Case 1. A female, leucoderma, Brazilian patient, aged 7 years and 3 months, presenting mouth breathing and skeletal Class II, division 2 malocclusion, sought a private clinic for orthodontic treatment. The initial panoramic radiograph revealed no abnormalities in the dentition ().\nOrthodontic treatment started two years later, when the patient was aged 9 years and 4 months. The corrective phase of the treatment occurred after the interceptive phase. For the treatment of the Class II malocclusion, an orthopedic expansion device across the upper and lower arches was placed over a period of 12 months. After this period, a lingual bar was adapted, and a follow-up radiograph was required because tooth 84 exhibited no physiological mobility and was the last deciduous teeth to remain in the oral cavity. Control radiographs obtained at 31 and 38 months after the first initial radiographic assessment revealed the early formation of a supernumerary tooth in the right mandibular premolar region (Figures and ). There were no reports of supernumerary teeth in the family. Due to its location, surgical removal was indicated.\nBefore beginning the second phase of the treatment, additional tests and a new panoramic radiograph were requested, which revealed the formation of a supplemental supernumerary tooth, this time in the left mandibular premolar region (), which was also surgically removed.\nControl panoramic radiographs taken at two different moments along the orthodontic treatment demonstrated no evidence of further supernumerary teeth ().
A 6-year-old castrated male Burmese was presented as the referring veterinarian had noted supernumerary teeth on oral examination. On referral, SN 108, SN 308 and SN 408 were confirmed. The SN 408 was shown to have a supernumerary third root on radiographs. The supernumerary root was slender and situated between the mesial and distal roots (). The SN 108 was positioned palatal to the normal 108 () and the SN 308 and SN 408 were positioned lingual to the normal mandibular fourth premolar and molar teeth, causing moderate rotation of the adjacent normal mandibular teeth; 108, 109, SN 108, SN 308 and SN 408 were affected by PD3. Closed extraction was performed at 109. The open extraction technique was used for the extraction of SN 108, SN 308, SN 408 and 108.