Endodontics Laws Flashcards
What is the law of centrality?
The floor of the pulp chamber is almost always located in the center of the tooth at the level of the cementoenamel junction
What is the law of cementoenamel junction?
distance from the external surface of the clinical crown to the wall of the pulp chamber is the same through the tooth circumference at the level of the CEJ
What is the law of concentricity?
Walls of the pulp chamber are always concentric to the external surface of the tooth at the level of the CEJ
What does the law of concentricity indicate?
the anatomy of the external tooth surface reflects the anatomy of the pulp chamber
What is the law of colour change?
the colour of the floor of the pulp chamber is darker than the cavity walls
What is the law of symmetry?
The canal orifices are equidistant from a line drawn in a mesiodistal direction through the floor of the pulp chamber
Which teeth are exceptions to the law of symmetry?
maxillary molars
What is the law of orifice location?
canal orifices are located at the junction of the floor, walls and terminus of root development fusion lines
