dentine-pulp complex

Question 1

what does pulp contain?

Answer 1

. cells (odontoblasts, fibroblats defence cells)
. extracellular components (fibres and matrix)
. nerves (sensory and autonomic)
. BVs
. lymphatics

Question 2

function of pulp?

Answer 2

nutritive (BVs)
dentine growth 
dentine repair
defnece
neural (pain)

Question 3

what do dentine and pulp develop form?

Answer 3

dental papila

Question 4

what are the structural links between dentine and pulp?

Answer 4

odontoblast processes
nerve terminals
immune cells
dentinal fluid

Question 5

what are the 2 types of tertiary dentine?

Answer 5

reactionary and reparative

Question 6

give examples of tooth wear

Answer 6

abrasion
attrition (bruxism)
abfraction (occlusal overload leading to fracture)
erosion
caries

Question 7

which tertiary dentine is laid down in response to mild stimulus?

Answer 7

reactionary

Question 8

which tertiary dentine is laid down in response to intense stimuli destroying primary odontoblasts?

Answer 8

reparative

Question 9

primary odontoblasts lay down which type of tertiary dentine?

Answer 9

reactionary

Question 10

secondary odontoblasts lay down which type of tertiary dentine?

Answer 10

reparative

Question 11

describe hydrodynamics in relation to dentine-pulp complex

Answer 11

dentine hypersensitivity is due to the abrupt movement of fluid within the dentinal tubules

Question 12

which type of fibres are activated by hydrodynamic stimuli?

Answer 12

alpha beta and alpha delta

Question 13

list the functions of pulp nerves

Answer 13

sensory - mediate pain
sympathetic - vasoconstrion of BVs
parasympathetic - vasoldilate BVs
promote neurogenic inflammation

Question 14

what is pulpits?

Answer 14

acute inflammation in dental pulp, similar to that of other tissues but pulp cannot swell due to confinement within pulp chamber

Question 15

what effect does oedema have on the pulp?

Answer 15

increases pulp pressure, affecting blood flow and nerve excitability

Question 16

what is the most common cause of dentine hypersensitivity?

Answer 16

recession

Question 17

what is dentine hypersensitivity due to?

Answer 17

abrupt movement of fluid within dentinal tubules in response to cold and heat (thermal), osmotic (sugary food), mechanical (chewing) or evaporative (arblasts) stimuli

Question 18

how do sensitivity toothpastes work?

Answer 18

. contain k salts which desensitise nerves, depolarising them and stopping sensitivity
. tubule occlusion - block tubules and form smear layer over tubules acting like natural hydroxyapatite