The hazards of electric toothbrushes are mainly caused by the wrong method of using people, mainly the following hazards: 1. Using an electric toothbrush and staying on a certain tooth for too long is likely to lead to excessive wear and tear of the enamel on the surface of this tooth, and even defects. 2. mistakenly thinking that electric toothbrushes are once and for all, not ensuring enough brushing time, leading to a worse oral environment. 3, Electric toothbrushes brush in the wrong direction, it is also likely to occur wear and tear, brush is not clean, etc.. The use of electric toothbrushes also need to master a good method, generally on the electric toothbrush have detailed instructions. If patients still can’t learn, they can also consider watching videos on the internet on how to brush with an electric toothbrush. Either way, it is important to make sure that you brush your teeth for between 4-5 minutes so that you can thoroughly remove plaque.