Mylohyoid line

The mylohyoid line is a ridge on the internal surface of the body of the mandible. The mylohyoid line extends posterosuperiorly. The mylohyoid line continues as the mylohyoid groove on the internal surface of the ramus. The mylohyoid line is the location of the origin of the mylohyoid muscle. 
The mylohyoid muscle originates from the anterior (front) part of the mylohyoid line, while the posterior (back) part of this line, near the alveolar margin, gives attachment to a small part of the constrictor pharyngis superior, and to the pterygomandibular raphe.