Patil S et al.: Erupting Permanent Second Premolar after Marsupialization of Dentigerous Cyst

Introduction: Among all the developmental cysts associated with crowns of a permanent tooth, dentigerous cysts is most common. Though usually present in 2 nd & 3 rd decade of life, are rarely seen during childhood. The dentigerous cyst is always associated initially with the crown of an impacted, embedded or unerupted tooth. This type of cyst is potentially capable of becoming an aggressive lesion which leads to bone expansion resulting in facial asymmetry & displacement of teeth, severe root resorption of adjacent teeth and pain all possible sequelae brought about by continued enlargement of the cyst. If not treated can seldom lead to relatively serious potential complications like the development of ameloblastoma or epidermoid carcinoma. Case Report: In this case report we are describing the conservative management of 8-year-old child patient with painful carious mandibular primary second molar along with extra-oral hard swelling related to affected area. Clinical and radiographic examination suggesting of large radiolucent lesion associated with a crown of the mandibular right second premolar. The treatment instituted was the extraction of grossly carious deciduous tooth followed by marsupialisation and placement of an acrylic stent. The treatment allowed rapid healing of the lesion, which facilitates eruption of succedaneous tooth without loss of neurosensory function and also pathological fracture was eluded. Though smaller lesion can be enucleated, the larger lesions which involve a serious loss of bone with the possibility of jaw fracture needs conservative management. Therefore treatment of the dentigerous cyst is usually dictated by the size of the lesion.