1. Impaction of tooth;Pindborg,1970
2. Unerupted second primary molar;Amir;J Dent Child,1982
3. Inherited primary failure of eruption in the primary dentition: report of five cases;Rasmussen;J Dent Child,1997
4. Surgical exposure and orthodontic alignment of an unerupted primary maxillary second molar impacted by an odontoma and a dentigerous cyst: a case report;Motokawa;Quintessence Int,1990
5. A review of clinical features in 13 cases of impacted primary teeth;Otsuka;Int J Paediatr Dent,2001