What is the name of the diagonal radiopaque line visible at the lower part of the roots of the mandibular molars?

The diagonal radiopaque line visible at the lower part of the roots of the mandibular molars is called the internal oblique line. This anatomical feature represents the attachment of the mylohyoid muscle on the lingual aspect of the mandible and is seen radiographically as a distinct, angled line.

Understanding the internal oblique line in radiographic images is important for dental professionals, as it helps in better identifying the roots of the mandibular molars and distinguishing them from surrounding structures. This line typically appears above the roots and can assist in diagnosing conditions related to the area, such as infections or bone loss.

Recognizing this feature is essential for interpreting dental radiographs accurately and can inform treatment planning, particularly in procedures involving the mandibular region.