During tooth whitening, gums are protected with a blue light-curing shield. A whitening gel is applied and is then activated with a plasma lamp.
Finished case: the teeth are noticeably whiter and brighter.
Whitening of the left central incisor, which is seriously hyper chromatic after a root canal treatment, was performed after a trauma many years before.
Control at the same element of 4 years after the whitening treatment. The colour was stable.
Patient in position with orange colour glasses to protect eyes from the whitening light.