Dissection of oral region

Oral cavity opened; nerves to mylohyoid and digastric muscles, left lateral view

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Image #69-5
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Dissection of oral region
Oral cavity opened; nerves to mylohyoid and digastric muscles, left lateral view
The left half of the mandible has been removed, and the lower lip and much of the cheek resected. The mylohyoid muscle lies approximately in its normal position. The anterior belly of the digastric muscle has been turned inferiorly and opened to expose its nerve and arterial supply.
1 . Labial glands
2 . Medial incisor (sectioned vertically, pointer on pulp cavity)
3 . Plica fimbriata
4 . Orbicularis oris muscle (sectioned)
5 . Sublingual fold
6 . Sublingual gland
7 . Mandible
8 . Tendon of geniohyoid muscle
9 . Anterior belly digastric muscle
10 . Buccinator muscle
11 . Parotid duct (at entrance to oral cavity)
12 . Buccal mucosa
13 . Lingual nerve (note close relation to buccal wall and tongue)
14 . Tongue
15 . Mylohyoid muscle
16 . Upper pointer: Submental artery Lower pointer: Mylohyoid nerve
17 . Thyrohyoid muscle (cut across)
18 . Thyroid cartilage