Objective To evaluate if physical and mechanical properties of self-curing calcium hydroxide cements were affected by contact with polyacrylic and phosphoric acids. Materials and Methods Resin-containing (Life (LF)) and resin-free (Hydro C (HyC)) materials were subjected to polyacrylic acid conditioning and rinsing (POL); phosphoric acid conditioning and rinsing (PHO); rinsing only; and no treatment (n = 10). Water sorption/solubility, release of hydroxyl ions (pH), roughness (Ra), and impact resistance were evaluated. Additional samples (n = 1) were prepared for scanning electron microscopy (SEM) analysis of the surface morphology. Data were analyzed by two-way ANOVA and Tukey post hoc test (P < 0.05). Results Water sorption was significantly higher for LF when in contact with PHO and lower for POL (P < 0.05). The mean solubility was higher with POL for both cements (P < 0.05). PHO increased the mean surface roughness for HyC (P < 0.01); a significant decrease was noted for LF after contact with both acids (P < 0.01). PHO promoted lower release of hydroxyl ions on both cements (P < 0.05). For LF, rinsing, PHO, and POL presented similar morphology, differing from the control group. For HyC, PHO and POL presented similar morphology, differing from the control group. Conclusions PHO had a negative effect on the physical properties of the cements tested, except for the solubility test. POL affected roughness and solubility of HyC cement. Clinical Relevance Clinical procedures that require polyacrylic and phosphoric acid conditioning must be done carefully on self-curing calcium hydroxide cements in order to avoid negative impact on their properties.

中文翻译：

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暴露于聚丙烯酸和磷酸的钙水泥的物理机械性能和微观形貌

目的评价自固化氢氧化钙水泥的物理力学性能是否会因接触聚丙烯酸和磷酸而受到影响。材料和方法 对含树脂（Life (LF)）和不含树脂（Hydro C (HyC)）的材料进行聚丙烯酸调理和漂洗（POL）；磷酸调理和冲洗（PHO）；仅冲洗；并且没有治疗（n = 10）。评估了水的吸附/溶解度、羟基离子的释放 (pH)、粗糙度 (Ra) 和抗冲击性。准备额外的样品 (n = 1) 用于表面形态的扫描电子显微镜 (SEM) 分析。数据采用双向方差分析和 Tukey 事后检验 (P < 0.05)。结果 LF 与 PHO 接触时的吸水率显着较高，而 POL 的吸水率较低（P < 0.05）。两种水泥的平均溶解度均较高（P < 0.05）。PHO 增加了 HyC 的平均表面粗糙度（P < 0.01）；与两种酸接触后，LF 显着降低（P < 0.01）。PHO 促进了两种水泥中氢氧根离子的释放（P < 0.05）。对于 LF，漂洗、PHO 和 POL 呈现出相似的形态，与对照组不同。对于 HyC，PHO 和 POL 呈现出相似的形态，与对照组不同。结论除溶解度测试外，PHO对测试水泥的物理性能有负面影响。POL影响HyC水泥的粗糙度和溶解度。