Prakasam S, Bharadwaj Prakasam, Loganathan S C, Prasanth B Krishna
Department of Prosthodontics, Sree Balaji Dental College and Hospital, Chennai, India.
Indian J Dent Res. 2014 Jan-Feb;25(1):73-7. doi: 10.4103/0970-9290.131135.
The purpose of this study is to evaluate the ultimate compressive strength of 50% and 25% Portland cement mixed with Polymer-reinforced zinc oxide eugenol and zinc oxide eugenol cement after 1 hour, 24 hours, and 7 days.
One hundred and eighty samples were selected. The samples were made cylindrical of size 6 × 8 mm and were divided into six groups as follows with each group consisting of 10 samples. Group 1: Polymer-reinforced zinc oxide eugenol with 50% Portland cement (PMZNPC 50%) Group 2: Polymer-reinforced zinc oxide eugenol with 25% Portland cement (PMZNPC 25%) Group 3: Polymer-reinforced zinc oxide eugenol with 0% Portland cement (PMZNPC 0%) Group 4: Zinc oxide eugenol with 50% Portland cement (ZNPC 50%) Group 5: Zinc oxide eugenol with 25% Portland cement (ZNPC 25%) Group 6: Zinc oxide eugenol with 0% Portland cement (ZNPC 0%) These samples were further subdivided based on time interval and were tested at 1 hour, 24 hours and at 7 th day. After each period of time all the specimens were tested by vertical CVR loaded frame with capacity of 5 tones/0473-10kan National Physical laboratory, New Delhi and the results were statistically analyzed using ANOVA and Scheffe test.
Polymer-reinforced cement with 50% Portland cement, Zinc oxide with 50% Portland cement, Polymer-reinforced cement with 25% Portland cement and Zinc oxide with 25% Portland cement exhibited higher compressive strength when compared to Zinc oxide with 0% Portland cement and Polymer-reinforced cement with 0% Portland cement, at different periods of time. The difference between these two groups were statistically significant (P < 0.05) and it is suggested that mixture of 50% and 25% Portland cement in Zinc oxide eugenol and Polymer-modified zinc oxide cement can be used as core build up material and permanent filling material.
It is concluded that 50% and 25% Portland cement in zinc oxide eugenol and polymer-modified zinc oxide eugenol results in higher compressive strength and hence can be used as permanent filling material and core built-up material.
本研究旨在评估50%和25%的波特兰水泥与聚合物增强氧化锌丁香酚和氧化锌丁香酚水泥混合后1小时、24小时和7天的极限抗压强度。
选取180个样本。将样本制成尺寸为6×8毫米的圆柱体，并分为六组，每组10个样本。第1组：含50%波特兰水泥的聚合物增强氧化锌丁香酚（PMZNPC 50%）；第2组：含25%波特兰水泥的聚合物增强氧化锌丁香酚（PMZNPC 25%）；第3组：含0%波特兰水泥的聚合物增强氧化锌丁香酚（PMZNPC 0%）；第4组：含50%波特兰水泥的氧化锌丁香酚（ZNPC 50%）；第5组：含25%波特兰水泥的氧化锌丁香酚（ZNPC 25%）；第6组：含0%波特兰水泥的氧化锌丁香酚（ZNPC 0%）。这些样本根据时间间隔进一步细分，并在1小时、24小时和第7天进行测试。在每个时间段后，所有样本均使用新德里国家物理实验室容量为5吨/0473 - 10kan的垂直CVR加载框架进行测试，并使用方差分析和谢费检验对结果进行统计分析。
与含0%波特兰水泥的氧化锌和含0%波特兰水泥的聚合物增强水泥相比，含50%波特兰水泥的聚合物增强水泥、含50%波特兰水泥的氧化锌、含25%波特兰水泥的聚合物增强水泥和含25%波特兰水泥的氧化锌在不同时间段表现出更高的抗压强度。这两组之间的差异具有统计学意义（P < 0.05），表明在氧化锌丁香酚和聚合物改性氧化锌水泥中混合50%和25%的波特兰水泥可作为核桩材料和永久填充材料。
得出结论，氧化锌丁香酚和聚合物改性氧化锌丁香酚中50%和25%的波特兰水泥可产生更高的抗压强度，因此可作为永久填充材料和核桩材料。
