Trust your Aura Clean Sonic ToothBrush. It will do all the brushing for you. These are the official Aura Clean Replacement Brush Heads.Fakes won’t get the job done. If you are using a worn brush in your mouth, it isn’t living up to its intended purpose. Replace Aura Clean brush heads every three months to achieve the best results or change before if you feel you need to. Some people like it that way.