Gross anatomy of oral cavity

Question 1

2 Regions of oral cavity

Answer 1

1. oral vestibule

2. oral cavity proper

Question 2

Vascular supply on teeth

Answer 2

Common carotid artery -> external carotid artery -> maxillary artery -> superior/inferior alveolar artery

Question 3

Which area does the internal carotid artery supply?

Answer 3

Brain and skull

Question 4

What are the nerves supplying different teeth? Which regions do they supply?

Answer 4

1. Anterior superior alveolar nerve - 13 to 23
2. middle superior alveolar nerve - maxillary premolars (14,15,24,25)
3. Posterior superior alveolar nerve - maxillary molars
4. Main trunk of inferior alveolar nerve - 35-38, 45-48 (posterior)
5. Incisive branch of inferior alveolar nerve - 34-44 (anterior)

Question 5

Nerves supplying gingiva

Answer 5

Maxillary:
- anterior/middle/posterior superior alveolar nerve (buccal)
- nasopalatine nerve (anterior palatal)
- greater palatine nerve
(posterior palatal)

Mandibular:

• mental nerve from inferior alveolar nerve (labial)
• buccal nerve (buccal)
• lingual nerve (lingual)

Question 6

5 Muscles of soft palate

Answer 6

1. Musculus uvulae
2. Tensor veli palatini
3. Levator veli palatini
4. Palatopharyngeus
5. Palatoglossus

Question 7

What is the oral cavity bounded by posteriorly?

Answer 7

Oropharyngeal isthmus

Question 8

What is the name of the fibrous connective tissue that provides attachment for various soft palate muscles?

Answer 8

Palatine aponeurosis

Question 9

What is the tongue divided into left & right half by?

Answer 9

Median sagittal septum

Question 10

4 Intrinsic muscles of tongue

Answer 10

1. Superior longitudinal
2. Inferior longitudinal
3. Transverse
4. Verticalis

Question 11

4 Extrinsic muscles of tongue and their innervation

Answer 11

1. Genioglossus - CNXII
2. Hyoglossus - CNXII
3. Styloglossus - CNXII
4. Palatoglossus - CNX, XI

Question 12

Vascular supply of tongue

Answer 12

Common carotid artery -> lingual artery

Lingual vein -> internal jugular vein