Abstract
We experienced a very rare case of three supernumerary teeth in the anterior region of the maxilla and a geminated tooth concrescence of the right mandibular central incisor and a supernumerary teeth of a healthy Japanese girl aged 6 years. At the examination of the geminated tooth, the right mandibular central incisor and the supernumerary teeth has it's own pulp and root canal. After the apex of the right mandibular central incisor had been compleated, the separation of the geminated tooth was performed, and the supernumerary tooth was extracted. The right mandibular central incisor could have been vitally preserved with neither any spontaneous pain nor other symptoms. Further we performed occlusal guidance ,the oral environment could have been improved to be more healthy in function as well as aesthetically.