dentine and pulp

Question 1

is dentine harder or softer than bone?

Answer 1

harder

Question 2

is dentine harder or softer than enamel?

Answer 2

softer

Question 3

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

Answer 3

greater

Question 4

how is dentine permeable?

Answer 4

contains tubules

Question 5

what are the contents of dentine and their percentage?

Answer 5

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

Question 6

where do the tubules in dentine run from?

Answer 6

amelodentinal junction to pulp

Question 7

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

Answer 7

the curvature of dentine tubules

Question 8

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

Answer 8

odontoblasts

Question 9

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

Answer 9

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

Question 10

what is the function of dental pulp?

Answer 10

nutritive, dentine growth, dentine repair, defence, neural

Question 11

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

Answer 11

primary dentine

Question 12

what is secondary dentine?

Answer 12

dentine when tooth has formed

Question 13

what is teriary dentine?

Answer 13

reparing dentine