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Flashcards in oral cavity Deck (22)
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1
Q

Borders of the oral vestibule

A

Ant: Lips which makes up the Rima oris
Post: Teeth and alviolar processes covered by Giniva
Lat: Cheeks

2
Q

Giniva

A

Gums: the mucous layer or membrane which covers the alivolar processes and is firmly attached to the bone
- it reflects onto the lips and cheeks making up the fornix

3
Q

fornix

A

movable mucous membrane

4
Q

connection of the oral vestibule

A
  • upper lip is connected to nasal cavity via Nasolabial folds and philtrum
  • lower lip connects to chin at mentolabial fold
  • connect to eachother laterally
  • ducts of small salivarygland open into vestibule
  • Connection between oral vestibule and oral cavity proper behind the 3d Molars when mouth is closed
5
Q

which structures can be identified in the oral vestibule

A
  • Maxillary/mandibular alviolar processes
  • Frenulum of lover and upper lip
  • intadental gingiva
  • Fornix
6
Q

Borders of oral cavity proper

A

-Laterally and anteriorly: Teeth, alviolarprocesses+gingiva
-Post: Isthmus of faucet
-Roof: -hart and soft palate
-Floor: Oral diaphragm
(-The 2 geniohyoid muscles lies on top of the oral diaphragm and is also considered part of the floor)

7
Q
  • What separates the oral cavity from the nasal cavity?

- Where does the parotid duct open ?

A
  • The palate

- parotid pappilla in back of oral cavity.

8
Q

What makes up the oral diaphragm?

A

-Mylohyoid muscle + the rape

9
Q

Give the borders of the Isthmus of faucet

A

Sup: soft palate
Inf: root of tongue
Lat: Palatoglossal and palatopharyngeal arches
(ant and post: palatine arches + muscles of same name)

10
Q

Parts of the tongue

A
  • Apex
  • Base
  • Root
  • Body
  • Dorum
  • Inferior surface
11
Q

Divisions of the anterior surface of the tongue

A

-Pars pappillaris: ant. 2/3s of the tongue In oral cavity =>presulcal part
contains all papillae and has a median sulcus which divides into R&L.
-Pars follicularis: post. 1/3d of tongue in oropharynx. =>postulcal part. contains lingual tonsil, see loads of lingual follicles (lymphoid nodules)
-Terminal sulcus: divides into pre and post sulcal
V-shapes line of circumvallate papillae with the foramen cecum in middle.
-

12
Q

Which structures can you find on the inferior surface of the tongue?

A
  • Frenulum of tongue
  • Fimbriated folds-> conceals sublingual glands
  • Lingual vein just below fimb. folds
  • Sublingual folds with..
  • .. sublingual caruncle: opening of sublingual and sub mandibular glands
  • A submucosal elevation caused by a small sublingial gland on each side at the apex
13
Q

Borders of Lateral lingual groove

A

Borders:

medial: hypoglossus
lateral: mylohyoid muscle
superior: sublingual mucous membrane

14
Q

Content of lateral lingual groove

A
  • Lingual n
  • Hypoglossal n (more posteriorly)
  • submandibular duct
  • (sublingual duct?)
  • Sublingual gland (only anteriorly)
  • (+ lingual vein?)
15
Q

Medial lingual groove

A
Borders: 
Medial: Genioglossus mucle
Lateral: Hyoglosus muscle
Content:
-Lingual a.
-Glossopharyngeal n (not totally)
16
Q

Pirogoffs trigone

A
-Lies in submandubular triangle
Borders:
Sup: hypoglossal n
Ant: Post. margin of mylohyoid muscle
Post: Stylohyoid/post. belly of digastric m
17
Q

Beclards trigone

A

-Lies in Submental triangle of neck
Borders:
-Superior: Tendon of post belly of digastric
-Inferior: Greater horn of hyoid bone
Posterior: Free margin of Hyoglosu Muscle

18
Q

Which are the intrinsic muscle of the tongue?

A
  • Superior longitudinal
  • Transversus
  • Verticalis
  • Inferior longitudinal
19
Q

which are the extrinsic muscles of the tongue

A
  • Genioglossus
  • Hyoglossus
  • Styloglossus
  • Palatoglossus
20
Q

innervation of the muscles of the tongue

A

They’re all innervated by Hypoglossal nerve, except for Palatoglossus which is innervated by the pharyngeal plexus.

21
Q

Genioglossus:

A
  • From mental spine of mandible, (from the superior genial tubercles of the mental symphysis)
  • Fans out :
    (a) Lowest fibres are attached to the body of hyoid bone;

(b) Intermediate fibres pass deep to the hyoglossus and are continuous with the middle constrictor muscle of pharynx;
(c) Upper fibres turn forward and upward and are inserted into the tongue extending from the root to its apex.

Function: Move tongue forward => protraction by inf. fibers + Depression by anterior fibers.

22
Q

Hyoglossus

A

-From greater horn of hyoid bone
to lateral side and inferior surface of the tongue.

Function: Depreses and retracts tongue