Tooth Whitening

Question 1

Extrinsic staining examples

Answer 1

Iron supplements
Smoking
CHX
Tea/coffee/red wine
Chromogenic bacteria (kids)

Question 2

Intrinsic staining examples

Answer 2

Fluorosis
Tetracycline
CF
AM/root filling materials
Thalassemia
Non vitality (blood products)

Question 3

Active agent in vital external bleaching

Answer 3

Hydrogen peroxide

Question 4

Warnings to give a patient for external bleaching

Answer 4

Sensitivity (usually wears off 2-3days post bleaching)
Relapse
Might not work
Gingival irritation

Question 5

What is the max % of hydrogen peroxide for home whitening

Answer 5

6%

Question 6

Lab card request for home bleaching trays

Answer 6

Please pour up alginate imps in 50:50 dental stone: plaster
Please provide 0.5mm thick soft acrylic vacuum formed splint
Stop 1mm short of gingival margin
Buccal spacer to allow for placement of gel
Review at 1wk

Question 7

When can restorative tx be completed

Answer 7

2 weeks after

Question 8

List causes of internal non vital discolouration

Answer 8

Dead pulp bleeding into dentine
Blood products diffuse + darken tooth