The anterior teeth are the teeth that are most visible when a person smiles. Deciduous teeth are those that are commonly referred to as baby or temporary teeth. The typical deciduous arch contains 20 teeth. Anterior teeth include the central and lateral incisors and the canine teeth. They make up the six upper and six lower front teeth. The anterior teeth are the teeth that are most visible when a person smiles, and they are also among the first baby teeth to be lost and replaced by permanent adult teeth.