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.
A 15-year-old male patient (III-1) from Shanghai visited the department of pedodontics of the Affiliated Stomatology Hospital of Tongji University with a chief complaint of pain in the right posterior mandibular region. The patient's medical and family histories were inconclusive. Patients from this family have had a family history of Gardner syndrome.