A mental spine is a small projection of bone on the posterior aspect of the mandible in the midline.

Mental spines are important landmarks in clinical practice.

Mental spines are found on the posterior aspect of the mandible (lower jaw bone) in the midline.

Mental spines are important landmarks for maxillofacial surgeons, dentists, and radiologists.

[3] The adjective mental in this instance is used in its "chin-related" sense (from Latin mentum) rather than its more common "mind-related" sense (from Latin mens).