The book presents 573 scanning electron microscopic (SEM) pictures of differently designed, untreated and treated human tooth specimens of molars and incisors in magnifications of more than 50,000 times. The specimens were made from permanent sound, caries-free teeth that were extracted for orthodontic reasons. Sawing and fracture areas were prepared. Treatments were done with phosphoric acid, polyacrylic acid, EDTA, sodium hydroxide and phosphoric acid esters. Many unique pictures show the detailed structures of untreated and treated human enamel and dentin. This collection of SEM pictures might be quite unique in the world. This picture book is ideal for teaching purposes. The pictures are not discussed or interpreted, but it is only explained what is seen.