Most common side effect of vital teeth bleaching:
Cervical resorption is a common consequence of bleaching of non-vital teeth whereas apical periodontitis is a common sequel of bleaching of vital teeth. The possibility of cervical resorption can be reduced by sealing the root canal orifice with cavit to prevent percolation of bleaching agent or by keeping a paste of calcium hydroxide and sterile water in the pulp chamber.
Cervical resorption
Discoloration
Apical periodontitis
Apical root resorption