Evaluation of Dentin Defect Formation during Retreatment with Hand and Rotary Instruments: A Micro-CT Study

Table 2

Distribution of dentin defects post-gutta-percha removal according to the apical, middle, and coronal portions of the roots.

	Apical	Middle	Coronal
Group 1
Craze line	18	26	3
Partial crack	1	0	0
Fracture	2	2	0
Total defects	21	28	3
Group 2
Craze line	7	7	3
Partial crack	1	0	0
Fracture	1	1	1
Total defects	9	8	4