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This is my 8.9 cm. (3.5 in.) Spinosaurus tooth, which actually is in surprisingly great shape! (apart from cracks caused by clumsy past owners) However, it is curved (~0.5cm in one direction, and ~0.4 cm off to the side of the previous curve). This leaves me to wonder- how did this happen? My theory is that this Spinosaur either had something HUGE stuck between its teeth that caused them to deform as it grew older; or that a sideways tooth interfered with the normal growth of this tooth, and caused it to grow sideways (to make room for the wayside tooth). The latter is actually very common in humans! (This is why many of us as teenagers had braces, as to prevent our teeth from growing in every direction). I also prefer the last argument (I know, I argue with my self, haha...) because there is a long 3 cm indentation along the side of the tooth, which is exactly where the tooth would have interfered with the room of another tooth. The indentation is likely the blade end of another tooth which was in place when the dinosaur was still alive. The mark is visible on the right side of the tooth in the last image. I just that this was a very unique specimen that I wanted to share with the world, especially because mine is in such good shape for a tooth with almost 6 cm of intact tip enamel, and another three centimeters of root. Does anyone else have some pathological (deformed) fossil teeth they would like to share? Sounds cool! -Fossil sniper