Fig. (2) Atraumatic extraction of first left lower molar (left side). Any filling materials was removed using diamond and steel burs. The tooth was cleaned from residual calculus using piezoelectric instruments. Finally, it was cut in small pieces to facilitate the milling process. Tooth pieces were inserted in the machine and the device was started using the general switch button. Demineralized dentin graft was ready in 30-45 minutes to be placed in the patient’s mouth (right side). The particles size ranged between 0,4 and 0,8 mm.