This section is from the book "Dental Medicine. A Manual Of Dental Materia Medica And Therapeutics", by Ferdinand J. S. Gorgas. Also available from Amazon: Dental Medicine.
An Unerupted Impacted Tooth is indicated by a hard, bony tumor on the alveolar ridge, sometimes extending along the surface of the palate bone, or the body of the maxilla, and in form corresponding to a tooth, the absence of which is noted.
Extraction, by first making an incision through the mucous membrane, and then exposing the tooth by the removal of its bony capsule.