Results in 30 minute treatment session PF formula strengthens enamel, decreases sensitivity prevents caries Great for whitening touch-ups or a jump start to a new whitening protocol. This 45% carbamide peroxide gel is administered under a dentist’s supervision in the controlled setting of the reception room. Opalescence Quick PF is applied using a custom-fitted, scalloped tray. Treatment times may vary. This option requires at-home follow-up with your custom trays – but gives you immediate results & a personalized first-time whitening experience with our staff.