Abstract
Trisomy 13 syndrome is an autosomal genetic disease caused by an extra chromosome 13 and 95% of affected individuals die within 1 year after birth. Due to the low survival rate, reports of oral findings in such patients are rare. Here, we present oral findings of a 14-year-old female who was diagnosed with partial trisomy 13 at a heredity clinic in a prefectural children's hospital at the age of 10 years. Her initial visit to our hospital was for displacement of the left upper canine. An oral examination revealed that the third molars were missing, the upper canines were displaced, and the tooth crowns had a large mesiodistal width, while a bilateral crossbite in the molar region was noted. Large amounts of dental calculus and severe gingivitis were also observed. We corrected malalignment and treated the dental caries, after which the patient entered a preventive program and for follow-up examinations every 2-5 months after treatment.
