3 results about "Cannulated screw" patented technology

A polyaxial pedicle screw assembly including a receiver having a channel for receiving a rod and a central bore with a seating surface proximate a bottom opening. The assembly also includes a screw shank having a shank head at a proximal end and an anchor portion at a distal end configured for fixation to the bone, with the shank head having an outer spherical surface with a single common radius and an annular planar top end surface entirely surrounding an internal drive socket formed into a top end of the shank head. The assembly further includes an insert having a lower surface and an upper surface. The lower surface is configured for engaging the outer spherical surface of the shank head to apply frictional force to the screw shank head. The upper surface is configured to be positioned under a downward facing surface in the central bore of the receiver.

An intelligent medical device includes a structure configured to be at least partially implanted in a body, and an electronics cartridge configured to be inserted into the structure after implanting the structure in the body. The structure can be a cannulated screw for treating a bone fracture. The medical device includes an impedance sensor for monitoring and reporting the status of the bone fracture healing. The sensor includes an electronics cartridge assembly and an electrode associated with the cannulated screw or with the insertable electronics cartridge.

Hollow screw,- with a shaft (2) having an external thread (6) on the outside and a cavity (7) on the inside,- with a head (3) arranged at a first longitudinal end (8) of the shaft (2) and having a torque introduction contour (9),- with a throttling element (4) for throttling a flow through the cavity (7) with a fluid,- wherein the shaft (2) has an axial opening (15) at its second longitudinal end (14) which is fluidically connected to the cavity (7),- wherein the shaft (2) has at least one radial opening (16) axially spaced from its second longitudinal end (14) which is fluidically connected to the cavity (7),- wherein the throttling element (4) is adjustable relative to the shaft (2) between a first throttling position (DSI) and a second throttling position (DSII), which differ from each other by different throttling effects,- wherein the throttle element (4) is arranged linearly adjustably on or in the shaft (2) along a longitudinal central axis (5) of the shaft (2), characterized in that the throttle element (4) is arranged linearly adjustably on or in the shaft (2) such that in the first throttle position (DSI) the throttle element (4) is arranged in the cavity (7) or directly at the axial opening (15), while in the second throttle position (DSII) the throttle element (4) is arranged outside the cavity (7) and axially spaced from the axial opening (15).