Bone material removal device and a method for use thereof

A method of drilling a varying diameter bore, comprising:

• providing a tubular element having a proximal end and a distal end;
• providing a bone material removal device having a longitudinal axis and comprising a shaft having a drilling tip and a selectably openable cutting tooth at a first end of said bone material removal device, wherein said bone material removal device is coupled to an actuator at said tubular element proximal end, wherein said actuator comprises a rotatable coupling comprising at least one slot in a wall of said tubular element proximal end;
• forming an initial bore in a bone of a patient while pushing said drilling tip into a bone of a patient in a distal direction and rotating the bone material removal device in a first rotational drilling direction;
• rotating said actuator in a first rotational actuating direction thus bringing said cutting tooth from a closed retracted position to an open position;
• reversing the drilling rotational direction to a second rotational drilling direction;
• and
• forming an undercut bore in said bone by said cutting tooth, while pulling the bone material removal device in a proximal direction and continuing rotating the bone material removal device in said second rotational drilling direction.