What types of stains are best suited to tooth whitening?
All types of stains are suitable for tooth whitening, although darker teeth may take longer to bleach. 7. Are there any stains that won’t respond to tooth whitening? Very severe tetracycline stained teeth (in other words teeth that are stained by these antibiotics) may not respond or have a limited response to tooth whitening. Response of the Stains to Bleaching: The initial colour of the affected teeth seems to determine the success or failure of the technique. It appears that the lighter the stain the easier it is to bleach. In order of easiest to bleach to most difficult: yellow, light grey, light brown, dark yellow, dark brown, grey or black. It has also been suggested that, because they are more porous, younger teeth would be easier to bleach than older ones. Effects on Dentine: Tooth colour is primarily determined by dentine and can be changed by bleaching treatments. In an in-vitro study (McCaslin AJ, Haywood VB, Potter BJ et al. Assessing dentin color changes from nightguard vi
