Abstract:
A subtalar joint replacement is provided. The subtalar joint replacement device includes a talar component, a calcaneal component, and an insert that is movable relative to the calcaneal component. The insert can be joined to or integrally formed with the calcaneal component. A basic surgical technique for implanting the subtalar joint arthoplasty/replacement is also described.
Abstract:
A subtalar joint prosthesis (1) that is adapted to replace the natural subtalar joint that exists between a patient's talus and calcaneus bones includes talar (2) and calcaneal (4) components. Each of these is configured to have a shape that is herein defined as being a portion of the boundary surface of a frustum. Meanwhile, these components' inner (8, 28) surfaces are configured to: (a) generally follow the anatomic contour of the original joint surface to which each component is to be attached, and (b) minimize each component's average thickness, consistent with providing sufficient strength and rigidity for the components, so as to require minimum bone resection for the implantation of these components.
Abstract:
Devices and methods compress cancellous bone. In one arrangement, the devices and methods make use of and expandable body that includes and internal restraint coupled to the body. The internal restraint directs expansion of the body. In one arrangement, a method for treating bone inserts the device having the internal restraint inside bone and causes directed expansion of the body in cancellous bone. Cancellous bone is compacted by the directed expansion.
Abstract:
An implant is provided for use in an ankle joint between reconditioned end surfaces established on a distal end of an upper tibia bone and an opposing lower talus bone. The implant comprises a substantially porous rigid component adapted to be anchored against the upper tibia reconditioned end surface and the lower talus reconditioned end surface. The component defining an opening therethrough. An intramedullary nail is configured to pass through the opening in the component when the nail is driven through the talus and into the tibia.
Abstract:
Various systems, and methods are provided for transporting a therapeutic agent to the interior of a skeletal support structure. In one implementation, a first elongated member, a second elongated member and an expandable structure provide for non-axial access to the interior of a skeletal support structure. The second elongated member is configured to transport a radiation source through a lumen in the first elongated member to the interior of the skeletal support structure.
Abstract:
A first implant (102) may be configured for attachment to a talus bone (101). A second implant (106) may be configured for attachment to a calcaneus bone (105). The first implant (102) attached to the talus bone (101) can move in relation to the second implant (106) attached to the calcaneus bone (105). A sheet (104) can be disposed between the first implant (102) and the second implant (106) to facilitate relative motion between the first implant (102) and the second implant (106). The sheet (104) may provide a curvilinear surface (1 18) that engages a curvilinear surface (1 14) of the first implant (102) or a curvilinear surface of the second implant (106) to facilitate the relative motion. A set of tools (144) may be used to distract the talus bone (101) from the calcaneus (105), which may be used for insertion of the implants (102, 106).
Abstract:
A balloon (10) for use in compressing cancellous bone and marrow (also known as medullary bone and trabecular bone) against the inner cortex of bones whether the bones are fractured or not. The balloon comprises an inflatable, non-expandable balloon body (12, 14) for insertion into said bone. The body has a shape and size to compress at least a portion of the cancellous bone to form a cavity in the cancellous bone and to restore the original position of the outer cortical bone, if fractured or collapsed. The balloon is prevented from applying excessive pressure to the outer cortical bone. The wall or walls of the balloon are such that proper inflation of the balloon body is achieved to provide for optimun compression of all of the bone marrow. The balloon is folded so that it can be easily inserted into a bone. The balloon can be made to have a suction catheter (16). The main purpose of the balloon is the forming or enlarging of a cavity or passage in a bone, especially in, but not limited to, vertebral bodies.
Abstract:
A subtalar joint implant (20) is disclosed for replacing a natural subtalar joint existing between the talus (102) and calcaneum (104) bones of a patient. In an embodiment the implant comprises talar (22) and calcaneal (24) portions that are configured to slide over each other in the implanted state. The implant is shaped so that the sliding is constrained to trajectories that involve pivoting of the talar portion relative to the calcaneal portion about a pivot point (36) or a line (38) of pivot points.
Abstract:
A prosthesis including a magnetic implant approximating the size of a bone to be replaced; a first magnetic bone implant securable to a first bone adjacent the bone to be replaced; and a second magnetic bone implant securable to a second bone adjacent the bone to be replaced. Each of the first and second magnetic bone implants have a magnetic relationship with the magnetic implant. A method of reconstructing a wrist includes removing a patient's scaphoid to create a void. The scaphoid has a plurality of adjacent bones, each of the adjacent bones comprising a surface generally facing the void. The surface of at least two of the adjacent bones is prepared by affixing a magnetic element thereto and a magnetic scaphoid implant is inserted into the void. A magnetic relationship exists between the magnetic elements and the magnetic scaphoid implant.
Abstract:
An implant for fixation of first and second bones having a body with first and second axially spaced ends and an outer surface at least nominally matched to a tapered surface around a receptacle formed by rotating a cutting element around an axis. As the body is advanced along the central axis into an operative position within the receptacle, the body outer surface and tapered surface cooperate to cause the central and second axes to consistently substantially align. A plurality of openings in the body each accepts a fastener.