Tooth marks are the indentations or impressions left on a surface by teeth. Synonyms for tooth marks include bite marks, imprints, impressions, dents, scratches, grooves, and indentations. Tooth marks are commonly left on items that have been bitten or chewed, like food, gum, or pens. However, they can also be left on unintended surfaces due to nervous habits, like nail biting. In forensic investigations, tooth marks can be used as evidence to help identify a suspect or determine the type of weapon used in a crime. Whatever the reason for tooth marks, they are a distinctive and often easily recognizable pattern.