Oral Biology - Intro to Periodontal Tissues

Question 1

What does the periodontium consist of?

Answer 1

• Periodontal ligament
• Bone
• Adjacent mucosa (gingiva)

Question 2

Name the structures.

Answer 2

Question 3

** provides the attachment of the alveolar bone to the tooth.

Answer 3

Periodontal Ligament (PDL)

Question 4

What makes the PDL strong and flexible?

Answer 4

Dense fibrous connective tissue

Question 5

Where are stem cells for the tooth stored?

Answer 5

Within the PDL. Osteoblasts, fibroblasts, cementoblasts etc.

Question 6

Primary functions of the PDL?

Answer 6

• Tooth-bone attachment
• Shock absorber (during mastication)
• Heavily innervated

Question 7

Name the structures

Answer 7

Question 8

Function of the alveolar bone

Answer 8

Hold the roots of teeth
To absorb and distribute occlusal forces generated by oral functions

Question 9

*** Bone is positioned inferior to Alveolar Bone

Answer 9

Basal

Question 10

If the tooth is removed, what happens to the surface of the pocket left?

Answer 10

The alveolar bone gradually disintegrates and the gingiva grows over the void, creating a smooth surface.

Question 11

Function of the basal bone?

Answer 11

Gives shape + strength

Question 12

Alveolar and basal done refers to the position whilst cortical and trabecular bone refers to…

Answer 12

the type of bone.

Question 13

Which bone is “spongy”?

Answer 13

Trabecular bone

Question 14

What is usually referred to as the “socket” of the bone?

Answer 14

The Lamina Dura

Question 15

Where is local anaesthesia applied?

Answer 15

Into the alveolar bone, travels through to trabecular bone as it is very porous. Drug enters through the apex (via nerves). Won’t work on lower teeth (molars)

Question 16

Intraligamentary anaesthesia is applied into…

Answer 16

the Periodontal Ligament

Question 17

The Oral Mucosa is…

Answer 17

the mucous membrane lining or “skin” inside of the mouth, including cheeks and lips.

Question 18

Main functions of the Oral Mucosa

Answer 18

• Protection
  
  • Mechanical
  • Bacterial
  • Chemical
  • Prevent dehydration - barrier
• Sensation
• Secretion
• Thermal Regulation

Question 19

Oral Mucosa is comprises of two types of tissues:

Answer 19

• Epithelium (provides barrier)
• Connective Tissue (provides strength)

Question 20

What are the three types of Mucosa?

Answer 20

• Masticatory Mucosa
• Lining Mucosa
• Specialised Mucosa
• Gustatory Mucosa - sensation of taste

Question 21

What is the function of each type of mucosa?

Answer 21

• Masticatory (Chewing)
• Lining (Flexibility)
• Specialised (Tongue (taste))

Question 22

Where are the masticatory surfaces of the Oral Cavity?

Answer 22

1.) Hard Palate
2.) Attached Gingivae
3.) Dorsal surface of the tongue

Question 23

Where is the specialised (i.e., gustatory) mucosa found?

Answer 23

Dorsal surface of the tongue

Question 24

Name characteristics of the gingival mucosa

Answer 24

• Masticatory
• thick epithelium
• Keratinised
• Pink
• Firm
• Stippled

Question 25

Name characteristics of the Alveolar Mucosa

Answer 25

• Lining Mucosa
• thin epithelium
• non-keratinised
• red
• loose/mobile
• smooth

Question 26

Name the structures

Answer 26

Question 27

Name the type of lining

Answer 27

It is crucial to understand where to insert the injection to avoid unnecessary pain for the patient.

Question 28

Annotate the structures

Answer 28

Question 29

What is the gingival sulcus?

Answer 29

“The point at which the tooth and the gingivae meet”