of soft tissues.

Abstract: An implantable fixation system for fusing a joint between a first bone and a second bone. The system may include an anchor, standoff, bolt, and cortical washer. The system may be implanted across the joint along a single trajectory, the length of the system adjustable to provide compressive force between the anchor and the cortical washer. The system may be implanted across a tibiotalar joint with the anchor positioned in the sinus tarsi. A spacing member may be inserted between the two bones and the fixation system implanted to extend through an opening in the spacing member. The spacing member may be anatomically shaped and/or provide deformity correction. An ankle arthroplasty system may include a tibial plate, a talar plate, and a bearing insert. The plates may be anchored to the tibia and talus along a single trajectory. The ankle arthroplasty system may be revisable to a fusion system.

Abstract: The invention facilitates the fixation of bone fractures. In a particular embodiment, a method for fixing bone fractures comprises the steps of: inserting a head component coupled to a wire through a first bone portion and anchoring the head component in a second bone portion, inserting a cap over the wire toward the head component until the cap contacts the second bone portion, and applying pressure to the wire using a tensioner to reduce the distance between the first bone portion and the second bone portion. The excess wire beyond the cap can then be removed.

Abstract: Mechanisms for connecting an elongated member for orthopedic support or therapy to bone or other tissue are disclosed. Embodiments may include a receiver member with a channel for accommodating an elongated member such as a spinal rod and a channel for accommodating a bone-engaging member, a bone-engaging member that is insertable into the channel in the receiver member, and a lock member for locking the receiver member, bone-engaging member, and elongated member together. The channels may be variously oriented with respect to each other. Methods for using such embodiments are also disclosed.

Abstract: The present invention is an apparatus and method for stabilizing the facet joints of the spine. One aspect of the present invention is the stabilization of the facet joint by insertion of a facet implant through two opposing facet surfaces. The facet joint is not fixedly frozen by insertion of the screw, but instead the facet surfaces are flexibly and movably anchored to preserve movement because the screw or anchor includes a flexible intermediate portion which is positioned between the facet surfaces. The facet implant may be in the form of a screw or other anchor with the intermediate portion in the form of a polyaxial head, a cord, a spring, etc. The facet implant may furthermore be used in conjunction with a facet spacer that is placed between the first and second facet.

Abstract: An intramedullar distraction device for bone elongation that is completely mechanical in operation, wherein a novel rotating button system allows inverting the device ratchet movement, thereby enabling the reduction of the length of the device, if needed, in order to offer the surgeon operating flexibility before finally anchoring the device on the bone. Furthermore, a locking system allows for locking the ratchet once the desired elongation has been reached, thus avoiding potential mistaken elongations. In addition, a unique alignment hole provides a simple, precise tool to easily and correctly align the device within the bone. The present device operates without the assistance of external mechanisms, motors, or tools, and once inserted, the user can actuate the device without assistance. This device is available in a wide variety of diameters and lengths, and is useful in all long bones.

Abstract: A collapsible bone screw for healing bone fragments across a bone fracture includes an externally threaded inner screw member and an externally threaded outer screw member. The inner screw member is initially screwed into an inner bone portion. An unthreaded portion of the outer screw member is movably joined to the inner screw member. The outer screw member is screwed until it gains purchase in an outer bone portion. As impaction occurs over time, the collapsible bone screw apparatus may shorten in length as the two screw members slide, telescope or otherwise axially move toward each other to shorten the overall length, thereby preventing any portion of the screw apparatus from protruding out of the bone. A bone screw kit of multiple inner and outer screw members are provided as well as a method of surgically fastening bone fragments.

Abstract: This document discusses, among other things, fiducial marker devices, tools, and methods. One example illustrates a combined computed tomography (CT) imagable fiducial locator head, an integral bone screw, and an integral divot for receiving a positioning wand of an image-guided surgical (IGS) workstation. A further example includes a fluid/gel-absorbing coating or cover into which a magnetic resonance (MR) imagable fluid is introduced, thereby permitting both CT and MR imaging. Protective caps and collars may be used to protect the fiducial marker from mechanical impact and/or to guide the fiducial marker during affixation. A bull's-eye or other template is used to select a center of a substantially spherical fiducial marker head on an image, such as for use during patient registration.

Abstract: The invention facilitates the fixation of bone fractures. In a particular embodiment, the head component includes a tip, cutting threads and mating threads which are inserted into the far cortex of the bone. A wire extends from the head component and exits from the near cortex. A cap device having a sawtooth inner surface is threaded over the wire having an inverse sawtooth outer surface such that the cap is restricted from backwards movement. Tension is then applied to the wire while the cap is tightened against or within the bone surface to thereby apply an appropriate amount of pressure between the surfaces of the fracture. The excess wire beyond the cap can then be removed.

Abstract: A method of bone fixation comprises engagement of internal threads on an implantable object associated with the bone at one side of the fracture with the external threads on the shaft of another implantable object associated with the bone at the opposite side of the fracture. The preferred embodiment comprises two cannulated screws of different diameters which associate with the bones at the opposite sides of the fracture via their screw heads contacting the bone surfaces, and the screws are screwed into the bones manually or drilled towards each other and engage by means of internal threads of the larger-diameter cannulated screw and the external threads of the smaller-diameter cannulated screw. The engagement of the two cannulated screws is aided by a guiding mechanism.

Abstract: A fixation mechanism and method of fixation, such as the fixation of a facet resurfacing implant to an articular facet of a spinal vertebra. The fixation mechanism includes a securing mechanism having a socket configured to receive a knob of a biologic implant. The fixation mechanism further includes a locking mechanism for limiting expansion of the socket following engagement with the knob of the implant.

Abstract: An adjustable jacking implant useful in orthopedic surgery and associated methods are disclosed. The implant may be used to adjust the position of bones or other structures with respect to one another. In one embodiment, the implant may include a jack base, a jacking segment and a compressible spacer or sleeve. The implant may be inserted through a single stab or puncture entry. Jack base is placed in a first portion of a vertebra via a hole in an adjacent vertebra, in one embodiment, and the jacking segment is placed in the adjacent vertebra and connected to the base. After being connected, the depth of the adjustable portion of jacking segment in its vertebra determines the spacing between portions of the adjacent vertebrae.