Evaluation of Manual and Two-Rotary Niti Retreatment Systems in Removing Gutta-Percha Obturated with Two Root Canal Sealers

Table 1

Mean scores (SD) of canal wall cleanliness evaluated by means of OSM analysis for the different groups at the coronal, middle, and apical portions.

Groups	Coronal 3rd		Middle 3rd		Apical 3rd
	Mean	SD	Mean	SD	Mean	SD
Group 1	0.4	0.51	0.7	0.67	1	0.66
Group 2	0.7	0.48	1.2	0.63	1.6	0.63
Group 3	0.4	0.51	1.1	0.56	1.8	0.69
Group 4	0.5	0.52	0.8	0.63	1	0.66
Group 5	0.8	0.42	1.3	0.67	1.6	0.63
Group 6	0.6	0.51	1.2	0.63	1.8	0.69