Newman S M
J Prosthet Dent. 1980 Jan;43(1):46-9. doi: 10.1016/0022-3913(80)90352-2.
The technique for handling zinc phosphate cement can be altered to achieve enhanced properties of the cement. The compressive strength of the material can be decreased. The film thickness can be maintained within acceptable limits, and the possibility of pulpal damage can be kept low by maintaining temperature changes in the cement similar to those obtained from a room temperature-slab technique. The technique advocated by this report is as follows: 1. Store the aluminum slab with vinyl covering in a freezer at -15 degrees C to -20 degrees C in a plastic bag to prevent ice formation on the surface. 2. Remove the slab when ready to mix. 3. Quickly wipe the slab clean. 4. Dispense twice as much powder and liquid as recommended on the slab. 5. Start timer. 6. Slowly incorporate the powder into the liquid over a large area of the slab for 2 minutes. 7. Allow the mix to remain on the slab. 8. The instrument for placing the cement can be placed under the slab. The casting can be placed on a corner of the slab. 9. At 10 minutes, place the cement into the casting(s) and seat. 10. Remove excess cement. 11. Clean the slab by rinsing in water and gently wiping. 12. Dry the slab, place it in the plastic bag, and return it to the freezer.
处理磷酸锌水门汀的技术可以改变，以提高水门汀的性能。材料的抗压强度可以降低。薄膜厚度可以保持在可接受的限度内，并且通过保持水门汀中的温度变化与室温平板技术获得的温度变化相似，可以将牙髓损伤的可能性保持在较低水平。本报告所倡导的技术如下：1. 将带有乙烯基覆盖物的铝板放在塑料袋中，在-15摄氏度至-20摄氏度的冰箱中储存，以防止表面结冰。2. 准备混合时取出平板。3. 快速擦拭平板使其干净。4. 在平板上按推荐量的两倍 dispense 粉末和液体。5. 启动计时器。6. 在平板的大面积上，将粉末缓慢加入液体中，持续2分钟。7. 让混合物留在平板上。8. 放置水门汀的器械可以放在平板下面。铸件可以放在平板的一个角上。9. 10分钟时，将水门汀放入铸件中并就位。10. 去除多余的水门汀。11. 用水冲洗并轻轻擦拭来清洁平板。12. 干燥平板，放入塑料袋中，再放回冰箱。 （注：“dispense”此处似有误，结合语境可能是“量取”之类意思，但按要求未作更改）
