Introduction
The appearance of teeth plays a significant role in human personality development and is often related with a perception of health and fitness. White and bright teeth are thought to be linked with health and beauty, so everybody wishes to have them. Presently, cosmetic dentistry is a dynamic part of restorative dental practice and cosmetic procedures are increasing in demand without age and gender difference. Popularity of cosmetic procedures is related to the upgradation of living standards (Gama Cunha et al., 2012).
Besides personality development, dentistry is playing a vital role in reducing the frequency and severity of dental problems, which has helped people from all age groups to maintain the natural strength of teeth for a longer period of time.
Discoloration of teeth is a common problem, faced by larger population of the world including New Zealand. Now, people are much conscious to improve the appearance of their discolored teeth. These people want to recover the esthetic appearance of their smiles, as well as they are searching for an effective method to restore natural teeth beauty (Baroudi & Hassan, 2014).
Dental bleaching, also called Dental whitening, is an important method in general dentistry to whiten teeth to …show more content…
(2015) stated that home bleaching is the most commonly used bleaching treatment, because of ease, safety, and effectiveness. This process generally uses low concentrations of whitening agent (10-20% carbamide peroxide or 3.5-6.5% hydrogen peroxide) applied on surface of teeth in gel form with the help of custom-made plastic bleaching trays (Tredwin, Naik, Lewis, & Scully, 2006). These trays are inserted in the mouth normally for 2-8 hours per day, over the period of 2-6 weeks (Baroudi & Hassan, 2014). Reducing chair time and producing prominent change in color make this process well accepted (Gama Cunha et al.,