Angulated Brush Double Sided This instrument was has been designed to extend the flap without incision and it also reduces the stiffness of the flap. The concept of the Soft Brushing is to separate the collagen fibers of the fibrous periosteum: the stiffness is reduced and the flap release increases just by using the brushe. No Incision, no bleeding, no stress, no pain, no inflammation and no risk.