Table 2: Outline of Daily Events and Duration in the Three- Day pH Cycling Model

Event Duration
Treatment #1* 1 hour
Acid Challenge #1 3 minutes
Treatment #2 1 hour
Acid Challenge #2 3 minutes
Treatment #3 1 hour
Acid Challenge #3 3 minutes
Artificial Saliva, pH = 7.0 Overnight

* On Day One, Specimens were Pre-Conditioned for one Hour in Artificial Saliva Prior to the first Treatment