A Digital Microscopic Inspection of Dentinal Defects after Using Endodontic Retreatment Files

Table 1

Nomenclature and description of specimen categories.

Type	Name	Description
A	No defect	Root dentin devoid of any lines or cracks and where both the external surface of the root and the internal root canal wall had no defects
B	Fracture	A line extending from the root canal space to the outer surface of the root
C	Partial crack	A line extending from the canal walls into the dentin without reaching the outer surface.
D	Craze line	A line extending from the outer surface into the dentin but that did not reach the canal lumen