Spectrophotometric evaluation of color alterations with a new dental bleaching product in patients wearing orthodontic appliances

In‐Office Bleaching During Orthodontic Treatment

“…The hydrogen peroxide's free radicals are able to move in all directions through the dental structure under the bracket cementation adhesive interface. They break the organic stain molecules present all over the teeth labial face …”

“…One of the reasons that determine the decision of patients to under orthodontic treatment is the desire for a harmonious and aligned smile, aiming to satisfy the esthetic preferences present in modern society. However, the use of fixed orthodontic appliances, particularly in young patients, contributes to greater accumulation of plaque and stain deposition on teeth surfaces …”

Effectiveness of and tooth sensitivity with at-home bleaching in smokers

“…Although this scale is not linear in the truest sense, we treated the changes as continuous, with a linear ranking as was used in several clinical trials on dental bleaching. 2,3,13, 21 We calculated the color changes from the beginning of the active phase through the individual recall times by the change in shade guide units (DSGU) that occurred toward the lighter end of the value-oriented list of shade tabs. In the case of operator disagreement about color matching, we reached a consensus before dismissing the patient.…”

“…18 These components cause dental discoloration because of their dark hue and ability to adhere to dental surfaces. 19 The concern about bleaching in smokers also is highlighted by the eligibility criteria of several clinical trials on bleaching, which exclude smokers, [2][3][4]6,10,13,[20][21][22] without scientific support that smoking can jeopardize the bleaching outcome.…”

Spectrophotometric assessment of tooth bleaching under orthodontic braquets bonded with different materials

“…This can be explained by the fact that the exposure to the whitening agent in the pores and periquimacies of the enamel surface did not occur uniformly in the areas below the bracket, what is the case of bleaching in the absence of brackets. However, the bleaching action observed in the HP(t) and WP(t) groups showed that the bleaching agent was able to infiltrate into the bonding material, thus allowing bleaching, although statistically different from the positive controls 11,12 .…”