IRCT20110212005804N4 IRCT 2019-10-15 Islamic Azad University effect of laser on the pulp changes Comparison of the effect of the use of the two types of Nd: YAG 1064 nm laser) (Er: YAG (2940 nm) on thermal changes of the premolars human pulp during removal of ceramic brackets (clinical trial) 2019-02-01 anticipated 6 Complete https://irct.ir/trial/36653 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Samples are placed in a randomized 4-block by the method of Balanced Block. The randomization process is performed by an individual other than the investigator, and information about the sample intervention is stored in sealed envelopes in order to randomize the excel software, Blinding description: The patient is aware of the research process. The analyzer is not aware of the investigation process. The evaluator is not aware of the research process. 3 pulpitis. Intervention 1: First intervention group: In the first group,. An Er: YAG laser will be used at 2940 nm wavelength lightweakter (LightWalker AT, Fotona, Ljubljana, Slovenia). The handpiece will be used for contact type (H14 C, Fotona, Slovenia). The fiber used is Cylinderry and its tip, with a length of 8 mm and a diameter of 3.1 mm. The settings for this mounting bracket are as follows: 1.2 W, 600 MJ, 2 Hz, Pulse Long without spray of weather. Intervention 2: Second invertion group:In the second group, a Nd: YAG laser with a wavelength of 1064 nm will use the LightWalker AT, Fotona, Ljubljana, Slovenia, which has the characteristics as follows: 0.2 millisecond pulses and 3 watts for 3 seconds The outer diameter of the fiber is 400 microns and its tip is 1 mm from the surface of the bracket and perpendicular to the bracket surface. After the prescribed period of radiation, the bracket device is removed with the plug-in. Yes - There is a plan to make this available What will be shared: Only part of the data, such as the key outcome information or the like, can share. When: Start of access period 6 months after printing results To whom: Readers of the published article Conditions: In case of publish the article Where to obtain: Target journal How to obtain: Refer to the desired journal site Comments: