The design of the study is double blinded. Operators placing the appliances do not know which group the patient belongs to because assignment is done after appliance placement. The investigator measuring the patient responses does not know the group assignment because it is not indicated on the VAS booklet. The patients can be considered to be blinded because they are not aware of what the other group is receiving or that they are using a standard mouthwash that does not affect pain. After all measurement are done the booklet covers are reunited with their respective booklets for statistical data analysis.