Frequently Asked Questions
This chapter asks and answers the most frequently asked questions.
Practitioners will be able to answer the most common queries that patients have about bleaching.
Tooth discolouration is caused by external (extrinsic) or internal (intrinsic) colourants or a combination of both (see Tables 7-1 and 7-2 and Figs 7-1 to 7-10).
|Brown or black||Tea/coffee/iron|
|Yellow or brown||Poor oral hygiene/tea|
|Grey/brown/black||Pulp with haemorrhage|
|Yellow/grey||Pulp necrosis without haemorrhage|
|Brown/grey/black||Endodontic materials within the tooth|
|Brown/white lines/spots||Fluorosis (excessive fluoride swallowed during tooth development)|
|Brown/grey||Minocycline taken after tooth formation (adult teeth)|
|Yellow/brown/grey/blue||Tetracycline taken during tooth development|
|Doxycycline taken after tooth formation|
There are other causes of discolouration which have more pathological origins. These are outlined in Table 7-3 (page 100) and illustrated in Figs 7-11 />