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Tooth whitening or bleaching
Tooth whitening or bleaching ,lightens the colour of a tooth.Tooth whitening can be achieved by either changing the intrinsic colour or by removing and controlling the formation of extrinsic stains.
Why tooth whitening or bleaching ?
The natural light ivory color of enamel can turn to yellow, orange, brown, gray—even blue or green. Causes of discoloration include staining from coffee or tobacco, injury that has damaged the pulp, ingestion of the antibiotic tetracycline or high levels of fluoride while the teeth are developing, corrosion from silver fillings, and the natural wearing away of the enamel with age.With the advent of new treatments, a better smile is now within reach of more people. One of the most popular cosmetic procedures is bleaching for tooth whitening.
Tooth whitening or bleaching procedure
At dentists office
Your dentist etches your teeth with an acid solution and then applies an oxidizing agent to the enamel. Your teeth are exposed to a bright light or a laser to hasten the lightening. It usually takes three to four sessions, each lasting about 30–60 minutes, to achieve the color you want.
Professional whitening can be done in a dentist’s office in about an hour. The procedure involves application of a tooth whitening gel containing between 25% to 40% hydrogen peroxide, and then aiming a special heating lamp at your teeth for three 20-minute intervals, with reapplication of the gel between intervals. Some dentists may also use a laser, which is reported to accelerate or activate the whitening process. A protective barrier is used during the whitening procedure to keep your lips, gums, and tongue away from the whitening gel so it stays in place on your teeth. For optimal results, the dentist will usually give you whitening trays molded for your teeth so you can follow-up at home with bleaching solutions.
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At home bleaching
Your dentist will make a custom-fitted mouthpiece to hold the bleaching chemicals (carbamide peroxide or hydrogen peroxide). You then perform the bleaching at home by spreading the chemicals into the mouthpiece and putting it on for the recommended period (between 30 minutes and several hours) each day for a week or two. [/vc_column_text][/vc_column][/vc_row]