Jost-Brinkmann P G, Rabe H, Miethke R R
Fortschr Kieferorthop. 1989 Feb;50(1):1-11. doi: 10.1007/BF02166845.
Two of the zinc phosphate cements commonly used in orthodontics were mixed, with special attention being paid to the longest possible working time, and examined by scientific methods. The results showed that mixing should generally be carried out on frozen slabs (-18 degrees C to -24 degrees C) and for not longer than 5 min. If a maximum compressive strength is required, mixing should be done at refrigerator temperature (+4 degrees C to +8 degrees C) for no more than 1.5 min by accepting a shorter working time. Neither cement shows any notable physicochemical differences, as regards the material.
将正畸中常用的两种磷酸锌水门汀进行混合，特别注意尽可能延长其工作时间，并采用科学方法进行检测。结果表明，混合操作通常应在冷冻板（-18℃至-24℃）上进行，且混合时间不得超过5分钟。如果需要最大抗压强度，则应在冰箱温度（+4℃至+8℃）下混合，混合时间不超过1.5分钟，不过这样工作时间会缩短。就材料而言，这两种水门汀均未显示出任何显著的物理化学差异。
