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oral biology and clinical sciences 1 > dentine and pulp > Flashcards

Flashcards in dentine and pulp Deck (13)
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1
Q

is dentine harder or softer than bone?

A

harder

2
Q

is dentine harder or softer than enamel?

A

softer

3
Q

does dentine have greater or lesser tensile and compressive strength compared to enamel?

A

greater

4
Q

how is dentine permeable?

A

contains tubules

5
Q

what are the contents of dentine and their percentage?

A

hydroxyapatite (70% weight, 50% vol)
water (10% weight, 20% vol)
organic matrix (20% weight, 30% vol)

6
Q

where do the tubules in dentine run from?

A

amelodentinal junction to pulp

7
Q

why does caries affect the pulp in a lower area than the lesion on dentine?

A

the curvature of dentine tubules

8
Q

which cells create non-mineralised organic dentine (predentine)?

A

odontoblasts

9
Q

what is dental pulp and what are the components of it?

A

connective tissue, containing odontoblasts, fibroblasts, defence cells, fibres (collagen & oxytalan), matrix, nerves, blood vessels and lymphatics, proteoglycans

10
Q

what is the function of dental pulp?

A

nutritive, dentine growth, dentine repair, defence, neural

11
Q

what name is given to dentine before the tooth has completely formed?

A

primary dentine

12
Q

what is secondary dentine?

A

dentine when tooth has formed

13
Q

what is teriary dentine?

A

reparing dentine