Method and apparatus for forming a bone hole

摘要

A method and tool for creating a location for a fixation device to be secured to a bone. The method includes bringing a bone cutting tool extending along a longitudinal axis into engagement with an outer surface of the bone. The bone cutting tool is rotated about the longitudinal axis while driving it from the outer surface of the bone to a predetermined depth in the bone to form a bore. The bone cutting tool is then continuously rotated at the predetermined depth to establish an enlarged bone pocket at a distal end of the bore. The bone pocket defines a shoulder extending around a circumference between the bone pocket and bore. The bone cutting tool is removed from the bone pocket and bore. The fixation device is then inserted into the bone pocket through the bore, where it is seated against the bone pocket shoulder.

主权项

1. A method for attaching a fixation device to a bone, the method comprising:
bringing a bone cutting tool into engagement with an outer surface of the bone, the cutting tool having a body portion and a drilling portion, the body portion having a constant first diameter, a proximal end and a distal end, the drilling portion having a second diameter larger than the first diameter and terminating at a drill tip, the body portion extending along a longitudinal axis; rotating the bone cutting tool about the longitudinal axis while driving the bone cutting tool from the outer surface of the bone to a predetermined depth in the bone to form a bore; slidingly engaging the body portion of the bone cutting tool with a sleeve at a first position near the proximal end of the body portion to form the bore, the sleeve having an inner diameter smaller than the second diameter; moving the sleeve to a second position toward the distal end of the body portion and against the drilling portion; continuously rotating the bone cutting tool at the predetermined depth to establish an enlarged bone pocket at a distal end of the bore while the sleeve is in the second position, the bone pocket defining a shoulder extending around a circumference between the bone pocket and the bore; removing the bone cutting tool from the bone pocket and the bore; inserting the fixation device into the bone pocket through the bore; and positioning the fixation device against the shoulder of the bone pocket.