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 16-month-old spayed female Burmese was referred, because, since it was a kitten, its jaws would frequently lock closed while eating. The cat was fed both dry kibble and canned food. Bilateral supernumerary maxillary fourth premolar teeth, palatal to the normal maxillary fourth premolar teeth (), had resulted in a bilateral class one malocclusion. Buccoversion of both mandibular molar teeth had occurred (), with these teeth occluding laterally with the maxillary fourth premolar teeth (). Supernumerary maxillary third incisor teeth were also diagnosed (). These teeth were not causing crowding and were deemed to be stable; therefore, they were not extracted. In order to relieve the jaw locking, both supernumerary maxillary fourth premolar teeth and both mandibular molar teeth were extracted using the open extraction technique. At the follow-up examination the owner stated that the cat’s jaws no longer locked while eating.