Final answer:
The advanced bone loss in his jawbones suggests he lived for several years without teeth, as lack of stimulation from chewing can cause the jaw to weaken and deteriorate.
Step-by-step explanation:
Because his jawbones show advanced bone loss, it seems that he lived for several years without teeth. Bone loss in the jaw can occur due to various reasons, including the lack of stimulation that the bones would normally receive from the forces of chewing. When teeth are missing, the jawbones do not receive the necessary signals to maintain bone density and volume. This is similar to how bones may become weaker and thinner under conditions such as prolonged immobilization, extended stays in a hospital, or even during exposure to the weightlessness of space. Specifically, in the jaw, a diet consisting of only soft food due to tooth loss can also lead to a decrease in the size and thickness of the jaw bones, demonstrating how our skeletal system responds to mechanical use and stress.