Dental Materials Miscellaneous Question And Answers

Dental Materials Miscellaneous

Question 1. Describe blood supply and lymphatic drainage of the tongue.
Answer:

Muscles of the tongue:

1. Intrinsic muscle:

1. Superior longitudinal:
   1. It lies beneath the mucous membrane.
   2. It shortens the tongue and makes it dorsum concave.
2. Inferior longitudinal:
   1. It is a narrow band lying close to the inferior surface of the tongue between the genioglossus and the hyoglossus.
   2. It shortens the tongue and makes its dorsum convex.
3. Transverse:
   1. It extends from the median septum to the margins.
   2. It makes the tongue narrow and elongated.
4. Vertical:
   1. It is found at the borders of the anterior part of the tongue.
   2. It makes the tongue broad and flattened.

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2. Extrinsic muscle:

• Genioglossus – connects the tongue to the mandible
• Hyoglossus connects the tongue to the hyoid bone
• Styloglossus connects the tongue to the styloid process
• Palatoglossus – connects the tongue to the palate.

Arterial supply:

• Lingual artery – a branch of the external carotid artery
• Tonsillar branch of the facial artery
• Ascending pharyngeal branch of the external carotid.

Venous drainage:

• Deep lingual vein.
• This ends in the internal jugular vein.

Lymphatic drainage:

• Tip of the tongue – to submental nodes
• Anterior rd of the tongue – to submandibular nodes
• Posterior rd of the tongue – to jugular -omohyoid nodes
• Posterior most part – upper deep cervical lymph nodes.