Abstract :The purpose of this case reports are to report two dentigerous cysts and spontenous eruption of teeth after marsupyalization on a 9 and 12 years old boys. The children were referred to Cumhuriyet University Department of Pediatric Dentistry with the complaint of a swelling on the jaws. After intra oral and radiographical examination, dentigerous cysts were diagnosed. In cases of this type of dental cysts it is possible to achieve spontaneus eruption of the involved permanent teeth into the dental arch even if they are badly dislocated. Simultaneous with eruption of the permanent teeth, ossification of bone defect can take place. In these case reports after 25 months of follow up spontaenous eruptions of permanent teeth were noticed.