Kaplan A E, Goldberg F, Artaza L P, de Silvio A, Macchi R L
Department of Dental Materials, School of Dentistry, University of Buenos Aires, Argentina.
J Endod. 1997 Jul;23(7):439-41. doi: 10.1016/S0099-2399(97)80298-1.
The disintegration of three endodontic cements in water was determined quantitatively and qualitatively. The materials studied were Ketac-Endo (KE), Tubli Seal (TS), and AH26 (AH). Specimens were immersed in water for 48 h (GI), 7 (GII) and 45 days (GIII). The solid residue was then determined. For the qualitative analysis three groups of tubes were filled with the materials and stored in water for the same periods. The exposed surface was photographed. Results expressed as percentage of original mass in the quantitative analysis for loss of mass due to dissolution were: GI = KE 2.39 (0.70); TS 3.56 (0.37); AH 4.94 (2.83); GII = KE 2.84 (0.30); TS 2.50 (0.50); AH 0.66 (0.26); GIII = KE 1.60 (0.84); TS 1.03 (0.42); AH 1.22 (0.54). Tukey's least significant difference (0.05) was 2.94. In the qualitative experiment KE disintegration was far more evident than that suffered by other materials. The quantitative results had no correlation with the qualitative observations probably due to the difference in the moment when the materials were immersed.
对三种根管黏固剂在水中的分解情况进行了定量和定性测定。所研究的材料为Ketac-Endo（KE）、Tubli Seal（TS）和AH26（AH）。将样本分别浸泡在水中48小时（组I）、7天（组II）和45天（组III）。然后测定固体残余物。为进行定性分析，将三组试管装满材料并在水中保存相同时间。对暴露的表面进行拍照。在因溶解导致质量损失的定量分析中，结果以原始质量的百分比表示为：组I = KE 2.39（0.70）；TS 3.56（0.37）；AH 4.94（2.83）；组II = KE 2.84（0.30）；TS 2.50（0.50）；AH 0.66（0.26）；组III = KE 1.60（0.84）；TS 1.03（0.42）；AH 1.22（0.54）。Tukey最小显著差（0.05）为2.94。在定性实验中，KE的分解比其他材料明显得多。定量结果与定性观察结果不相关，这可能是由于材料浸泡时刻的差异所致。
