Braces and other dental appliances make great breeding grounds for bacteria and other microorganisms, and flossing regularly can help bring down the development of plaque and other unpleasant dental conditions. However, flossing can be difficult, especially for people who have braces, bridges, dental implants, and permanent retainers that block the gums and teeth, which are very close to each other. Under such conditions, a floss threader should be used, as it allows proper navigation around these obstructions.