Assertion: bleach's hydrogen peroxide | /r/HasProperty | 5.50 ± 2.15 units
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Source sentences:
text: The Vita Shade Guide results demonstrated that the groups treated with hydrogen peroxide (5.50 ± 2.15 units) or sodium percarbonate (5.60 ± 1.84 units) presented the greatest color change, while the CP (3.8 ± 1.8 units) and urea (4.37 ± 1.89 units) groups did not lighten the color of teeth significantly after two weeks of bleaching regimen.20