Trefination of the Skull

**Trefination** (from the Latin trespassare to pierce through) is a surgical operation that involves creating artificial holes in the bone for therapeutic and diagnostic purposes. Also called **bone perforation**, this is a surgical procedure that involves opening bone tissue for the purpose of diagnosis or treatment.

There are several types of trefination of body bones. Each of them is carried out for specific indications and involves a certain duration of the patient’s stay in the hospital. *The most common is