Final answer:
Posterior teeth like premolars and molars are the most commonly fractured due to the large forces exerted on them during chewing and potential issues with wisdom teeth impaction.
Step-by-step explanation:
The statement Posterior teeth are the most commonly fractured is True. Because posterior teeth, which include the premolars (bicuspids) and molars, are primarily used for mashing and crushing food, they are subjected to large forces during chewing. For instance, the masseter muscle in the jaw, one of the strongest muscles for its size in the human body, exerts significant force on the back teeth. Moreover, the wisdom teeth, which are the rearmost molars, are often impacted and may cause issues that can lead to fractures due to their delayed eruption and potential misalignment in the jaw.