How many milk teeth are replaced by permanent teeth during the life span of an individual?

During an individual's lifespan, a total of 20 milk teeth are replaced by permanent teeth. This process typically begins around the age of 6 and continues into the early teenage years. The set of permanent teeth includes incisors, canines, premolars, and molars. By the time this transition is complete, most adults have 32 permanent teeth, including wisdom teeth.