Langerhans cell histiocytosis: impact on the permanent dentition after an 8-year follow-up.

Langerhans cell histiocytosis (LCH) is a rare disorder which mainly affects children. Oral changes, such as gingival ulceration, halitosis, osseous lesions associated with tooth mobility, and early loss of primary teeth, comprise the disease's first manifestations for most patients. In the long term, dental changes may occur as a result of dental and systemic treatment. Therefore, this study's purpose is to report Langerhans cell histiocytosis' effects on the permanent dentition 8 years after diagnosis, which had been established by performing a biopsy of gingival tissue on a 3-year-old patient.