A.Oral health expert
A toddlers bite can chage depending on various facotrs: use of pacifier, thumb sucking etc. remember as the child grows, the jaw bones gorw as well and sometimes at a differnet pace (lower jaw develops faster for eg). this can change a persons bite.
Whitening products do tend to make teeth more sensitive so although it is safe to use, you will see an increase in the sensitivity.
There could be many factors as to why you sometimes feel pain and sometimes not. You first need to determine the cause of the pain- see a dentist and have an x-ray taken. so yes, teeth do go into "remission" sometimes.
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