Mathematical validation of measurement of root fracture resistance: an in vitro study

BMC Oral Health

Table 1 Mean values ± standard deviation (SD) of fracture loads of the roots (FL), fracture resistance (FR) and natural logarithm of FR (Ln/FR)

Instrumentation methods	n	FL (N)	FR, (MPa)	Ln/FR
Control	20	410.16 ± 80^A	2177.47 ± 348^A	8.15 ± 0.17^A
M2	20	348.13 ± 96 ^A	376.89 ± 101^B	5.89 ± 0.27 ^B
PTN	20	387.75 ± 144^A	338.68 ± 112^B	5.77 ± 0.34 ^B
SS File	20	317.45 ± 86 ^A	355.98 ± 96^B	5.83 ± 0.26 ^B
P value*		0.171	< 0.001	< 0.001

ISSN: 1472-6831