Steps in Access Opening

We can divide the complete process of access cavity preparation into seven distinct steps :

  • STEP # 1 Relieve the tooth out of occlusion “Reduce Postoperative Discomfort”.
  • STEP # 2 Use caries as a guide “Chase the caries”.
  • STEP # 3 Laws of Access Opening “Know your Geography”.
  • STEP # 4 De-roofing of pulp chamber “Most important rule of access opening”.
  • STEP # 5 Observe the color change “Color is the language of Endodontics”.
  • STEP # 6 Remove dentinal shelves “Establish straight-line access”.
  • STEP # 7 Locating the Canal Orifices “Eureka Moment!!!”.

Laws Of Access opening in detail

Laws of a relationship of the pulp chamber to the clinical crown:

Law of centrality: The floor of the pulp chamber is always located in the center of the tooth at the level of the CEJ.

pulp-chambers-1

Law of concentricity: The walls of the pulp chamber are always concentric to the external surface of the tooth at the level of the CEJ.

wall-of-pulp-chamber

Law of the CEJ: The CEJ is the most consistent, repeatable landmark for locating the position of the pulp chamber.

Laws of a relationship of the pulp chamber to orifices:

Law of symmetry 1: except for maxillary molars, the orifices of the canals are equidistant from a line drawn in a mesial-distal direction through the pulp-chamber floor.

orifice-of-canals-1

Law of symmetry 2: except for the maxillary molars, the orifices of the canals lie on a line perpendicular to a line drawn in a mesial-distal direction across the center of the floor of the pulp chamber.

floor-of-the-pulp-chamber-1

Law of Color Change: the color of the pulp-chamber floor is always darker than the walls.

colour-of-the-pulp-chamber-1

Law of orifice location 1: the orifices of the root canals are always located at the junction of the walls and the floor.

orifices-of-canals-junction-and-wall-1

Law of orifice location 2: the orifices of the root canals are located at the angles in the floor-wall junction.

orifices-of-canals-angles

Law of orifice location 3: the orifices of the root canals are located at the terminus of the root developmental fusion lines.

orifices-of-canals-terminus-1

All the laws described previously are gathered in the following pictures:

orifices-of-root-canals-1

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  • Aayushi

    What is the cost of root canal treatment in mumbai?

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