Table 1. The mean and standard deviation values for the time to fracture (TTF) in seconds and the length (mm) of the detached fragments (LDF) of the tested instruments .

	TTF	LDF
VDW.rotate	134.7±9.7a	4.59±0.05a
VDW.rotate (rec)	384.4±24.1b	4.58±0.04a
Reciproc Blue	407.3±29.3c	5.92±0.11b

Different superscript letters indicate a statistically significant difference (P<0.05).