Oral Cavity Flashcards by Camelita Thrift

What is the vestibule in terms of the oral cavity?

A slit-like space between lips/cheek and teeth.

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What are the boundaries of the vestible?

Lateral

1) lips
2) cheek

Medial

1)Teeth

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The vestibule and oral cavity proper communicate through the ___________.

retromolar space.

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Lips are ______________epithelium but are not cornified so you can see the blood vessels under.

stratified squamous

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The border of the lips is called _________

vermilion border.

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Muscle fibers of the buccinator originate from the ____________, run anteriorly and blend with the orbicularis oris.

pterygomandibular raphe

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Which two muscles attach to the pterygomandibular raphe?

Superior pharyngeal constrictory m.

Buccinator

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These three muscles form a large muscular sphincter around the entrance to the oral tube

Buccinator

Obicularis Oris

Superior pharyngeal constrictor

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During chewing, food is kept between the occlusal surfaces by the ____________ and _________.

buccinator; tongue

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Food accumulates in the vestibule and may dribble out the corner of the mouth during chewing following lesions to CN _________.

VII

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“Sunken Cheeks” Is Characteristic Of:

A) Starvation

B) Anorexia nervosa

C) Chronic disease ( eg., cancer)

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The Parotid Duct Opens into the Vestibule Opposite the ____________.

2nd Maxillary Molar

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What are the two types of gingivae?

2 types of gingivae:

1) attached (true)
2) loose (free-alveolar mucosa)

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What are two types of gingivitis?

Chronic marginal gingivitis
- characterised by redness, swelling and bleeding. It is essentially a reversible condition.
Acute necrotizing ulcerative gingivitis (ANUG)
- The main features are painful, bleeding gums, and ulceration of inter-dental papillae (the sections of gum between adjacent teeth).
- trench mouth

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In what condition does infection involve alveolar bone?

PERIODONTIAL DISEASE

Periodontal disease is when the gums are slowly reabsorbed.
Major reason people lose teeth.

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___________ is the major cause of tooth loss.

Periodontal disease

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The oral cavity proper is represented by everything above the _________.

Mylohyoid muscle

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The palatoglossal fold can be connected to the ____________ to form anterior boundary of oral cavity.

linear terminalis

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The_______________ Separates oral cavity from oropharynx, the region of the gag reflex.

Palatoglossal Arch

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Label

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The Submandibular and Submental Spaces Are Inferior to the __________.

Mylohyoid

NOTE: The submandibular and submental spaces are potential spaces that can fill up with infection

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The ___________ Separates the Sublingual From the Submandibular & Submental Spaces

Mylohyoid

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Label

Mylohyoid line is like a watershed. Front teeth can have abscess that ruptures into __________ space, while back teeth ruptures into___________space.

sublingual ; submandibular

What is Ludwig's angina?

* **Bilateral** infection in sublingual, submandibular and submental spaces * Angina is a smothering type of pain. Spaces fill up with inflammation. Infection pushes tongue back that leads to asphyxiation “embarrassed airway”.

The ___________ anchors the tongue to floor of the mouth.

lingual frenulum

The ______________ is where the submandibular duct terminates.

sublingual papilla

Label

ANKYLOGLOSSIA

* Tongue-tied * Lingual frenulum is short * Can be snipped at dental office to help patients talk better

Sialolithiasis

* Salivary stones * Can block secretion of saliva * Can cause pain * Can cause bad breath too.

What are the contents of the floor of the mouth?

SALIVARY GLANDS sublingual gland submandibular duct submandibular gland (deep part) **NOTE:** The lingual nerve is lateral to the submandibular duct.

Label

Which structures can be found lateral to the hyoglossus muscle? What about laterally?

_Lateral to Hyoglossus_ 1. lingual n. 2. CN IX 3. CN XII 4. Submandibular duct _Medial to Hyoglossus_ 1. Lingual artery

Lingual nerve is a branch of \_\_\_\_\_\_\_.

Circumvallate papillae are large papillae with taste buds innervated by \_\_\_\_\_\_\_\_\_.

CN IX.

\_\_\_\_\_\_\_\_\_\_\_\_ is depression between larynx and base of tongue.

Vallecula

Label

The sulcus terminal divides the tongue into: root (posterior 1/3) in _________ and body (anterior 2/3) in \_\_\_\_\_\_\_.

oropharynx; oral cavity

List innervation for each part of the tongue

**NOTE:** CN IX also innervates circumvallate papillae

GVA &SVA fibers run in the __________ and terminate in the \_\_\_\_\_\_\_\_\_\_\_.

solitary tract; solitary nucleus

What are the three extrinsic tongue muscles?

Genioglossus Styloglossus Hyoglossus **NOTE:** Palaglossus is innervated by CN X and is not considered a true tongue muscle.

What is the function of genioglossus muscle?

genioglossus depresses & **protrudes the tongue** **\***Only muscle that protrudes the tongue

Geniopillo reflex.

If you stick out your tongue far enough your hair will stand up

What are the functions of styloglossus and hyoglossus?

_STYLOGLOSSUS_ retracts & elevates _HYOGLOSSUS_ retracts & depresses

What is the function of the intrinsic muscles of the tongue?

These muscles change the shape of the tongue \*These muscles originate and insert into the tongue

All muscles of the tongue are innerved by CNXII, except \_\_\_\_\_\_\_\_\_\_.

palatoglossus

Which salivary glands are serous and which are mucous?

Parotid Gland a) serous Submandibular gland a) serous & mucous Sublingual Gland a) mucous

Nerve fibers for Parotid Gland

* CN IX (lesser petrosal) * otic ganglion * auriculotemporal nerve

Nerve fibers for the submandibular gland

* CN VII (chorda tympani) * lingual nerve * submandibular ganglion

Nerve fibers for the sublingual gland

* CN VII (chorda tympani) * lingual nerve * submandibular ganglion

Lymph nodes of lateral tongue drain into \_\_\_\_\_\_\_\_\_\_\_

Submandibular nodes

Lymph nodes from the middle of the tongue drain into \_\_\_\_\_\_\_\_\_\_\_\_

Deep cervical lymph node

The tip of the tongue drains into \_\_\_\_\_\_\_\_\_\_\_\_

Submental nodes

Submental nodes receives lymphatic drainage from the ____________ of the oral cavity.

central part of the lower ½ ## Footnote **This includes: chin, lip, floor of mouth and tip of tongue.**

What parts of the oral cavity drain into the submental nodes?

a) tip of chin b) lower lip c) anterior floor of mouth d) tongue\* (tip)

What parts of the oral cavity drain into the submandibular nodes?

a) palate b) maxillary teeth c) upper lip d) vestibular gingivae e) floor of mouth f) cheek g) tongue\* (base)

What parts of the oral cavity drain into the drain into the deep cervical nodes?

Mandibular teeth Tongue