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 […]

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

Share & be a Hero!

I hope that this article has provided you useful insights about your oral hygiene and dental health. Share this knowledge with your friends and family and be the one to brighten their lives!

Facebook
LinkedIn
WhatsApp
Pinterest
Twitter

One thought on “Endodontics- Root canal

  • Aayushi

    What is the cost of root canal treatment in mumbai?

Your email address will not be published. Required fields are marked *

Talk to a
Dentist Now!
Click to Call