Sobhnamayan Fereshte, Adl Alireza, Farmani Somaye, Shojaee Nooshin Sadat
Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran.
Department of Endodontics, Oral and Dental Disease Research Center, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran.
Iran Endod J. 2019 Winter;14(1):52-55. doi: 10.22037/iej.v14i1.22823.
This study evaluated the effect of propylene glycol (PG) on the push-out bond strength of calcium-enriched mixture (CEM) cement compared to mineral trioxide aggregate (MTA).
The lumens of two hundred 2±0.2 mm-thick root sections from human extracted teeth were prepared to achieve a diameter of 1.3 mm. The samples were then allocated into eight groups of 25 on the basis of the materials used (MTA or CEM cement) and different proportions of PG (0%, 20%, 505, and 100%). In each group, 0.4 mL of the liquid was mixed with 1 g MTA or CEM cement. After incubation, the push-out strength of the samples was measured using a universal testing machine. Data were analyzed using the two-way ANOVA followed by one-way ANOVA and student's -test.
The MTA group showed significantly higher bond strength in comparison with CEM group (≤0.001). Also 100% and 20% PG increased the bond strength of MTA (≤0.001). For CEM cement, 100% and 50% PG decreased the bond strength (≤0.001).
This study demonstrated that while PG increased the push-out bond strength of MTA, it is not recommended for mixing with CEM cement.
本研究评估了与三氧化矿物凝聚体（MTA）相比，丙二醇（PG）对富钙混合物（CEM）水泥推出粘结强度的影响。
从人类拔除的牙齿上制备200个厚度为2±0.2毫米的牙根切片，将其管腔处理成直径为1.3毫米。然后根据所用材料（MTA或CEM水泥）和不同比例的PG（0%、20%、50%和100%）将样本分为八组，每组25个。在每组中，将0.4毫升液体与1克MTA或CEM水泥混合。孵育后，使用万能试验机测量样本的推出强度。数据采用双向方差分析，随后进行单向方差分析和学生t检验。
与CEM组相比，MTA组的粘结强度显著更高（P≤0.001）。此外，100%和20%的PG提高了MTA的粘结强度（P≤0.001）。对于CEM水泥，100%和50%的PG降低了粘结强度（P≤0.001）。
本研究表明，虽然PG提高了MTA的推出粘结强度，但不建议将其与CEM水泥混合使用。
