| 摘要 |
For the purpose to preserve hydrogen peroxide stably for a long period of time, have excellent adhesion with keeping viscosity at about same level as that of the conventional material, give few damages to a tooth by pH, and have high efficiency of bleaching to tooth, a pasty dental bleaching material comprises 10-50 wt. % powdery hydrogen peroxide polyvinyl pyrrolidone complex blended in a liquid component, or comprises pasty first and second components, 10-50 wt. % powdery hydrogen peroxide polyvinyl pyrrolidone complex being blended in a liquid component in the first component and 0.01-10 wt. % catalyst for activating hydrogen peroxide and 1-70 wt. % thickener being blended in a liquid component in the second component.
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