Structure of teeth is similar in all the vertebrates. A typical mammalian tooth is differentiated into 3 parts- crown, neck and root. Crown is the visible part of the tooth projecting out from the gum and out of the jaw bone. Root is the basal part, embedded in a socket or alveolus of the jaw bone. The junction of crown [...]
During Mesozoic era, the age of reptiles (dinosaurs), mammals were small, generalised and rare. By the end of Mesozoic or beginning of Coenozoic, the dinosaurs vanished and mammals suddenly expanded into varied evolutionary patterns. Early in Cretaceous period, placental mammals became distinct from marsupials. During Eocene and Oligocene, most of the orders of mammals originated moving into habitats and ecological [...]
The following points highlight the three main types of teeth found in mammals. The types are: 1. Incisors 2. Canines 3. Cheek Teeth (Premolars and Molars). Type # 1. Incisors: These are the front teeth borne by the premaxillae in upper jaw and tips of dentaris in lower jaw They are single-rooted, monocuspid and long, curved and sharp-edged. They are [...]