[Skin and teeth].

Skin and teeth not only share several characteristics in their development but also have a similar ontogenetic origin from the ectoderm. Thus, numerous congenital diseases, such as genetic, infectious, inflammatory, and immune disorders affect both skin and teeth. Particularly skin diseases are often identified by the synopsis of systemic symptoms. The understanding and appreciation of dental abnormalities guides dermatologists in the diagnosis and identification of syndromes as well as in finding an optimal therapy.