Although muscle attachment points are conservative in living vertebrates,
their positions and capabilities can vary because their lines of
action change as the shapes, proportions, and
orientations of the bones are modified in different groups of vertebrates.
The jaw muscles of Tyrannosaurus, for example, are relatively short and
broad, and attach to the lower jaw in a way to maximize the power of the bite.
Tyrannosaurus were capable of biting right through the bones of their prey.
This Triceratops ilium and hip basically provides
a graphic example showing how strong the jaws of Tyrannosaurus Rex were.
These jagged breaks here, were caused when the teeth and jaws of
Tyrannosaurus bit right through the bone and took that part of the bone away.
These holes are places where the jaws drove the teeth into the bone,
but they didn't break the bone, they pulled the teeth out again.
This particular tooth hole is so
deep that if you pour rubber into it and pull out the rubber after it's dried,
you get a perfect replica of a Tyrannosaurus Rex tooth.