Evaluation of rotary file system (Kedo-S-Square) in root canal preparation of primary anterior teeth using cone beam computed tomography (CBCT)-in vitro study

Table 1 Comparison of percent reduction in Dentin thickness among three files at different levels

Percent reduction (mm)		Kedo-S square file (n = 20)	K-file (n = 20)	H-file (n = 20)	H test (P value)
3 mm	Mean ± SD	12.79 (6.60)	19.09 (6.70)	20.92 (6.85)	12.843 *(0.002)**
3 mm	Median (IQR)	14.02 (12.80)^a	19.77 (9.42)^b	21.51 (8.88)^b	12.843 *(0.002)**
6 mm	Mean ± SD	13.41 (7.11)	17.76 (8.79)	16.60 (4.09)	5.120 (0.077)
6 mm	Median (IQR)	12.75 (8.65)	15.71 (4.90)	16.34 (4.49)	5.120 (0.077)
9 mm	Mean ± SD	11.96 (7.27)	14.46 (5.62)	16.31 (4.19)	8.554 *(0.014)**
9 mm	Median (IQR)	10.84 (9.78)^a	13.85 (7.56)^ab	16.90 (6.41)^b	8.554 *(0.014)**

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