. 2017 Fall;12(4):468–473. doi: 10.22037/iej.v12i4.17494

Table 2.

Mean values and Standard Deviation of the Preparation time (sec), the number of cycles for each instrumentation (NCI), Time to instruments failure(sec), the number of cycles to failure (NCF) and the sum of NCI and NCF (n=10

	Preparation time	NCI	Time to failure	NCF	NCI+NCF
PDL	64.55 (5.04)^a	376.59 (29.43)	182.07 (94.42)^b	910.37 (472.10)^b	1286.96 (488.40)^b
PDR	102.65 (58.71)^b	513.28 (293.57)	152.38 (97.95)^b	761.93 (489.75)^b	1275.21 (685.86)^b
WOG	96.72 (25.71)^b	483.61 (128.57)	52.95 (61.08)^a	264.76 (305.42)^a	748.37 (364.31)^a

There were statistical differences between groups and were marked with different letters in the table