cold-cured acrylic

Question 1

what is the initiator of the setting reaction?

Answer 1

tertiary amine

Question 2

aka?

Answer 2

self-cured

chemically cured

Question 3

2 types?

Answer 3

1. POLYMETHYLMETHACRYLATE
2. POLYETHYLMETHACRYLATE

Question 4

Whatsnot present in type 2 cold cure acrylic?

Answer 4

mma

Question 5

indication for type 2?

Answer 5

allergy to MMA

Question 6

What irritates soft tissue more?

Answer 6

type 1 - MMA

Question 7

softeing temp of MMA?

Answer 7

90

Question 8

Softening temp of EMA?

Answer 8

67

Question 9

flaws of EMA?

Answer 9

greater risk of distortion or in cleaning

Question 10

flaw of cold-cured acrylic?

Answer 10

monomer leaches out over time - irritant

porosity
- due to air dissolved in the monomer which is not soluble in the polymer at room temp

need excess material in the mould

not as strong as heat cured

less conversion of monomer to polymer

more initial deformation and creep

slower recovery seen

poor long-term colour stability - due to tertiary amine

Question 11

pro of cold cure?

Answer 11

less internal strain as no external heat source used

Question 12

exothermic reaction?

Answer 12

YES

Question 13

indications?

Answer 13

removable orthodontic appliances

minor denture repairs and relines (lab)

chairside relines