The odontoma is a hamartoma

Hamartoma

A hamartoma is a benign, focal malformation that resembles a neoplasm in the tissue of its origin. This is not a malignant tumor, and it grows at the same rate as the surrounding tissues. It is composed of tissue elements normally found at that site, but which are growing in a disorganized mass...

 of odontogenic origin.

The average age of people found with an odontoma is 14, and the condition is frequently associated with an unerupted tooth

Tooth

Teeth are small, calcified, whitish structures found in the jaws of many vertebrates that are used to break down food. Some animals, particularly carnivores, also use teeth for hunting or for defensive purposes. The roots of teeth are embedded in the Mandible bone or the Maxillary bone and are...

.

In 2011; 66% of odontogenic tumors are odontomas (University of Louisville School of Dentistry).
22% of odontogenic tumors are odontomas.

Classification

There are two types: compound and complex.

• A compound odontoma still has the three separate dental tissues (enamel, dentin and cementum), but may present a lobulated appearance where there is no definitive demarcation of separate tissues between the individual "toothlets". It usually appears in the anterior maxilla
  Maxilla
  The maxilla is a fusion of two bones along the palatal fissure that form the upper jaw. This is similar to the mandible , which is also a fusion of two halves at the mental symphysis. Sometimes The maxilla (plural: maxillae) is a fusion of two bones along the palatal fissure that form the upper...
  
  .

• The complex type is unrecognizable as dental tissues, usually presenting as a radioopaque area with varying densities. It usually appears in the posterior maxilla or in the mandible.

For removal of both compound and complex odontoma, you will need to go to an oral surgeon. This procedure could take 1 to 2 hours long. Generally, it takes an hour. But for time in the recovery room, it takes however long you need to wake up from the anesthesia.