At about age six most children begin to lose their baby teeth, which are then replaced with adult teeth. This process will continue into their early teens. Adult Teeth. Adults have more teeth than children; most adults have 32 teeth. Among these teeth are 8 incisors, 4 canines, 8 premolars, and 12 molars (including 4 wisdom teeth). Most people have a complete set of adult teeth by the time they reach their teenage years. It is common for adults to have their wisdom teeth removed because there is not always enough room for them to grow in comfortably or without causing misalignment of other teeth. So, how many teeth do we have? Typically, children have 20 and adults have 32 (28 if the wisdom teeth are removed). And each one of them needs your care.