Incisors are the front teeth in humans and many other mammals. They are typically flat and sharp, designed for cutting food. Adults usually have eight incisors, four on the top and four on the bottom. These teeth play a crucial role in biting into food, making them essential for eating. Each incisor has a single root that anchors it to the jawbone. They are the first teeth to emerge in children, usually appearing around six months of age. Proper care of incisors is important, as they can be prone to cavities and other dental issues if not maintained through regular brushing and dental check-ups.