Do all teeth whiten to the same degree?

[Smashie]

Can it be guaranteed that teeth will all be the same degree of whiteness after a tooth whitening process and does this vary depending upon the type of process used?

[Dr Mohsen J. Esfahani]

No different teeth whitening systems achieve different results. Results vary depending on the teeth whitening methods used, the concentration of the whitening gel used, the length of time over which teeth whitening is carried out, how well the whitening trays were made and the experience of the dentist.