Evaluation of Dentinal Microcracks following Diode Laser- and Ultrasonic-Activated Removal of Bioceramic Material during Root Canal Retreatment

Table 1

Percentage of dentinal defects before and after retreatment procedures.

Irrigation protocol	Percentage of cracks %
	Preinstrumentation	Postinstrumentation	Postmechanical retreatment	Postirrigation protocol
Control	13.88	13.90	49.30	49.90
Ultrasonic	33.76	55.08	68.88	68.95
Laser	0.01	0.33	53.60	57.50