That old fraying toothbrush you’re using could be hurting your quest for a healthy smile. “As the bristles wear down, they become worse at removing plaque,” says Jessica Emery, a cosmetic dentist in Chicago. If the bristles are bent, you’re sick, or you’ve been using the same brush for more than 3 months, it’s time to switch. Here are 3 newcomers that get the job done—and then some. Media Platforms Design TeamFOR SUPERSENSITIVE TEETH.The bristles in the Colgate 360 Enamel Health Manual Toothbrush ($3.50; drugstores) are 50% softer than a standard brush’s, decreasing damage to teeth and gums. Media Platforms Design TeamA RECYCLABLE TOOTHBRUSH.The WooBamboo Standard ($5; woobamboo.com) won’t spend the next 200 years in a landfill, thanks to its biodegradable bamboo handle. Even the bristles are recyclable—you just have to yank them out with pliers first.