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. 2021 Jul 19;62(8):767–775. doi: 10.3349/ymj.2021.62.8.767

Table 2. Concentrations of Metal Ions [Parts Per Billion (ppb)] in Saliva.

Metal ion HCwoOP (n=30) HCwOP (n=41) OLLwOP (n=107) OLLwoOP (n=5) p value
Ti 444.37 (375.04) 607.10 (450.16) 628.99 (507.08) 1154.20 (469.70) 0.484
Cr 7.96 (7.68) 8.36 (7.28) 8.16 (7.18) 10.25 (10.40) 0.556
Co 0.31 (0.00) 0.24 (0.00) 0.51 (0.00) 0.84 (1.01) 0.161
Ni 7.89 (7.95) 7.55 (6.53) 14.11 (8.33) 25.50 (16.61) 0.023*
Zr 0.28 (0.00) 0.03 (0.00) 0.38 (0.00) 0.00 (0.00) 0.437
Pd 3.18 (1.77) 5.73 (2.13) 1.97 (0.00) 0.27 (0.00) 0.014*
Ag 0.00 (0.00) 1.22 (0.00) 1.36 (0.00) 0.00 (0.00) 0.008
Pt 0.00 (0.00) 0.17 (0.00) 0.28 (0.00) 0.00 (0.00) 0.775
Au 25.53 (17.38) 65.50 (5.36) 13.34 (3.81) 0.00 (0.00) <0.001

HCwoOP, healthy control without oral prosthesis; HCwOP, healthy control with oral prosthesis; OLLwOP, oral lichenoid lesion with oral prosthesis; OLLwoOP, oral lichenoid lesion without oral prosthesis; Ti, titanium; Cr, chromium; Co, cobalt; Ni, nickel; Zr, zirconium; Pd, palladium; Ag, silver; Pt, platinum; Au, gold; IQR, interquartile range.

Data are shown as the median (IQR); p values were obtained by one-way Kruskal-Wallis.

*p<0.05, p<0.01, Ni was investigated in 97 out of 107 OLLwOP patients, and 10 patients were not analyzed.

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