Economides N, Koulaouzidou E A, Beltes P, Kortsaris A H
Department of Endodontology, Dental School, Aristotle University Thessaloniki, Greece.
J Endod. 1999 Jul;25(7):481-2. doi: 10.1016/S0099-2399(99)80285-4.
In endodontic practice, calcium hydroxide is widely used for a number of reasons associated with its high pH. The purpose of the present study was to determine in vitro the alkalizing potential of newly introduced calcium hydroxide gutta-percha points that are proposed for temporary filling of root canals. The materials tested were: calcium hydroxide gutta-percha points; chemical pure calcium hydroxide powder mixed with distilled water; and Reogan rapid, a nonsetting calcium hydroxide preparation. The materials were placed into dialysis tubing and transferred into plastic vials containing bidistilled water. Measurements were taken by a digital pH meter after 10, 20, and 30 s; 1, 15, and 30 min; and 1, 2, 3, 24, 48, 72, 96, and 120 h. The calcium hydroxide containing gutta-percha points showed a significantly lower alkalizing potential than Reogan rapid and calcium hydroxide mixed with distilled water (p < 0.05).
在牙髓病治疗实践中，氢氧化钙因其高pH值而被广泛应用于多种情况。本研究的目的是在体外测定新推出的用于根管临时充填的氢氧化钙牙胶尖的碱化潜力。测试的材料有：氢氧化钙牙胶尖；化学纯氢氧化钙粉末与蒸馏水混合；以及Reogan rapid，一种非凝固性氢氧化钙制剂。将这些材料放入透析袋中，转移到装有双蒸水的塑料小瓶中。在10、20和30秒；1、15和30分钟；以及1、2、3、24、48、72、96和120小时后，用数字pH计进行测量。含氢氧化钙的牙胶尖显示出比Reogan rapid和与蒸馏水混合的氢氧化钙显著更低的碱化潜力（p < 0.05）。
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