Introduction
orthodontic
CAVITY, TOOTH SENSITIVITY
The effectiveness of at-home dental bleaching treatments depends on the time that bleaching products are in contact with the teeth surface and, consequently, on the adequate use of custom acetate trays. The home bleaching treatment was introduced in 1989, recommending the use of a 10% carbamide peroxide for 6 to 8 daily hours.Usage time measurements for removable orthodontic appliances have been performed using an electronic device that is able to identify the temperature of the oral cavity, which can be converted into time of use in the oral cavity.In the literature, there is a lack of studies that evaluate the influence of monitored daily usage times in the compliance of patients during at-home bleaching using randomized clinical trials and in color change and sensitivity. The objective of the present study was to assess the patient’s compliance and the tooth color change and sensitivity during at-home dental bleaching procedures with different usage times. The null hypothesis tested was: [1] daily usage time would not influence patients’ compliance during at-home bleaching; [2] daily usage time would not influence tooth color change during at-home bleaching, and [3] daily usage time would not influence tooth sensitivity during at-home bleaching.