You can brush your teeth with an electric toothbrush after repairing the tooth. The usual way to repair a tooth is to perform a filling treatment, and depending on the size and location of the cavity, different filling materials are used. Usually, resin filling is used. Resin filling is the ideal filling material, it is instantly cured and has excellent bonding and hardness, so after filling, it can restore the hardness and chewing power of the tooth without affecting any eating, speaking and chewing. So after the filling, brushing with an electric toothbrush does not have any effect.