1. Mild and moderate tetracycline teeth, dental fluorosis, or other factors caused by discolored teeth, hereditary yellow and black teeth, usually through a cold light whitening teeth treatment can get satisfactory results.
2. Severe tetracycline teeth, dental fluorosis, or other factors caused by discolored teeth, yellow teeth, generally need more than twice the treatment of cold light whitening teeth (no more than two weeks at intervals of up to two weeks), you can achieve a satisfactory whitening effect.
3. Severe tetracycline teeth, fluorosis, or other discolored teeth caused by enamel dysplasia need to be treated with cold light whitening teeth under the diagnosis of a doctor for a certain improvement. Can use porcelain teeth to repair.
Experts remind that some situations are not suitable for whitening teeth: people under the age of 16, pregnant women are not suitable for cold light whitening teeth, in addition, patients with periodontal disease must be treated before the cold light whitening teeth.