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. 2021 Jan 29;9:e10606. doi: 10.7717/peerj.10606

Table 2. The chemical composition of dental enamel was analyzed in all groups using EDS. The results showed low alterations in the levels of chemical constituents.

Variations of the concentration values by weight (%) of the chemical elements observed by means (S.D.) of Spectroscopy of Dispersion of Ray-x (EDS) of dental enamel submitted to different bleaching agents.

CTRL G1 G2 G3 CONV
O 30.41 (8.18) 42.48 (4.77) 35.27 (15.64) 38.85 (5.38) 42.30 (3.27)
F 0.59 (0.36) 0.94 (1.13) 0.52 (0.49) 0.31 (0.16) 0.37 (0.10)
Na 0.60 (0.28) 0.94 (0.08) 19.03 (0.60) 19.19 (0.19) 1.00 (0.10)
P 20.81 (0.91) 18.34 (1.65) 19.03 (1.68) 19.19 (1.14) 18.23 (0.70)
Cl 0.56 (0.03) 0.50 (0.08) 0.55 (0.13) 0.52 (0.04) 0.61 (0.02)
Ca 47.03 (7.92) 36.80 (4.06) 43.78 (14.91) 40.33 (4.31) 37.49 (2.71)