The Dent-O-Care Interdental Brush 600 series are made with high-grade stainless steel and soft durable Tynex bristles. 6 brushes per wallet, each brush is rounded off at the end for comfort and safety. Interdental brushes help to prevent gum disease by getting rid of pieces of food and plaque from between your teeth. Plaque is a sticky substance made of bacteria. If it builds up, the bacteria can irritate the gums and cause inflammation (swelling). If your dentist advises you to clean between your teeth (interdental cleaning), they may recommend using interdental brushes. Instructions: Designed to remove plaque from around the tooth surface, gum margin and tooth pockets effectively and comfortably. Use a brush appropriate for the size of the space between your teeth, as advised by your dentist. Insert the brush gently between your teeth - don't try to force the brush into the space. If you work to a pattern round the whole of your mouth, it will help you not to miss out any of the spaces.