DEN 017 SAS 2

Buccal Cavity/Mouth

Another term for Oral Cavity

Vestibule and Oral Cavity Proper

Two divisions of the Oral Cavity

inner surface of the lips and the anterior teeth with their gingivae

Boundaries of the labial vestibule

inner surface of the cheeks and the posterior teeth with their gingivae

boundaries of the buccal vestibule

Oral Cavity Proper

The inner and larger cavity

dorsal or dorsum

Term of the top surface of the tongue, which consists of papillae

Oropharynx

Section of the throat, located at the back of the mouth.

cheeks, tongue, and palate

The oral cavity is framed by the ___, ____, and ___.

Labial Vestibule

Cavity between the inner surface of the lips and the anterior teeth with their gingivae.

Buccal Vestibule

Cavity between the inner surface of the cheeks and the posterior teeth with their gingivae.

teeth, palate, tongue & floor of the mouth, oropharynx

Four Intraoral Structures

ventral

Term of the underside of the tongue

Oral Mucosa

Mucous membrane that covers the inside surface of the mouth

Lining oral mucosa

The epithelium is non-keratinized. The surface is thus flexible and is able to withstand stretching.

soft palate
ventral surface of the tongue
internal surfaces of the lips & cheeks
alveolar process

(4) Structures that are covered with lining oral mucosa:

Masticatory oral mucosa

The epithelium is moderately thick. It is frequently orthokeratinized, although normally there are parakeratinized areas of the gingiva and occasionally of the palate.

FALSE (correct: withstanding abrasion)

(T or F) Masticatory oral mucosa are well adapted to withstanding stretching.

hard palate covering
gingiva

Structures that are covered with masticatory oral mucosa:

Specialized oral mucosa

Some of them possess a mechanical function, whereas others bear taste buds and therefore have a sensory function.

dorsal surface of the tongue

Structures that are covered with specialized oral mucosa:

lips or labia

Entrance of the mouth

orbicularis oris muscle

The muscle that is covered by the lips, which regulates what comes in and goes out of the mouth.

Vermillion (upper & lower)

This is the transition area between the skin outside and mucous membrane inside.

Lips are very vascular with a thin layer of keratin

The reason why the lips are "red".

Oral fissure

The aperture of the mouth, described as the horizontal opening between the lips leading into the oral vestibule.

Labial frenum/frenulum

A midline fold of mucous membrane that attaches the inner surface of each lip to the gum.

Philtrum

The narrow vertical hollow in the center of the upper lip running down from the nose to the upper lip margin.

Nasolabial fold

Indentation lines on either side of the mouth that extend from the edge of the nose to the mouth's outer corners

Oral commissure

The outer corners of the mouth

Nasolabial sulcus

A furrow between the wing of the nose and the lip.

Parotid papilla

it is a projection at the opening of the parotid duct into the vestibule of the oral cavity opposite the neck of the upper second molar tooth.

Free gingiva

This tissue is not attached and forms a collar around the tooth.

Gingival margin/crest

The border region of the gingiva that touches the tooth.

Gingival sulcus/crevice

The trough around the tooth and its depth is normally 1-3 mm.

Attached gingiva

This tissue is adjacent to the free gingiva and is keratinized and firmly attached to the bone structure through collagen fibers resulting to a clinical feature described as stippling.

Alveolar mucosa

The area of tissue beyond the mucogingival junction. It seems less firmly attached and redder than the attached gingiva. It is non-keratinized and provides a softer and more flexible area for the movement of the cheeks and lips

Muco-gingival junction

The scalloped line that divides the attached gingiva from the alveolar mucosa.

Interdental papilla

The region of gingival tissue that fills the space between adjacent teeth. In a healthy mouth this is usually knife-edged and fills the interdental space.

Palate

The palate forms the roof of the mouth and the floor of the nasal cavity

Hard and Soft Palate

2 divisions of the palate

Hard Palate (palatum durum)

formed by the two-palatine process of the maxilla and the palatine bones

the incisive fossa, a pair of greater palatine and a pair of lesser palatine fossae

Five (5) foramina of the hard palate

Palatine rugae

Ridges situated in the anterior part of the palatal mucosa on each side of the medial palatal raphae and behind the incisive papilla (IP)

Soft palate

It is soft and movable and contains the muscle tensor veli palatini posteriorly. Attaches behind a palate.

Uvula

Fleshy extension at the back of the soft palate, which hangs above the throat

dentition

One set of teeth

diphyodont

Term used to describe two sets of teeth developed during the course of your lifetime.

deciduous teeth or baby teeth

First set of teeth developed

20 primary teeth

Number of deciduous teeth

32 permanent teeth

Number of succedaneous teeth

non-succedaneous teeth

permanent teeth without primary predecessors such as the permanent molars

8 Incisors

Four top and four bottom, are the sharp front teeth you use for biting into food

4 Canines (cuspids)

flank the incisors and have a pointed edge to tear up food

8 Premolars

Posterior to the cuspids, have an overall flatter shape with two rounded cusps useful for mashing foods.

12 Molars

most posterior and largest, which have several pointed cusps used to crush food so it is ready for swallowing

Wisdom teeth

The third members of each set of three molars, top and bottom

enamel, cementum, dentin and pulp

Basic tissues of tooth

enamel

hardest substance in the body and is somewhat translucent

ameloblasts

Cells that create the enamel

Cementum

The substance that covers the root of the tooth

cementoblasts

Cells that form cementum

dentin

The substance that lies beneath the enamel and the cementum in the tooth

odontoblasts

Cells that create the dentin

pulp

Where all the nerves and blood vessels that supply the tooth are housed

pulp chamber
pulp canals

(2) Division of the pulp

pulp canals

pulp which are located in the root(s) of the tooth

pulp chamber

pulp that are located in the crown of the tooth

gingiva

Part of the supporting structure of the tooth

Periodontal ligament

It serves to anchor the tooth form its cementum to the alveolar bone

Alveolar bone

A portion of the maxilla and mandible that supports the teeth by forming attachment for fibers of the periodontal ligament

Spongy bone

Separates the two plates of cortical bone in the alveolar bone

anterior

pertains to structures situated before or toward the front

posterior

pertains to structures situated behind

Superior

When an anatomical structure is situated higher up

Inferior

When an anatomical structure is lower in position

Medial

means a structure being located or occurring in the middle

lateral

If the structure is situated on, directed toward or coming from the side

Anterior Teeth

Includes incisors and canines in both arches

Posterior Teeth

Includes premolars and molars in both arches

Teeth

What is the oral structure that separates outer from inner cavity?

True

"The lip is covered by both skin and lining mucosa" True or False?

collagen fiber

The anchoring structure of the gingiva to the underlying alveolar process is called _________.

Periodontal fiber

provides cushion effect and supports the tooth in the alveolus (tooth socket)