Bone implant with means for multi directional force and means of insertion
Inventors
Hartdegen, Vernon R. • Hollis, Michael Chad • Coleman, Glen • Sayger, Daniel
Assignees
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Publication Number
US-11998191-B2
Publication Date
2024-06-04
Expiration Date
Abstract
An assembly used in osteosynthesis comprising a delivery instrument in combination with an implant wherein the delivery instrument releasably holds the implant in a first configuration prior to attachment of the implant to bone. The delivery instrument allows the implant to be affixed to bone before the implant is released from the instrument. And the instrument may comprise guide means for drills, depth gauges, screws, pins, pegs, blades and or drivers which are used or implanted when the implant is releasably attached to the instrument. After the implant is affixed to bone and released from the delivery instrument, the implant assumes at least a second configuration which provides compression and or distraction and or control of spatial orientation.
Core Innovation
The invention relates to a tissue fixation system in which an implant is movable between a first configuration and a second configuration, and an inserter is used to place the implant against a tissue and then cause a change in the implant configuration. The implant is fully seatable in a final position against a tissue when the implant is in the first configuration, and after seating, the inserter disconnects from the implant so that the implant moves from the first configuration to the second configuration.
In the described systems, the movement from the first configuration to the second configuration applies compressive force to the tissue when the implant is in the second configuration. One configuration uses a rod threadedly mated with a body and a knob rotatably coupled to the rod, such that rotation of the knob relative to the body causes the implant to move to the first configuration when the inserter is connected. The inserter further includes an arrangement that disengages when the implant is fully seated, thereby transitioning the implant to the second configuration for compression.
Another described configuration uses first and second arms that are spring-biased toward a closed position, where the arms are movable between an open position and a closed position. When the arms are in the open position, the arms receive the implant, and moving the arms to the closed position connects to the implant such that the inserter is actuatable to move the implant from the first configuration to the second configuration. After the implant is fully seatable in a final position against the tissue in the first configuration, the arms move from the closed position to the open position to disconnect from the implant, thereby enabling the implant to move from the first configuration to the second configuration and apply a compressive force.
Claims Coverage
The document provides two independent claims, each directed to a tissue fixation system with an implant movable between first and second configurations and an inserter that transitions the implant to apply compressive force after disconnection or after arm disconnection.
Movable implant between first and second configurations with sequenced inserter disconnection for compression
An implant movable between a first configuration and a second configuration, and an inserter that disconnects from the implant when the implant is fully seated in a final position against a tissue, whereby the implant moves from the first configuration to the second configuration to apply a compressive force to the tissue when the implant is in the second configuration.
Increaser knob-rod inserter shifting implant to first configuration then compressing on disconnect
A tissue fixation system comprising an implant movable between a first configuration and a second configuration, and an inserter including a body with a width less than a length and greater than a thickness, a rod threadedly mated with the body along a central axis, an open void space extending entirely through the body with a total length along the central axis greater than half the length of the body, and a knob rotatably coupled to the rod such that rotation of the knob causes the implant to move to the first configuration when the inserter is connected, with the inserter configured to disconnect from the implant when fully seated so that the implant moves to the second configuration and applies compressive force.
Spring-biased pivoting arms inserter that releases implant after final seating to enable compressive-force configuration
A tissue fixation system comprising an implant movable between a first configuration and a second configuration, and an inserter connectable to the implant, the inserter having a body and first and second arms pivotable relative to the body between an open position and a closed position, with the first and second arms spring-biased toward the closed position; moving the arms to the closed position connects to the received implant so that the inserter moves the implant from the first configuration to the second configuration; the implant is fully seatable in a final position against a tissue when the implant is in the first configuration; and the arms move from the closed position to the open position to disconnect from the implant when the implant is in the final position, whereby the implant moves from the first configuration to the second configuration to apply compressive force.
Interlock component preventing open-to-closed motion of spring-biased arms
The tissue fixation system in which the inserter further comprises an interlock component positionable between the first and second arms so as to prevent the arms from moving from the open configuration to the closed configuration.
Across the independent claims, the core coverage is a movable implant coupled to an inserter that transitions the implant between a fully seatable first configuration and a second configuration that applies compressive force, with the inserter or arms disconnecting after seating and, in one version, providing an interlock component that prevents open-to-closed motion of the spring-biased arms.
Stated Advantages
Applies a compressive force to the tissue when the implant is in the second configuration.
Enables the implant to be fully seatable in a final position against a tissue when the implant is in the first configuration.
Disconnecting of the inserter from the implant when fully seated supports movement of the implant from the first configuration to the second configuration.
An interlock component prevents the arms from moving from the open configuration to the closed configuration.
Documented Applications
Bone fixation/arthrodesis system for arthrodesis (tissue fixation) and example use case described for the foot/foot joint line [as stated in provided partial content summary].
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