LS 631 Long Stem interdental brush (XX Fine). Pack of 8 brushes. Many dental professionals and users appreciate our Long Stem system for use without a holder. The specially long wire makes cleaning easier. The wire is plastic-coated for improved protection for delicate titanium implants. With their superb resilience, the bristles access all the critical places between the teeth. They open out in the gaps between the teeth to fill the space - and clean efficiently thanks to this umbrella effect.