Typically, the length of time your teeth whitening lasts depends on two factors: how you care for your teeth after the procedure, and what level of discoloration your teeth had prior to the treatment. At Grove City Center for Dentistry, we’re proud to offer two types of teeth whitening solutions: Opalescence Take-home Whitening and Opalescence GO. Opalescence Take-home Whitening includes a tray that custom-fits your teeth, which you wear with whitening gel from 15 minutes to overnight. Repeat applications from seven to ten times depending on the severity. Opalescence GO includes a universal-fit tray, which you wear with whitening gel from 15-60 minutes each day. Repeat applications from five to ten times depending on the severity.