Bionnovation Graft Screws: Are used for the fixation and stabilization of bone grafts and nonabsorbable membranes (barriers) used in guided bone regeneration (GBR). The bone graft screws are temporary and must only stay within the bone reparation period because its purpose is to keep the graft and membrane stable for consolidation and bone neoformation. Versatile The screws have a diameter of 1.2, 1.4, 1.6 and 1.8 mm and are available in lengths of 4, 6, 8, 10, 12 and 14 mm to enable the fixation of blocks of various shapes and sizes. • Self-drilling; • Has a conical end and cylindrical, body; • Head inert in cross form;