Brush heads are the replaceable parts of toothbrushes, designed to clean teeth and gums effectively. They come in various shapes and sizes, catering to different dental needs. Some brush heads are soft for sensitive teeth, while others are firmer for deeper cleaning. Electric toothbrushes often feature interchangeable brush heads, allowing users to select the best option for their oral hygiene routine. Many brands, such as Oral-B and Philips Sonicare, offer specialized brush heads for specific purposes, like whitening or plaque removal, enhancing the overall effectiveness of brushing.