<human>: I'd like to know if it is safe to use a sonic toothbrush.
<bot>: It depends on what you mean by "safe." Sonic toothbrushes are generally considered safe, as they have been found to be effective in reducing plaque and gingivitis when used correctly. However, the risk of injury or discomfort from using one can vary depending on how it is used. So it's important to follow instructions carefully and make sure that the brush is not too aggressive for your teeth and gums. If you have any questions about the safety of a particular model, it's best to consult with a dentist or dental hygienist before making a purchase.