Bleaching
Tooth sensitivity following vital tooth bleaching is a cause
for concern, affecting most people and lasting for 1-4 days
on average [154]. Sensitivity is thought to be due to the
hydrogen peroxide molecules passing through the enamel
and dentin into the pulp and causing pulpal inflammation
[155], which is different from the aetiology of dentin hyper-
sensitivity. Sensitivity from bleaching is usually transient,
although if bleaching is performed on individuals already
exhibiting sensitive dentin, the sensitivity can be severe and
prolonged. Desiccation of the tooth surface may also play a
role influencing sensitivity from vital bleaching [36].