Patent ID: 7942668

Claim:
A method of for drilling a hole into a zygoma of a patient, the method comprising: applying a template comprising a guide sleeve to a patient; slideably inserting an extension unit into the guide sleeve; slideably inserting a first drill having a first diameter into the guide sleeve; forming an introductory hole; slideably inserting a drill guide unit into the template; slideably inserting a second drill having a second diameter smaller than the first diameter of the first drill into the drill guide unit; locating a bottom end of the introductory hole with a tip of the second drill to guide the second drill at two points using the drill guide unit and the bottom end of the introductory hole in a locating function; and forming a continuation hole into a solid part of the zygoma with the second drill until the drill penetrates the zygoma and with the continuation hole being generally coaxially aligned with the introductory hole.