TABLE 1.

The mean, standard deviation (SD) and P-values of percentage of the remaining root canal filling materials of different groups in all thirds

Variables	Remaining filling material %
	Coronal		Middle		Apical		P	Total
	Mean	SD	Mean	SD	Mean	SD		Mean	SD
Group1	47.21Cc	8.83	63.28Ba	10.53	74.28Aa	12.67	<0.001*	61.59a	15.41
(G.G+Hand H-files)
Group2	70.04Aa	10.48	61.58Ba	9.04	34.14Cc	6.28	<0.001*	55.25ab	17.71
(D-Race)
Group3	56.59Ab	8.46	54.78Aa	9.19	46.67Bb	9.73	0.016*	52.68b	9.94
(D-Race and XP finisher)
Group4	48.17Abc	9.03	43.83Ab	9.18	32.74Bc	7.00	<0.001*	41.58c	10.56
(D-Race and XP finisher R)
P	<0.001*		<0.001*		<0.001*			<0.001*

*: Indicates significant difference. While different small letters within the same column indicate significant differences among groups, asymmetrical capital letters within the same row indicate significant differences among groups (p<0.05).