Tooth whitening or bleaching is one of the most popular aesthetic dental treatments. The procedure was first carried out by dentists in response to discolouration occurring in non-vital teeth resulting from trauma or endodontic treatment. It has been carried out since around 1800 (American Dental Association (ADA), 2009).
By 1980, tooth whitening had changed, with the development of dentist-prescribed bleaching done by the patient at home (tray bleaching), as well as other products and techniques for vital tooth bleaching in the surgery and at the patient's home (ADA, 2009).
For some patients, tooth whitening offers psychological benefits and increases confidence. It can also provide practices with excellent marketing potential, by increasing patients' appreciation of the services provided. Additionally, tooth whitening can be used at the end of a long treatment plan, such as a smile makeover, to complete and complement a patient's new look.
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