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Cleaning and shaping coronal part of the canals

The coronal part of the canals will be cleaned at first. Much debris will be extruded from the root canal before anything can be pressed through the apex. A small file (006 or 008) has to get to the apex first to guarantee the accessibility to the apical part of the root canal.

With the Operating Microscope one can see clearly if the entrance to the canal is oval or round. This is important to the way one has to clean and shape a root canal.

The following instruments can be used:

• hand files
• Gates Glidden Drills 1, 2, en 3. (the bigger canals eventually with 4 of 5)
• Rotary-files
• Ultrasonic files (EMS)
• LN-burs (thin round burs with a long shank. Long neck is LN)

When shaping the coronal part of the root canal it is important that the file gets into the canal without to much curvature. So the access cavity should be large enough to facilitate the file to enter easily the canal. A good access cavity also has advantages in apical control, irrigation efficacy and condensation procedures.



During cleaning and shaping the pulp chamber is always full of hypochlorite solution. Rotary files (300 rpm) are cleaned by centrifugal forces in the pulp chamber.

For good cleaning and disinfection of the root canals at least 50 ml per canal should be used. The effectivness will be greater when the hypochlorite has a temperature of about 50 degrees Celcius. You can easily warm the hypochlorite using two plastic cups. One filled with hot water and the other with the hypochlorite (au bain Marie). When repeated several times the temperature of the hypochlorite reaches a temperature from 50 - 60 degrees Celcius. It has better dissolving properties at this temperature.

After cleaning of the coronal part of the root canal the length of the root canal will be determined with anapex locator.

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From this page the following products can be ordered:

• Operating Microscope
• Gates Glidden Drills
• Hand files
• LN-burs (is Long Neck)
• Rotary-files
• Ultrasonic files (EMS)
• Files

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To last chapter: Searching for root canals
To next chapter: Length Determination

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