Locating Second Mesiobuccal Canals (MB2)
Leave No Canal Untreated with Ultrasonics
Studies on maxillary first molar anatomy show that the second mesiobuccal canal (MB2) is present in 65-90% of the cases. Ultrasonic instrumentation with a diamond coated insert (E2D or E6D) along the line connecting the primary mesiobuccal and the palatal canals will often reveal the MB2 orifice location. Clinically, the use of magnification and ultrasonics is the most effective technique to locate the MB2 canal.
Step-by-Step Calcified Canal Location
The orifice for the MB2 is usually located along the imaginary line connecting the main mesiobuccal canal (MB1) and the palatal canal, typically 2-3 millimeters distance from the MB1 orifice.
1 – Using a diamond coated ultrasonic insert (E2D or E6D), create a groove connecting the MB1 and the palatal canals. This will remove secondary dentin, lighter in color.
2 – The dentin covering the pulp chamber floor and its mesial wall must completely removed.
1. Create a groove to connect the MB1 and the palatal canal.
2. Locate the MB2 orifice along the groove.
3. Use an appropriate file to negotiate and prepare the canal.
Pulp chamber of a maxillary first molar.
E6D ultrasonic insert used to locate the MB2.
Manual file penetrating the MB2.
MB2 after location and preparation.
The MB1 and MB2 canals may be merged in a single oval or strip shaped canal.
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Dr. Keith Kanter, DDS
Starter Packs to get you going.
We’ve assembled three separate starter packs packaged with a procedure field guide to get you started supercharging ultrasonics in your practice.
Endo Starter Pack
The Endo Starter Pack includes 6 Ultrasonics Tips to get you started with Pulp Chamber, Middle Third and Activation procedures.
Endo Master Pack
The Endo Master Pack includes 12 Ultrasonics Tips for Pulp Chamber, Middle Third, Activation, Post Removal and Retreatment procedures.
Endo Guru Pack
The Endo Guru Pack includes 18 Ultrasonics Tips for maximum flexibility with Pulp Chamber, Middle Third, Activation,Post Removal, Apical Surgery and Retreatment procedures.
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