The VAS pain scale used in the study comprises a 100mm horizontal line where one end indicates "no pain" and the other end indicates "worst possible pain". The patients will mark each pain scale after fitting their teeth together. During the first day, patients will mark a scale every 3 hours until bedtime starting immediately after appliance placement. For the following 9 days, patients will mark 2 pain scales per day, one scale when they wake up and one at bedtime. The patient places a mark on the scale according to their judgment of the amount of pain they experience. The response is then measured to the nearest 0.5mm and can be used as pseudo-numerical data.