comparing the effectiveness of sodium floride varnish, diod laser and potassium nitrate in reducing post-office bleaching hypersensivity

Choosing the proper substance to reduce sensitivity after office bleaching

After accepting the patients applying for Inclusion and exciusion criteria and explaining the objectives of the study and the implementation method, the patients enter the research. After checking the level of sensitivity with the help of Visual Analog Scale (VAS)and obtaining informed consent, bleaching treatment is started, and all patients undergo office bleaching treatment using 35% hydrogen peroxide (Whiteness HP, FGM). immediately after bleaching, tooth sensitivity is evaluated with the help of the VAS. First, people are randomly subjected to one of the treatment methods. The level of dental sensitivity immediately after each treatment and also 24 and 48 hours after the treatment should be measured by the trained VAS method and informed by phone and recorded in the questionnaire.

Restorative department of Yazd Faculty of Dentistry

Inclusion criteria: 1,at least 18 years old 2- have eight caries free maxillary anterior teeth without restorations on the labial surfaces and 3,shadeA2 or darker based on vita 4, Patients who had not undergone tooth whitening procedures 5, non previous tooth sensitivity 6,non pregnant/lactating,7, non severe internal tooth discoloration 8, non bruxism habits, 9, non sever gindival recesion 10, non class5 caries 11, non- expose dentin or any condition that changes tooth sensivity exclusion criteria: 1, Non-cooperation in reporting sensitivity level 2- Non-cooperation in treatment

1:potassium nitrate 2: 5% sodium fluoride varnish 3: Low power diode laser treatment

Sensitivity level(immediately,24,48 hour) after anti-sensivity treatment

people are randomly divided into three groups, 1, 2, and 3, then a number is selected from numbers 1 to 3 using the random number table and attributed to the first method of reducing sensitivity (potassium nitrate) and the second random number is attributed to the second method (sodium fluoride varnish). And the third random number is attributed to the third method (laser). Each group is subjected to one of the following treatment methods: Method 1: Treatment with potassium nitrate Method 2: treatment with 5% sodium fluoride varnish Method 3: Low power diode laser treatment

Information about the level of dental sensitivity of people is shared in different groups

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