Put to the test
STEP 4 Carlene applies barrier material over my gums to protect them from the whitening gel. A light hardens the barrier material.
STEP 5 She then uses a brush to apply the gel to each tooth.
STEP 6 A machine that emits light is interlocked with the retractor to activate the gel.
The process is repeated three times,and with each session, the gel bleaches your teeth lighter and lighter.