Aim of Study: The objective of this study was to compare the shaping ability of ProTaper Rotary instruments (Universal, Next), Hand ProTaper instruments and traditional hand instruments in long oval-shaped root canals. Methods and materials: Forty human teeth with long oval-shaped root canals were sectioned at 3 levels in the coronal, middle and apical third. A modified Bramante technique was used and analyzed changes in root canal maximum buccolingual and mesiodistal canal dimensions (ΔBL ,ΔMD) and changes in surface area (ΔA) , under (10X) magnification. Where the sample was divided into four groups each one contains (N=10) teeth and prepares by one of the four instrumentation systems. The morphological changes were analyzed by software Program (Auto Cad 2013).