Waxes

Question 1

wax compositions

Answer 1

animal - beeswax
vegetable - trees and plants
mineral - hydrocarbons

Question 2

dental applications of waxes

Answer 2

modelling
carding
boxing in
joining components

Question 3

what can you add to paraffin wax to increase MP?

Answer 3

Microcrystalline

Question 4

what can be added to paraffin waxes to decrease the brittleness?

Answer 4

beeswax

Question 5

what can you add to paraffin waxes to increase brittleness?

Answer 5

carnauba

Question 6

Describe the ‘lost wax technique’/ investment casting

Answer 6

a single metal object is made from a wax model

Question 7

what is made from the lost wax technique?

Answer 7

restorations
prostheses

Question 8

what wax is used in the process of making acrylic dentures?

Answer 8

modelling wax

Question 9

describe the wax composition of modelling wax used for try in stage

Answer 9

70-80% paraffin wax
12% beeswax
2.5% carnauba
3% synthetic resin
2.5% microcrystalline

Question 10

what type of wax is used crowns/inlays/bridges? and what colour is it?

Answer 10

inlay wax - blue

Question 11

term describing wax as solid at room temp and melting at high temps

Answer 11

thermoplastic

Question 12

what structure is wax?

Answer 12

crystalline

Question 13

what can wax undergo at softening temp

Answer 13

solid-solid transition

Question 14

types of vegetable waxes?

Answer 14

carnauba
candelilla

Question 15

beeswax structure

Answer 15

partially crystalline natural polyester

Question 16

examples of mineral (hydrocarbon) waxes

Answer 16

paraffin wax (straight chain)
microcrystalline (branched chain)

Question 17

how thick is wax for indirect modeling?

Answer 17

1.5mm

Question 18

at what temperature does paraffin wax soften?

Answer 18

37-55 degrees

Question 19

at what temperature does paraffin wax melt?

Answer 19

48-70 degrees