Final answer:
The last primary tooth is generally shed by the age of 12 or 13 after the incisors, premolars, and canines have been replaced by permanent teeth in middle childhood.
Step-by-step explanation:
The last primary tooth is typically shed during middle childhood. The deciduous teeth, also known as baby teeth, are gradually replaced by permanent teeth. The first to fall out are usually the eight incisors, which occurs between the ages of six and eight.
The incisors are followed by the shedding of the eight premolars, generally between the ages of nine and 12, and the four canines, typically lost between the ages of ten and 13. By the age of 12, most children have lost all their primary teeth and have their adult teeth, with the exception of the wisdom teeth (third molars) which emerge later. It's important to note that there can be individual variation in the timing of these events.
Thus, the last primary tooth is commonly shed by the age of 12 or 13, marking the end of a significant period of dental development.