• Create straight-line access to canal orifice (SX) • Shape the coronal 2/3, confirm working length and smooth the root canal (S1, S2) • Shape the apical 1/3 with finisher (F1, F2). If necessary, proceed to F3, • SX-S1 S2 F1/F2→F3
• Create straight-line access to canal orifice (SX) • Shape the coronal 2/3, confirm working length and smooth the root canal (S1, S2) • Shape the apical 1/3 with finisher (F1, F2). If necessary, proceed to F3, • SX-S1 S2 F1/F2→F3