Apicoectomy on an incisor tooth of a Victorian koala (Phascolarctos cinereus victor).

An eight-year-old Victorian koala was presented with a discharging mandibular sinus of at least one month duration. On examination, a dental abscess of the right mandibular incisor tooth was found. During the course of endodontic treatment, a size 2 Gates Glidden bur separated from the shank and was lodged in the canal. Due to the anatomy of the tooth the bur could not be removed and an apicoectomy was performed. Following the apicoectomy (follow-up period two years), the periapical pathology resolved.