GUM Tight Proxabrush Refills are perfect for people who have narrow spaces between their teeth. Each Proxabrush is made from nylon and features a precision manufactured brush head with unique triangular bristles. These triangular bristles are effective in removing more dental plaque than round bristles. GUM Proxabrush bristles also feature an antibacterial coating, which helps keep the brush head clean and hygienic between uses. These Proxabrush heads will not scratch dental implants, nor will they cause galvanic shock. Don’t let your GUM Proxabrush head get old and worn out, make sure you’ve always got a supply of refills for your GUM Proxabrush Dual-Ended Handle (605).