A DLX3 mutation has also been reported to account for amelogenesis imperfecta hypoplastic-hypomaturation with taurodontism (AIHHT; OMIM#104510; Dong et al., 2005), although it has been disputed whether the described condition really constituted AIHHT or rather TDO with only minor hair and bone involvement (Price et al., 1999). The gene discussed is DLX3; the disease is tricho-dento-osseous syndrome.