Whitening Effect of Juglans regia Dry Husk Extract on Primary and Permanent Teeth

Table 1

Statistical test for the change in all colour variables (L, A, B, C, and H) in primary teeth.

Colour variables	Mean rank (pumice group)	Z (pumice group)	value (pumice group)	Mean rank (Juglans regia group)	Z (Juglans regia group)	value (Juglans regia group)
L	4.63	0.474	0.635	5.89	2.599
A	6.11	2.670		6.07	1.530	0.126
B	6.00	0.357	0.635	5.50	1.683	0.092
C	6.75	1.068	0.721	5.57	1.172	0.241
H	5.71	1.068	0.285	7.05	1.173	0.242