**6.4. Ultrasonic debracketing**

It was reported that the ultrasonic debracketing technique presents a decreased probability of enamel damage as well as a decreased probability of bracket fracture. Also, the residual adhesive remaining after debracketing can be removed with the same ultrasonic tip. Nevertheless, the debracketing time is the longest when compared with the mechanical or electrothermal debracketing techniques. It was reported that the debracketing time of the ultrasonic debonding technique is 38–50 s per bracket, when compared with 1 s per bracket with the mechanical debracketing technique. Furthermore, the contact between the "hard" ceramic bracket and the ultrasonic tip has been reported to cause wear of this expensive tip. During the ultrasonic debracketing procedure, water spray is mandatory to prevent pulp damage. This method requires further testing and is not yet recommended for clinical use [11, 21]. No clinical studies were encountered upon a literature search.
