US Patent 7676943 Method and apparatus for using a surgical depth instrument

A method and apparatus are provided for measuring the depth of a hole with a first edge and a second edge, comprising positioning a distal end of a first member of a measuring instrument against a first surface in which the first edge is formed. Then, positioning a distal end of a second member against a second surface in which the second edge is formed, the first member and the second member being movably connected; and finally, measuring an electronic signal that represents the distance between the first member and the second member.