Chimpanzees

Chimps have a dentition comparable to humans in that they have the same number of teeth, the same location and kind of teeth, and the same pattern of having baby teeth that fall out to make way for permanent adult teeth. Chimpanzees, like us, grin to express a wide variety of emotions, from fear to enjoyment. Of course, there are certain distinctions between a chimp's and a human's grin.

For one thing, chimpanzees (and other primates) are more likely to grin while threatening or showing danger. This might be because their canines are significantly bigger. However, there are more parallels than differences, particularly when it comes to the upkeep of these adorable beasts' grins. Chimpanzees maintain their dazzling whites using instruments that keep them healthy and clean. Chimps have been spotted brushing their teeth and picking food from between their teeth using adapted sticks.