DH 314 - Oral Cavity and Pharynx wk 1

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Questions and Answers

What do the maxillary bones form during development?

A flexible joint

A mobile articulation

A movable hinge

An immobile articulation (correct)

Which of the following correctly describes the mandible?

Consists of two fused bones

Is an immobile structure

Is the largest bone in the skull

Has a mobile articulation (correct)

What structure contains each tooth socket in the maxilla and mandible?

Alveolar process (correct)

Root

Crown

Dentin

Which parts make up a mature and fully erupted tooth?

Crown and root(s) Signup and view all the answers

What is the outer layer of the tooth crown composed of?

Enamel Signup and view all the answers

What color is the moderately hard inner layer of a tooth called dentin?

Yellow Signup and view all the answers

Which component of the tooth is considered the soft innermost layer?

Pulp Signup and view all the answers

How many maxillary bones are fused to form the maxilla?

Two Signup and view all the answers

What is the primary reason dental professionals must be knowledgeable about the oral cavity?

To improve overall health of every patient Signup and view all the answers

Which structure marks the anterior boundary of the oral cavity?

The lips Signup and view all the answers

What distinguishes the oral cavity from the pharynx?

The presence of teeth in the oral cavity Signup and view all the answers

In what context is a change in oral tissue clinically significant?

When it signals a condition of clinical significance Signup and view all the answers

Which of the following is NOT a division of the oral cavity?

Posterior wall Signup and view all the answers

Why are anatomical illustrations oriented to show the head in anatomic position?

To provide a standardized reference Signup and view all the answers

Which part of the oral cavity does NOT include landmarks?

The oral cavity itself Signup and view all the answers

What is the role of the alveolar processes in the oral cavity?

They house the roots of teeth Signup and view all the answers

What structures are referred to as the 'tonsils' in patients?

Palatine tonsils Signup and view all the answers

What is the primary function of the palate?

To separate the oral and nasal cavities Signup and view all the answers

Which part of the palate is the anterior arched portion?

Hard palate Signup and view all the answers

Where is the incisive papilla located?

At the anterior part of the hard palate Signup and view all the answers

What defines the soft palate?

It is yellower, looser, and softer than the hard palate. Signup and view all the answers

What is the median palatine raphe?

A midline ridge of tissue from the incisive papilla to the uvula Signup and view all the answers

What can a palatal torus interfere with?

Prosthetic procedures for the maxillary alveolar process Signup and view all the answers

What are palatine rugae?

Firm irregular ridges of tissue in the hard palate Signup and view all the answers

What is the main feature of the oral cavity proper?

The tongue Signup and view all the answers

Which part of the tongue lies within the oral cavity proper?

The oral part of the tongue Signup and view all the answers

What is the area at the front of the tongue referred to as?

The apex Signup and view all the answers

What structure on the dorsal surface of the tongue separates it longitudinally?

The median lingual sulcus Signup and view all the answers

Which structures on the tongue are associated with taste buds?

Lingual papillae Signup and view all the answers

Where is the base of the tongue located?

In the pharyngeal region Signup and view all the answers

Which of the following is NOT true regarding the posterior one-third of the tongue?

It is located in the oral cavity proper Signup and view all the answers

What is the irregular mass of tissue found on the dorsal surface of the base of the tongue called?

Lingual tonsil Signup and view all the answers

What tissue mass is found on the dorsal surface of the base of the tongue?

Lingual tonsil Signup and view all the answers

Which structures are located on the underside of the tongue?

Deep lingual veins and plica fimbriata Signup and view all the answers

What defines the location of the floor of the mouth?

Inferior to the ventral surface of the tongue Signup and view all the answers

What is the anatomical feature connecting the tongue to the floor of the mouth?

Lingual frenum Signup and view all the answers

What is the function of the plica fimbriata?

To support the lingual frenum Signup and view all the answers

Which structures represent the lateral surface of the tongue?

Foliate lingual papillae Signup and view all the answers

What anatomical structure forms a V-shaped configuration on the floor of the mouth?

Sublingual fold Signup and view all the answers

What distinguishes the deep lingual veins on the ventral surface of the tongue?

They pass close to the surface Signup and view all the answers

Study Notes

Importance of Oral Cavity Knowledge

Dental professionals play a crucial role in improving patient health.
Understanding the oral cavity and pharynx is vital for recognizing clinical conditions.

Anatomic Position

Textbook illustrations depict the head in an anatomic position for precise reference.

Oral Cavity Divisions

The oral cavity encompasses vestibules, dental arches, teeth, and the oral cavity proper, each with unique landmarks.
Anterior boundary marked by lips; posterior boundary defined by the pharynx (throat).

Jaws and Alveolar Processes

Maxilla consists of two immobile, fused maxillary bones.
Mandible is a single bone with a mobile joint, allowing movement.
Alveolar processes are the bony extensions housing tooth sockets (alveoli).
Mature teeth feature both a crown and root structure.

Tooth Structure

The crown comprises an outer layer of enamel (hard, white) and an inner layer of dentin (moderately hard, yellow) encasing the pulp (soft, pink).
Roots consist of dental pulp covered by dentin.

Palate

The palate divides the oral cavity from the nasal cavity, featuring a hard anterior portion and a softer, more flexible posterior portion.
Incisive papilla is a prominent bulge at the anterior hard palate; palatine rugae are irregular ridges radiating from it.
Median palatine raphe is a ridge extending from the incisive papilla to the uvula.

Palatal Torus

A palatal torus may appear at the midline and can impact prosthetic considerations.

Tongue Anatomy

The tongue is the most prominent feature of the oral cavity.
Posterior one-third is the pharyngeal part, while the anterior two-thirds form the body.
Apex refers to the tip of the tongue; the dorsal surface has a median lingual sulcus.

Lingual Structures

Lingual papillae, present on tongue surfaces, are associated with taste buds.
Lingual tonsil is located at the dorsal surface's base and should not be confused with palatine tonsils.
Foliate lingual papilla appear on the lateral surfaces of the tongue.

Ventral Surface of Tongue

The underside features deep lingual veins, with lateral plica fimbriata showing fringelike projections.

Floor of the Mouth

Inferior to the tongue in the oral cavity proper.
The lingual frenum is a midline fold of tissue connecting the tongue to the floor.
Sublingual folds are tissue ridges on either side of the floor, forming a V-shape towards the tongue's base.

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Description

This quiz covers Chapter 2 of the Dental Morphology course, specifically focusing on the oral cavity and pharynx. Students will test their knowledge on anatomical structures and functions related to this important area of dental health.