Wisdom teeth are type of vestigial structure. Vestigial structure is a type of anatomic structure which is a part of the body having no use or function. At some point of time these parts may be used to our body but now they have no purpose.
Wisdom teeth are vestigial structure because they provides no main function to human body. Removal of wisdom teeth are not concerning. Many times it is necessary to remove wisdom teeth as they may grown in wrong order or causing irritation to gums or mouth. Sometimes they grow too big which causes problem to mouth.
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