Absorption of Nickel, Chromium, and Iron by the Root Surface of Primary Molars Covered with Stainless Steel Crowns

Table 1

The quantity (in mlwt%) of Ni, Cr, and Fe in the cementum of the mesial root of primary molars.

		Ni			Cr			Fe
	SSC	Intact	P	SSC	Intact	P	SSC	Intact	P
Mean	0.86	0.16	<.0001	0.59	0.11	<.0001	1.13	0.20	<.0001
N	17	17		17	17		17	17
SD	0.42	0.10		0.37	0.07		0.77	0.13
Min	0.40	0.00		0.20	0.00		0.40	0.00
Max	1.50	0.30		1.70	0.20		2.70	0.40

Note. SSC: molars covered with stainless steel crowns, Intact: intact molars, P: P value, N: number of molars examined, and SD: standard deviation.