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Tooth whitening or tooth bleaching is the process of lightening the colour of human teeth. [1] Whitening is often desirable when teeth become yellowed over time for a number of reasons, and can be achieved by changing the intrinsic or extrinsic colour of the tooth enamel . [ 2 ]
Fluoride varnish is widely used in the United Kingdom, following guidelines from multiple sources backing its efficacy. Public Health England, a UK government organisation sponsored by the Department of Health, released guidance in 2014 recommending fluoride varnish application at least twice yearly for children and young adults. [13]
Studies show that whitening does not produce any ultrastructural or microhardness changes in the dental tissues. [8] Studies show that patients who have whitened their teeth take better care of them. [45] However, a tooth whitening product with an overall low pH can put enamel at risk for decay or destruction by demineralization.
As primary teeth are being developed, the ingestion of fluoride causes the teeth to form stronger and more resistant to cavities, although this increases the risk of dental fluorosis. [10] [11] [12] Water and milk fluoridation are two forms of systemic fluoride therapy that are effective at preventing dental cavities. [13]
Whitening toothpaste cannot alter the natural color of teeth or reverse discoloration by penetrating surface stains or decay. To remove surface stains, whitening toothpaste may include abrasives to gently polish the teeth or additives such as sodium tripolyphosphate to break down or dissolve stains. When used twice a day, whitening toothpaste ...
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