| 摘要 |
<p>Toothpaste Prepd. from ZrSO4 with particle size of less than 8u, pref. a mixture of sizes such as 0-3 u, (80-95%); 3-5 mu, (0-15%); and 5-8 mu, (0.12%), which is dispersed in a mixture of Ca2P2O7, CaHPO4, CaHPO42H2O, a high polymer resin such as melamine-formaldehyde, insoluble sodium metaphosphate, CaCO3, talc and tremolite, together with disinfectants and fluorides. The new product is a valuable aid to dental cleansing and polishing.</p> |
