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.