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When teeth whitening(bleaching) gels come into contact with the gums, they can cause irritation. Irritation of the gums is a condition that needs to be treated. In addition, if the external bleaching tone and the tone of the implant are incompatible, it may be necessary to repeat the bleaching process in people who use materials such as implants and prosthes. Apart from these, the teeth whitening process does not cause any permanent damage or structural change in the teeth.