Factitious Habits / Improper Use of Teeth
Using teeth for purposes other than chewing food is known as a factitious habit (parafunction habit). Examples include biting fingernails, trimming fishing line, chewing ice or popcorn kernels, and resting the front teeth on sewing needles, bobby pins or nails. Factitious habits cause chipping or cracking of the teeth. The consequences can range from minor to severe. Factitious habits have also been associated with certain psychological disorders, in which trauma to the gums (gingiva) and other oral soft tissues resulted.