Do Mechanical and Physicochemical Properties of Orthodontic NiTi Wires Remain Stable In Vivo?

Table 2

Results of t-test comparing the average value of nanohardness in groups A and B.

	Group A	Group B
(MPa: mean value SD)
p (intragroup analysis)	0.03258	0.006258
t value	⁢
p (intergroup analysis)	⁢0.00
(GPa: mean value SD)
p (intragroup analysis)		0.00246
t value	⁢
p (intergroup analysis)	⁢

p: the level of significance, t value: the difference coefficient, and SD: standard deviation.