Enter the pulp chamber until clear access is gained to the canal orifices. Fileshave to gain access without tension.
Sometimes it is better to prepare the access cavity prior to rubber dam placement. The contour of the root is more clearly visible (example: maxillary first bicusped which sometimes has 3 roots and 3 canals sometimes. The contour of the root on the buccal side is then less rounded.
Try to prevent dentin particles falling into the root canals. The pulp chamber should be cleaned carefully before starting to prepare the root canals.
Fill the pulp chamber and the root canals with natriumhypochlorite (5 %) for as long as possible. Only during the search for root canals is the pulp chamber kept dry to get a better look of the floor of the pulp chamber.
With the aid of the Operating Microscope the floor of the pulp chamber can be seen perfectly. With clear visibility a file can directly be put into the root canal. With a file in a needle holder it is easier to get access to the root canal entrance. In this way you have a better view of the floor of the pulp chamber.
Methylene blue is a good aid in searching for root canals. It colors the entrances of the root canals blue.
For a specific approach of tooth morphology clickhere.
Tips:
The tip of the needle holder will be placed directly after the rubber stop on the file. In this way the rubber stop can not be removed and stays at the good length.
and the pulp chamber is full with hypochlorite, the rotary file will clean itmself by turning (at least 300 rpm) in the hypochlorite (centrifugal forces).
Small steel files (006, 008, 010) detoriate quicklyat this stage. This is not clearly visible with the bare eye. The Operating Microscope shows changes perfectly.
These files should be thrown away immediately if it was difficult to get them into a root canal. After use such a file becomes a needle.
From this page the following products can be ordered in our catalogue