What common positioning landmark is located on the anterior,lower margin of the mandible?

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The mental protuberance is a bony prominence located on the anterior, lower margin of the mandible. It serves as a common positioning landmark for various dental and medical procedures. The gonion is a bony prominence at the angle of the mandible, the glabella is a smooth area between the eyebrows, and the mental foramen is a small opening on the anterior surface of the mandible.

What Common Positioning Landmark Is Located on the Anterior,lower Margin