Mylohyoid line

Mylohyoid line is a bony ridge located on the inner surface of the mandible, or lower jawbone. It serves as the attachment point for the mylohyoid muscle, which forms the floor of the mouth and aids in swallowing.

Etymology

The term "mylohyoid" is derived from the Greek words "mylo," meaning mill, and "hyoid," referring to the shape of the hyoid bone. The "line" in "mylohyoid line" refers to the linear shape of this bony ridge.

Anatomy

The mylohyoid line begins near the mandibular symphysis, the line of fusion in the middle of the lower jawbone. It runs diagonally upward and backward on the inner surface of the mandible, ending near the last molar tooth. The mylohyoid line is more prominent in males than in females.

The mylohyoid line serves as the attachment point for the mylohyoid muscle. This muscle forms the floor of the mouth and plays a crucial role in swallowing by elevating the hyoid bone and the tongue.

Clinical significance

The mylohyoid line's location and its relationship with the mylohyoid muscle make it significant in various dental and surgical procedures. For instance, the mylohyoid line can be a landmark during the removal of submandibular salivary gland stones or during the placement of dental implants.

Related terms

• Mylohyoid muscle: The muscle that attaches to the mylohyoid line and forms the floor of the mouth.
• Mandible: The lower jawbone, which houses the mylohyoid line.
• Mandibular symphysis: The line of fusion in the middle of the lower jawbone, where the mylohyoid line begins.
• Hyoid bone: The bone that is elevated by the mylohyoid muscle during swallowing.

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Mylohyoid line

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  Gray's Anatomy illustration of the mylohyoid line
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  Histological slide showing the mylohyoid line