Bicakci, Ali AltugDoruk, CenkBabacan, Hasan2019-07-272019-07-282019-07-272019-07-2820122234-7518https://dx.doi.org/10.4041/kjod.2012.42.2.94https://hdl.handle.net/20.500.12418/9181In this report, we present the case of a girl with delayed odontogenesis of a lower second premolar for which she was followed up for 8.5 years. Congenital absence of permanent mandibular second premolars was observed at the initial radiographic examination at 8 years and 1 month. One year later, during the treatment period, an unexpected odontogenesis of a right second premolar was diagnosed on follow-up radiography. The original treatment plan was revised and a new plan was successfully implemented. This unusual case showed that the orthodontist's clinical philosophy must be flexible because unexpected situations can arise, especially when treating growing patients. [Korean J Orthod 2012;42(2):94-98]en10.4041/kjod.2012.42.2.94info:eu-repo/semantics/openAccessAgenesisDentofacial anomaliesDiagnosis and treatment planningPediatric dentistryArticle4229894231129382-s2.0-84860362636N/AWOS:000303558200007Q4