Surgical depth instrument

A device for examination and measurement of a hole formed through a bone, the device comprising:

• a handle;
• a bone probe fixed to the handle and extending from a distal end thereof, the bone probe comprising a shaft including a distal end defining a probing tip shaped and configured to contact an interior surface of a hole formed through bone;
• a depth gauge cylinder slidably mounted to a portion of the handle, the depth gauge cylinder comprising a hollow body including a lumen in which at least a portion of the handle and the bone probe shaft are received within, wherein the depth gauge cylinder is operable to slide along a longitudinal axis of the handle;
• a tip member releasably coupled to a distal end of the depth gauge cylinder and operable to correspondingly slide with the depth gauge cylinder, the tip member comprising an opening through which at least the bone probe shaft is received, the tip member further comprising a distal end including a profile corresponding to an opening in a bone plate through which a screw is to be received;
• and
• a sensor configured to generate an electronic signal based on the distance traveled by the depth gauge cylinder relative to the handle and bone probe.