Nilavarasan Nilavu, Hemalatha R, Vijayakumar R, Hariharan V S
Department of Pedodontics, SRM Dental College, Chennai, Tamil Nadu, India.
Eur J Dent. 2016 Oct-Dec;10(4):464-468. doi: 10.4103/1305-7456.195181.
The objective of our study was to compare the fracture resistance and the mode of failure among three different post materials in primary anterior teeth.
A total of sixty extracted primary anterior teeth were selected for the study. The samples were divided into three groups of twenty teeth each: Group I (Ribbond), Group II (Omega loop), and Group III (Glass fiber post). Pulp therapy was followed by intracanal post and crown buildup. The samples were mounted in self-cure acrylic and subjected to compressive strength test using universal testing machine (Instron). The maximum force at which the tooth fractured was recorded.
The values were subjected to one-way analysis of variance. The mean compressive strength values of Ribbond, omega loop, and glass fiber post were found to be 83.25 N, 61.60 N, and 75.55 N, respectively. The value was found to be 0.220.
Group I (Ribbond) showed the highest fracture resistance values followed by Group III (Glass fiber post) and Group II (Omega loop). Although there is difference in mean values, they were nonsignificant.
本研究的目的是比较三种不同桩材料在乳前牙中的抗折性及折裂模式。
共选取60颗拔除的乳前牙用于本研究。样本被分为三组，每组20颗牙：第一组（Ribbond）、第二组（Omega loop）和第三组（玻璃纤维桩）。根管治疗后进行根管内桩修复及冠修复。样本用自凝丙烯酸树脂固定，并使用万能试验机（英斯特朗）进行抗压强度测试。记录牙齿折裂时的最大力。
对这些数值进行单因素方差分析。发现Ribbond、Omega loop和玻璃纤维桩的平均抗压强度值分别为83.25 N、61.60 N和75.55 N。发现F值为0.220。
第一组（Ribbond）显示出最高的抗折性值，其次是第三组（玻璃纤维桩）和第二组（Omega loop）。虽然平均值存在差异，但差异无统计学意义。
