I've never tried any professional whitening service, but I know a lot of dentists use this service called Zoom Teeth Whitening, and it's supposed to be an hour-long service that gives you instant ...

Teeth-whitening treatments ... Winter suggests using it to create a DIY whitening tray every now and then by using just the Opalescence syringe-gel refills: “Put a little stream of whitening ...

Rotate the bottom of the pen to dispense the gel and then apply it onto your teeth. After that leave the gel for about 30 minutes. The Philips Zoom Whitening Pen claims to provide you a desired result ...