Dental Tissues

Question 1

What sit he clinical crown

Answer 1

When the tooth in situ and has gingivae covering part of anatomical crown

Question 2

What are the basics of the tooth anatomy

Answer 2

Form exterior to interior

Enamel
Amelodentinal junction
Dentine 
Cementum 
Pulp

Question 3

What are the ideal properties for a tooth

Answer 3

String 
Resistant to wear or chem damage  
Hard
Respond to damage and repair
Aesthetic

Question 4

What are the mineralised tissues associated with the tooth

Answer 4

Enamel
Dentine
Cementum
Bone

Question 5

What is enamel

Answer 5

Covers anatomical crown 
Epithelial product
Hydroxyapatite 
2mm thick 
Translucent 
Non vital
Hard
Brittle

Question 6

How is enamel arranged

Answer 6

In prisms

Question 7

What is needed to cut enamel

Answer 7

Enamel bur which is a high speed sir turbine made with diamond and tungsten carbide

Question 8

Unsupported enamel is

Answer 8

Easily fractured with a hand instrument such as a chisel

Question 9

What si dentine

Answer 9

Specialised connective tissue 
Hard
Strong and resilient 
70% mineral and rest collagen 
Has pre dentine - non mineralised beside the pulp

Question 10

What are the directions of the collagen fibres in the dentine

Answer 10

Follow the outline of the enamel

Question 11

What is Carious dentine like

Answer 11

Soft

Cut with bladed bur or hand excavator

Question 12

How is dentin tubular

Answer 12

And has tubules continuos with pulp
Tubules may contain cell processes, nerves, fluid
Vital more tubules in pre dentine than amelodentinal junction

Question 13

What are some ways to ensure a filling stays in place

Answer 13

Mechanical undercut
Bond to enamel using acid etch
Bond to dentine using acid demineralisation, infiltrate with collagen with resin, penetrate tubules with resin

Question 14

What si the dental pulp

Answer 14

Specialised connective tissue
Essentially matured dental papillae
Dentine is calcified tissue of the pulp

Question 15

What are the functions of the pulp

Answer 15

Dentine formation
Defence and repair
Sensory

Question 16

What si the gross anatomy of the tooth

Answer 16

Pulp horns
Coronal pulp chambers
Radicular pulp
Apical formen

Question 17

What are the pulp variations

Answer 17

Apical formen

Lateral canals

Question 18

What si the dentine-pulp complex

Answer 18

Dentine and pulp are linked

• embryo logically
• physically
• functionally

Question 19

As dentine is porous what can this mean

Answer 19

Any material may irritate pulp can cause inflammation

Question 20

What si the cementum

Answer 20

Mineralised tissue 
Mineralised connective tissue 
Covers tooth roots
Tooth support
Resistant to resorption

Question 21

What is the cementum to enamel relationship

Answer 21

Usually overlap onto enable but if there is a gap this can cause sensitivity of teeth as contact dentine

Question 22

What is the

• apex
• cervical margin
• root
• anatomical crown
• Invisalign edge

Answer 22

Apex very tio of root
Root inside alveolus
Cervical margin is where root becomes crown and has enamel
Anatomical crown when tooth not in situ