Several online sources note that he tooth fairy is a relatively recent creation, but like other myths, evolved over time.
Early Norse and European traditions suggest that when a child lost a baby tooth, it was buried to spare the child from hardships in the next life. A tradition of the tooth fee originated in Europe for a child’s first tooth, and Vikings used children’s teeth and other items from their children to bring them good luck in battle.
There’s also the more general tradition of a good fairy in Europe that was birthed out of fairy tales and popular literature in more recent times. Ultimately the most popular version of a ‘tooth deity’ is the image of a mouse, who would enter children’s rooms and remove baby teeth. This tradition is prominent in Russia, Spain and many Asian countries. More recently, when the 6th tooth fell out, the child was rewarded with a gift in many northern European countries. The reason for the mouse being synonymous with so many culture’s tooth fairy tradition is the fact that rodents continue to grow their teeth their entire lives.The tooth fairy in the U.S. was inspired by the legend of the mouse mentioned earlier and the good fairy myth. In 1927 or so, a book popularized what would consider to be the modern tooth fairy. The legend was obscure for a while, but with the popularity of Walt Disney’s fairy characters, the tooth fairy gained popularity and quickly became a presence in most households.
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