Which of the following instruments is called a depth gauge?

The instrument referred to as a depth gauge is commonly used in surgical procedures to measure the depth of a bone or other anatomical structure accurately. A depth gauge allows veterinary professionals to determine the appropriate depth for drills or other surgical interventions, ensuring precision and reducing the risk of complications during surgery.

The bone scribe is often used to create marks on the bone surfaces, helping guide the placement of implants or other devices during procedures. However, its primary function is not to measure depth but to indicate precise locations on the bone.

In contrast, a drill guide helps in accurately directing the path of a drill during orthopedic surgeries, aligning it according to the required angle and position but does not specifically measure depth itself.

The TECA retractor and Smith-Kerrison punch forceps serve different purposes entirely, focusing on tissue retraction and bone removal, respectively.

Thus, the bone scribe is identified as the correct answer related to measuring depth due to its specific function in surgical procedures.