Brother and sister with Supernumerary tooth Impaction Beneath the Mandibular 2nd Premolar

Abstract

X-ray examination performed for orthodontic treatment and dental caries treatment of permanent teeth incidentally revealed a male patient and his younger sister with impacted supernumerary teeth in the premolar area.
1) In patient 1 (sister), x-ray examination at the age of 11 years and 6 months showed an impacted supernumerary tooth only in the mandibular left 2nd premolar area, but at the age of 12 years and 3months it showed another impacted supernumerary tooth in the mandibular right 2nd premolar area.
2) In patient 2 (brother), x-ray examination at the age of 12 years and 7 months showed no supernumerary tooth, but at the age of 16 years and 1 month it revealed an impacted supernumerary tooth in the mandibular left 2nd premolar area.
3) These x-ray examination findings suggest that the calcification of impacted supernumerary tooh in the premolar area can occur at the ages of 11-12 years or more.
4) Since the patients were a male child and his younger sister, the involvement of genetic factors was considered.