Retrograde drilling device
A drill assembly for creating a reverse counterbore bone tunnel while increasing bone preservation. The drill assembly including a housing having an actuation mechanism and a cannulated shaft connected to the actuation mechanism. The drill assembly also includes a rigid rod extending through the cannulated shaft. Engaging the actuation mechanism moves the cannulated shaft along the rigid rod. The drill assembly additionally includes a distal tip connected to the cannulated shaft and the rigid rod. Proximal movement of the cannulated shaft along the rigid rod causes the distal tip to rotate from a first configuration to a second configuration. In the second configuration, the distal tip extends at an angle relative to the cannulated shaft.
1. A drill assembly, comprising:
a housing having an actuation mechanism moveable between a first position and a second position,
a cannulated shaft connected to the housing;
a rigid rod extending through and slidably positioned in the cannulated shaft;
a distal tip connected to the cannulated shaft and the rigid rod and comprising a most distal pointed end; and
wherein movement of the actuation mechanism from the first position to the second position causes the distal tip to rotate, and causes exposure or concealment of a visual indicator wherein the visual indicator is positioned within the housing during concealment.
2. The drill assembly of claim 1 , wherein the most distal pointed end of the distal tip comprises at least two sides, wherein the distal tip extends proximally at an angle relative to a central longitudinal axis from each of the at least two sides of the most distal pointed end.
3. The drill assembly of claim 2 , wherein the central longitudinal axis extends through the housing.
4. The drill assembly of claim 3 , wherein in a first configuration, the distal tip extends along the central longitudinal axis.
5. The drill assembly of claim 2 , wherein the angle is 90 degrees.
6. The drill assembly of claim 1 , further comprising a locking mechanism within the housing configured to restrict distal movement of the cannulated shaft.
7. The drill assembly of claim 6 , further comprising a release mechanism on the housing configured to cause distal movement of the cannulated shaft.