oral cavity and submandibular gland

Question 1

borders of oral cavity

Answer 1

roof
-hard and soft plate

floor

• muscular diaphragm
• tongue

lateral walls

- fascia
- layer of skeletal muscle

anterior
-oral fissure

posterior
-oropharyngeal isthmus (pharynx)

Question 2

layers before submandibular gland

Answer 2

1. skin
2. subcutaneous fat
3. platysma
4. investing layer of deep cervical fascia

Question 3

3 nerves at risk during submandibular excision

Answer 3

marginal mandibular branch of facial nerve

lingual nerve

hypoglossal nerve

Question 4

3 muscles closely related to submandibular gland

Answer 4

mylohyoid

hypoglossus

posterior belly of diagastric

Question 5

where would you site an incision of the submandibular gland excision and why?

Answer 5

4cm below and parallel to the lower border of the mandibular to avoid injury to the marginal mandibular branch of the facial nerve

Question 6

what structures run across the submandibular gland

Answer 6

facial artery (arches over it and grooves in posterior)

facial vein (lie of surface of gland)

lymph nodes (may adhere to surface of gland)

Question 7

course of submandibular duct

Answer 7

also referred to as whartons duct

originates from the superior par, although it emerges from the deep part
terminates at the sublingual papilla next to the base of the frenulum of the tongue