Abstract: A ratcheted spinal device including a variable-length member including a ratchet mechanism that has an operative configuration that allows a change in length of the variable-length member in one direction and prevents a change in length of the variable-length member in an opposite direction, wherein the variable-length member includes polyaxial-joint attachment members for attachment to bone, which permit pivoting movement of the attachment members about more than one pivoting axis.

Abstract: A spinal device includes a rod which has a first end disposed in a housing and a second end which protrudes out of the housing through an aperture and which is movable to protrude more out of the housing or less out of the housing. A biasing device, mounted on the rod, includes a series of connected at-least partial coils. A first end of the biasing device is arranged to abut against the housing and a second end of the biasing device, opposite to the first end, is affixed to the rod.

Abstract: A spinal device includes a rod which has a first end disposed in a housing and a second end which protrudes out of the housing through an aperture and which is movable to protrude more out of the housing or less out of the housing. A biasing device, mounted on the rod, includes a series of connected at-least partial coils. A first end of the biasing device is arranged to abut against the housing and a second end of the biasing device, opposite to the first end, is affixed to the rod.

Abstract: A spinal pedicle screw system includes distractions rods and has the ability to be distracted after the screws are inserted into the pedicle and maintain polyaxial motion via polyaxial joints.

Abstract: A spinal screw includes a shaft formed with a lumen and including a head, and a distal movable member including a distal tip and arranged to move in a distal portion of the lumen. A distal movable member (18) includes a proximal surface (24) arranged to abut against a stopper (26) formed in the shaft (12).

Abstract: A ratcheted spinal device including a variable-length member including a ratchet mechanism that has an operative configuration that allows a change in length of the variable-length member in one direction and prevents a change in length of the variable-length member in an opposite direction, wherein the variable-length member includes polyaxial-joint attachment members for attachment to bone, which permit pivoting movement of the attachment members about more than one pivoting axis.

Abstract: A facet distraction prosthesis (10, 30) includes an array of facet distraction base elements (12, 32) connected to each other by one or more connector elements (14, 34). A pair of diagonally adjacent base elements (12, 32) are connected to each other by a set of or more connector elements (14, 34) which intersects with another set of one or more connector elements (14, 34) that connects another pair of diagonally adjacent base elements (12, 32). The connector elements (14, 34) are flexible so that the base elements (12, 32) can flex with respect to each other and adapt to a geometry of a facet joint.

Abstract: A spinal implant includes first and second pedicle screws, each of which comprises a threaded shank coupled to a head. First and second cantilevered arms are coupled to the first and second pedicle screws, respectively. The first cantilevered arm includes a contact member arranged to contact and move over a contact portion of the second cantilevered arm.

Abstract: A spinal device includes a rod which has a first end disposed in a housing and a second end which protrudes out of the housing through an aperture and which is movable to protrude more out of the housing or less out of the housing. A biasing device, mounted on the rod, includes a series of connected at-least partial coils. A first end of the biasing device is arranged to abut against the housing and a second end of the biasing device, opposite to the first end, is affixed to the rod.

Abstract: A bone fastener includes a tulip head including sides spaced by an opening and a lower portion below the opening and extending from the sides. The lower portion is formed with a lower central opening configured to allow a portion of a pedicle screw to pass. The lower portion is formed with at least one aperture offset sideways from the lower central opening.

Abstract: A ratcheted spinal device including a variable-length member including a ratchet mechanism that has an operative configuration that allows a change in length of the variable-length member in one direction and prevents a change in length of the variable-length member in an opposite direction, wherein the variable-length member includes polyaxial-joint attachment members for attachment to bone, which permit pivoting movement of the attachment members about more than one pivoting axis.

Abstract: A spinal implant includes first and second pedicle screws, each of which comprises a threaded shank coupled to a head. First and second cantilevered arms are coupled to the first and second pedicle screws, respectively. The first cantilevered arm includes a contact member arranged to contact and move over a contact portion of the second cantilevered arm.

Abstract: A spinal pedicle screw system includes distractions rods and has the ability to be distracted after the screws are inserted into the pedicle and maintain polyaxial motion via polyaxial joints.

Abstract: A ratcheted spinal device including a variable-length member including a ratchet mechanism that has an operative configuration that allows a change in length of the variable-length member in one direction and prevents a change in length of the variable-length member in an opposite direction, wherein the variable-length member includes polyaxial-joint attachment members for attachment to bone, which permit pivoting movement of the attachment members about more than one pivoting axis.

Abstract: A delivery device includes a guide tool and an impact tool. The guide tool includes an elongate body formed with a longitudinal guide channel, whose inner perimeter is made to complement an outer contour of an implant. The elongate body is formed with a longitudinal impact-tool channel, whose inner perimeter is made to complement an outer contour of the impact tool.

Abstract: A facet distraction prosthesis includes an array of facet distraction base elements, connected to each other by a set of connector elements located at adjacent base elements. The set of connector elements includes a male connector having an at least partial cylindrical or spherical contour that is received in, and articulates with, an at least partial cylindrical or spherical recess of a female connector, so that adjacent ones of the base elements can bend in multiple degrees of freedom about different bending axes with respect to each other and adapt to a geometry of a facet joint.

Abstract: A spinal screw includes a shaft formed with a lumen and including a head, and a distal movable member including a distal tip and arranged to move in a distal portion of the lumen. A distal movable member (18) includes a proximal surface (24) arranged to abut against a stopper (26) formed in the shaft (12).

Abstract: A spinal pedicle screw system includes distractions rods and has the ability to be distracted after the screws are inserted into the pedicle and maintain polyaxial motion via polyaxial joints.

Abstract: A ratcheted spinal device including a variable-length member including a ratchet mechanism that has an operative configuration that allows a change in length of the variable-length member in one direction and prevents a change in length of the variable-length member in an opposite direction, wherein the variable-length member includes polyaxial-joint attachment members for attachment to bone, which permit pivoting movement of the attachment members about more than one pivoting axis.

Abstract: A spinal device including a variable-length member including a ratchet mechanism that has an operative configuration that allows a change in length of the variable-length member in one direction and prevents a change in length of the variable-length member in an opposite direction, wherein the variable-length member includes polyaxial-joint attachment members for attachment to bone, which permit pivoting movement of the attachment members about more than one pivoting axis, characterized by a force applicator operative to adjust or advance the ratchet mechanism.