Figure 2a: Panoramic view 2b: Longitudinal section of the left maxillary fi rst molar 2c: Longitudinal section of the right maxillary fi rst molar 2d: Axial section through apical third section of root of the left maxillary fi rst molar 2e: Axial section through middle third section of root of the left maxillary fi rst molar 2f: Axial section through coronal third section of root of the left maxillary fi rst molar