Real-time co-site optical microscopy study on the morphological changes of the dentine’s surface after citric acid and sodium hypochlorite: a single-tooth model

Table 1 Statistical tests used to calculate the significance of the differences between both experimental groups

Test used	Parameter tested	Stage 1 Gr 1 vs Gr 2		Stage 2 Gr 1 vs Gr 2		Stage 3 Gr 1 vs Gr 2		Stage 4 Gr 1 vs Gr 2		Stage 3 Gr 1 vs Stage 1 Gr 2
Test used	Parameter tested	p	Z	p	Z	p	Z	p	Z	p	Z
Sign test	Changes of the diameters of dentine tubules	0.0044	2.846	0.0044	2.846	0.0044	2.846	0.0044	2.846
Mann–Whitney U	Changes of the diameters of dentine tubules									0.00	− 3.743
Mann–Whitney U	Smear layer removal efficiency	0.143	1.629	0.393	0.981	0.739	0.453	1.00	− 0.073	0.024	2.258
Kruskal–Wallis	Smear layer removal efficiency	0.131		0.364		0.705		1.00

ISSN: 1472-6831