Flexi-Flange Fiber by Essential Dental Systems is not just another “dowel” fiber post. Its serrated head permits greater retention of core material. Its Second Tier of the Shank increases the intimacy of fit between the post and the natural point at which the canal widens, thereby reducing destructive long lever arms. The Flexi-Flange Fiber Vent releases internal hydrostatic pressure upon cementation. Threaded design to have greater retention than passive fiber posts without the need for a bonding agent. Flexi-Flange is made from proprietary, epoxy reinforced, high strength S-Glass fiber. To be used specifically in cases without adequate coronal dentin for maximum retention and stability.