Week 1 Oral Cavity

Question 1

Oral Cavity

Answer 1

n It begins at the lips and cheeks and extends posteriorly to the palatine tonsils, or tonsils
• The tonsils lie on each side of the throat between 2 folds of tissue, 1 in front and 1 in back- called the tonsillar pillars

Question 2

2 divisions of oral cavity

Answer 2

2 divisions of the oral cavity
(i) Vestibule: space that exists between the lips or cheeks and the teeth
(il) Oral cavity proper: area surrounded by the teeth back to the palatine tonsils
#This includes the floor of the mouth, hard and soft palates

Question 3

The Vestibule
Lips:
Vermillion zone:

Answer 3

The Vestibule
Lips: junction between skin of face and oral cavity
Vermilion zone: transitional zone of reddish tiss between the dry skin of the face and moist mucos of the oral cavity (lips)

Question 4

Vermillion Border

Answer 4

Vermilion border: outlines the vermilion zon (cold sores, herpesvirus, commonly appea along this border)

Question 5

Philtrum

Answer 5

Philtrum: small depression at the midline of the upper lip (cleft lip may be formed at the lateral junction of the philtrum)

Question 6

Mucobuccal fold

Answer 6

Mucobuccal fold; the point where the lips/cheeks turns to go toward the gingival tissue

Question 7

Alveolar mucousa

Answer 7

Alveolar mucosa; mucosa lying against the alveolar bone, loosely attached and moveable, reddish due to many blood vessels.
Mucogingival junction; the point where

Question 8

Mucogingival Junction

Answer 8

Mucogingival junction; the point where the gingiva becomes tightly attached to the bone

Question 9

Maxillary Labial Frenum

Answer 9

Maxillary labial frenum: fold of connective tissue attached to the upper alveolar mucosa, more pronounced than lower frenum
If the frenum is very firm, the central incisors may not be able to penetrate it causing the teeth to be pushed aside causing a space.

Question 10

Mandibulaur Labial Frenum

Answer 10

Mandibular labial frenum: same description as maxillary, but relating to the lower alveolar mucosa, could cause gingival recession by pulling down on the tissue when the lip is tensed

Question 11

Buccal Mucousa

Answer 11

Buccal mucosa: loosely adherent connective tissue of the inner cheeks

Question 12

Mucobuccal fold

Answer 12

Mucobuccal fold: fold in the vestibule where the labial or buccal mucosa meets the alveolar mucosa

Question 13

Mucogingival Junction

Answer 13

Mucogingival junction: border between the alveolar mucosa and attached gingiva

Question 14

Attached gingiva

Answer 14

Attached gingiva: gingiva that tightly adheres to the bone over the roots of the teeth

Question 15

Most common areas where there is misplaced Sebaceous glands known as Fordyce Granules

Answer 15

Mucousa of the lips,cheeks, retromolar pad

Question 16

Buccal Aveolar bone
Bony Growths

Answer 16

In a large portion of the population, on the buccal cortical plate of the mandible and maxilla, are bony growths called Exostosis

Question 17

The Oral Cavity Proper
Hard palate

Answer 17

• Hard palate: anterior portion of the palate that has transverse ridges, shape/size vary from individual, could be wide or narrow, high vault, or flat.
(i) Rugae - ridges of epithelial and connective tissue (often burned by hot foods) found on the anterior portion of the hard palate, and covered by keratinized epithelium
2) Incisive papilla - bulge of tissue at midline behind maxillary central incisors

Question 18

Hard Palate

Answer 18

Hard Palate
Excess bone growth can occur in the midline of the hard palate referred to as a maxillary torus or torus palatinus

Question 19

The Oral Cavity Proper
Soft Palate

Answer 19

• Soft palate: posterior nonbony portion of the palate that stretches back from the hard palate
(i) Uvula - midline muscular structure that hangs from most posterior portion which aids in speech and swallowing

Question 20

Lateral Borders

Answer 20

• Lateral borders: the teeth and mucosa confines the lateral boarders of the oral cavity proper

Question 21

Posterior Lateral

Answer 21

• Posterior lateral: bounded by tonsils and pillars
(i) Palatoglossal arch is the anterior pillar (ii) Palatopharyngeal arch is the posterior pillar

Question 22

Oral cavity Proper

Answer 22

Question 23

The Oral Cavity Proper
• Posterior borders:

Answer 23

• Posterior borders:
(i) Retromolar pad - small elevation of tissue posterior to the mandibular third molar (8’s)
(ii) Fauces - space between left and right tonsils, ask client to say “ahhh” allows you to see the fauces

Question 24

Tongue

Answer 24

• The underside or ventral side of the tongue shows many blood vessels close to the surface
• Lingual frenum is the fold of tissue extending from area near tip of the tongue to the floor of the mouth.
• If this frenum is attached close to the tip of the tongue, the tongue will have limited movement (ankyloglossia - “tongue tied”)
  Tissue beneath tongue is one of the thinnest in the oral cavity.

Question 25

Floor of Mouth

Answer 25

• At base of lingual frenum is a small elevation on each side known as
• Sublingual caruncles
• This is the opening for the ducts of 2 major salivary glands, submandibular and sublingual glands
• Extending from sublingual caruncles along the floor of the mouth on either side is a fold of tissue called
• Sublingual fold, small openings for the sublingual salivary gland are found along here

Question 26

Sublingual Carincle

Answer 26

Floor of the mouth:
- Sublingual caruncle are small elevations on each side of the base of the lingual frenum where the sublingual and submandibular ducts open

Question 27

Sublingual Fold

Answer 27

Extending from the sublingual caruncle back along the floor of the mouth on either side is a fold of tissue called the sublingual fold