Endodontics Flashcards
Law of centrality
The floor of the pulp chamber is always located in the center of the tooth at the level of the CEJ
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
Law of the CEJ
The CEJ is the most consistent, repeatable land-mark for locating the position of the pulp chamber
Where are the orifices located?
At the junction of the walls and floor
Law of symmetry 1
Except for maxillary molars, the orifices of the canals are equidistant from a line drawn in a medial distal direction through the pulp chamber floor
Law of symmetry 2
Except for maxillary molars, the orifices of the canals lie on a line perpendicular to a line drawn In a medial-distal direction across the centre of the floor of the pulp
Law of colour change
The colour of the pulp chamber floor is always darker than the walls
Law of orifice location 1
The orifices of the root canals are always located at the junction of the walls and the floor
Law of orifice location 2
The orifices of the root canals are located at the angles in the floor-wall junction
Law of orifice location 3
The orifices of the root canals are located at the terminus of the root developmental fusion lines
