When you look in the mirror, you most likely see two rows of smooth, rectangular teeth. Although your permanent teeth probably didn't come in for a number of years, they began developing before you were born. According to the Dental Health Foundation, permanent teeth begin to develop when a fetus is about 20 weeks old. Many people hope for smooth, even teeth, but the complexity of the tooth development process means that anomalies sometimes develop.
A talon cusp is an example of a rare dental anomaly. It develops before the teeth have calcified, usually because of evagination, a process during which the developing tooth develops an outgrowth on the tongue side of the tooth, according to an article in BMJ Case Reports. The cusp gets its name because of its shape: It looks like a talon or eagle's claw sticking out of the crown of the tooth. Is a talon cusp something you should be concerned about? Learn more about how common this condition is and what you can do about it.