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October 2002 – Technique Adjustment for a 5-Canal Mandibular Molar
Very satisfactory results can be achieved with different shaping techniques. Ni-Ti Rotaries have shown to be excellent in handling cases where roots are long and curved. However, sometimes the anatomy of the tooth is not as straightforward as we think it is. We occasionally come across situations where files "seem to go all over the place" when they are placed in the canals. Canals may be noticeably joined at the midroot and not just at the apex. ( The classic C shaped mandibular molar is an excellent example.) If a Ni-Ti file is placed in one canal and its tip catches in the opening in the 2nd adjacent canal, it can easily break, blocking both canals.In those cases it is necessary to adjust cleaning and shaping or obturation techniques to compensate for unusual anatomy or when rotary techniques run increased risk of breakage. This tooth presented for endodontic treatment and is effectively managed by altering technique to account for the different types of canal anatomy.