1. Clinicostatistical observations on impacted teeth and impacted supernumerary teeth in our clinic during past ten years;Nishijima;Jpn. J. Oral Maxillofac. Surg.,1981
2. Two cases with tooth impaction in the maxillary sinus;Yamamoto;Jpn. J. Oral Diag/Oral. Med.,1998
3. Abnormal dental eruption in the nasal cavity;Furuichi;Otolaryngol. Head Neck Surg.,1975
4. Eruption of a tooth into the nasal cavity: report of a case;Oka;Jpn. J. Oral Maxillofac. Surg.,1987
5. Supernumerary impacted teeth in the region of upper anterior teeth—a clinical review of the cases in out department during the past 8 years;Mimata;J. Fukuoka Dent. Coll.,1984