Teeth whitening or the teeth bleaching is done for whitening the teeth that have been discolored or stained. Teeth whitening can be carried out in-office teeth whitening or at-home teeth whitening using whitening strips, mouth trays, and whitening pastes.
Dentist teeth whitening can provide you amazing whitening teeth immediately. But, the big disadvantages of teeth whitening is their greater tooth sensitivity to cold and hot fluids. A common problem most people encounter after carrying out teeth whitening procedure is that they experience very sensitive teeth after whitening.
So what causes teeth bleaching sensitivity?
Teeth are enclosed in the gums. Inside each tooth, millions of minute dentinal tubules or tubes are present, which widens from inside the tooth (the pulp chamber) to the outer tooth surface. The fluid movement in the dentinal tubules causes sensitivity.
Normally the saliva with minerals or foods plugs the external ends of the dentinal tubules and stops the fluid movement inside the tube and sensitivity. However, during the teeth whitening process, strong bleaching agents like carbamide peroxide or hydrogen peroxide are used that removes away or dissolves the blocking minerals. When the plugs are cleaned or removed, the fluids are permitted to freely move in the dentinal tubules. Thus, this process is what makes teeth sensitive and increases sensitivity after teeth whitening.
(1) Reaction of acid in the gums and teeth
Tooth enamel which is already weakened (caused from decays or cracks, candies or sodas) permits easy penetration of the acids in the pulp and unplugs the materials that cause sensitivity and free movements of fluid.
(2) Moderate Pulpitis
Penetration of the teeth bleaching agents in the teeth increases the flow of blood and the pressure inside the pulp chamber and results in mild pulpits. The distribution of the bleaching agent inside the teeth is essential to provide whitened teeth; however, they can increase the pressure and annoy the nerves. This can cause very sensitive teeth after whitening to stimuli.
(3) Eroded enamel
In addition, teeth whitening agents are extremely reactive and can wear off enamel layer. At-home whitening toothpaste utilizes abrasives or course substances for whitening the teeth. And in-office whitening utilizes bleaching agents like hydrogen peroxide for whitening teeth. They can result in your teeth enamel getting removed. Since the enamel protects the teeth from dental caries and sensitivity, eroded enamels are at a very high risk of bacterial decays and bacterial caries. This can cause sensitive teeth after whitening.
Are some people more sensitive to bleaching agent for teeth?
Yes. Bleaching agents are acidic and strong. However, the reaction of acid can be different from person to person. For some persons, the reaction might be just a slight sensitivity while for some other person the reaction can be painful and severe. Every person has a different acid reaction and this is because of the person’s genetic role.
Genetics plays an important role in tooth sensitivity. For example, some fair skinned people might experience very higher sensitivity than the other people. A person with dental problems like dental decay, periodontitis, and gingivitis can also get very painful sensitivity after whitening teeth.
Hence, a thorough examination of the person’s dental health and dental history is needed before carrying out teeth whitening process. And some individuals may not be eligible at all to do the teeth whitening procedure.