Device for advancing a functional element through tissue

A device for therapeutically treating bone, comprising:

• a) a housing having a base portion, a distal face and a first passage opening onto the distal face and forming a longitudinal axis,
• b) a probe adapted to advance through the first passage along the longitudinal axis, the probe having a functional element thereon, the probe having a distal end portion having a sharp tip shaped to pierce cortical bone,
• c) an advancement mechanism adapted to advance the probe through the first passage, and
• d) an anchor rotatably attached to the distal face of the housing and adapted to provide rotation of the housing about the longitudinal axis, wherein the anchor comprises:
• a plate comprising:
• i) a proximal face,
• ii) a distal face,
• iii) a first throughhole extending from the proximal face to the distal face, wherein at least a portion of the throughhole forms a portion of a substantially spherical recess, and
• iv) a second different throughhole extending from the proximal face to the substantially spherical recess, wherein the throughholes have separate proximal openings,
• a bearing comprising:
• i) a substantially spherical portion disposed in the substantially spherical recess;
• and
• a lock screw inserted into the second throughhole of the plate and fixing the orientation of the bearing.