<prompt> The most common cyst of the oral region is -Dentigerous cystKeratosis cystDermoid cystPeriapical cyst  <response>: Ans. d Periapical cystRef: Scott-Browns Otorhinolaryngology 7e p 1924-1925Periapical Cyst Radicular Cyst MC type of Jaw cyst Inflammatory origin Found at the apex of teeth. Result in long standing Pulpitis. Removal of irritant material and tooth extraction. 