Slideshow Mode: Auto
with manual override.

  • <p>This tooth is an upper bicuspid. The opening you're looking at may lead to one or possibly two canals that need to be cleaned and shaped.</p><p>A dentist will use a file in conjunction with their tactile senses to explore and sound out the unseen configuration of the tooth's root canal system.</p><p>(Much of a dentist's work isn't based on what they can see but what they know to anticipate.)</p>
     

    This tooth is an upper bicuspid. The opening you're looking at may lead to one or possibly two canals that need to be cleaned and shaped.

    A dentist will use a file in conjunction with their tactile senses to explore and sound out the unseen configuration of the tooth's root canal system.

    (Much of a dentist's work isn't based on what they can see but what they know to anticipate.)

  • <p>When cleaning and shaping a root canal, files are used with an up and down, twisting motion.</p><p>Each file is worked for a number of repetitions (until it starts to feel loose in the canal).</p><p>The dentist then inserts the next larger size file and continues the process.</p>
     

    When cleaning and shaping a root canal, files are used with an up and down, twisting motion.

    Each file is worked for a number of repetitions (until it starts to feel loose in the canal).

    The dentist then inserts the next larger size file and continues the process.

  • <p>As each larger and larger file size is used, the diameter and flare of the canal is enlarged.</p><p>This is important for two reasons:</p><p>1) Enlarging the canal removes the surface layer from its walls (it's often impregnated with debris and contaminates).</p><p>2) It gives the canal a shape that's better suited for the sealing process.</p>
     

    As each larger and larger file size is used, the diameter and flare of the canal is enlarged.

    This is important for two reasons:

    1) Enlarging the canal removes the surface layer from its walls (it's often impregnated with debris and contaminates).

    2) It gives the canal a shape that's better suited for the sealing process.

  • <p>"Irrigation" (washing out a tooth) plays an important role during the filing process.</p><p>1) It carries away debris and contaminates, so they're removed from inside the tooth.</p><p>2) It flushes out the bits and pieces created by the filing action, so they don't get packed down and possibly clog up the canal.</p>
     

    "Irrigation" (washing out a tooth) plays an important role during the filing process.

    1) It carries away debris and contaminates, so they're removed from inside the tooth.

    2) It flushes out the bits and pieces created by the filing action, so they don't get packed down and possibly clog up the canal.