Keratocystic
odontogenic tumor (KCOT) is a rare, bening intraosseous tumor of odontogenic
origin with a potential of aggressive and infiltrative behavior. It shows
specific histopathological features, and has a high recurrence rate. In this report,
we present a case of 17 year old female patient with large-sized KCOT associated
with impacted third molar in the mandibular ramus region and its decompression
treatment. Decompression was applied by a customized removable appliance to
prevent the closing of the cyst cavity. On the 3rd and 6th months of the
control radiography, it was seen that the calcification foci began to be seen
and erupting the impacted teeth as a result of shrinkage of the lesion volume. After
18 months, there was a normal contrast image on the tomography and the
intraoral healing was uneventfully.Keywords: Customized
removable aparey, decompression
treatment, keratocystic odontogenic tumor.