Mayya Arun, Naik Rajaram, Mayya Shreemathi S, Paul Maria P
Department of Conservative Dentistry and Endodontics, A.J. Institute of Dental Sciences, Mangalore, India.
Department of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, Karnataka, India.
J Int Soc Prev Community Dent. 2020 Apr 20;10(2):183-184. doi: 10.4103/jispcd.JISPCD_472_19. eCollection 2020 Mar-Apr.
The aim of this study was to determine if there is any difference in fracture resistance between different post sizes and lengths when more than one post is involved.
Thirty extracted maxillary first premolars were endodontically treated and divided into three groups: In Group 1 (control group), no post space preparation was conducted and access cavities were restored with composite; in Group 2 (single post), post space preparation of 10 mm was carried out only in one of the canals; and in Group 3 (double post), post space preparation of 5 mm was conducted in both the canals. Appropriately sized glass fiber posts were cemented in Groups 2 and 3 followed by core buildup. The fracture resistance of the specimen was measured using a universal testing machine and the data analyzed. The mean fracture resistance values of the three groups were compared applying one-way analysis of variance (ANOVA) followed by Tukey's test. The data were analyzed using Statistical Package for the Social Sciences software program, version 15.0. South Asia, Bangalore.
The control group had a significantly lower fracture resistance value as compared to Groups 2 and 3. No statistically significant difference was observed in the fracture resistance between Groups 2 and 3.
No significant difference was observed between the fracture resistance of endodontically treated maxillary first premolars restored with size 3 single post of longer length and size 1 double posts of shorter lengths.
本研究的目的是确定当涉及多个桩时，不同桩的尺寸和长度在抗折性方面是否存在差异。
选取30颗拔除的上颌第一前磨牙进行根管治疗，并分为三组：第1组（对照组），不进行桩道预备，用复合树脂修复髓腔；第2组（单桩组），仅在其中一个根管内进行10 mm的桩道预备；第3组（双桩组），在两个根管内均进行5 mm的桩道预备。在第2组和第3组中粘结合适尺寸的玻璃纤维桩，随后进行核桩修复。使用万能试验机测量标本的抗折性并分析数据。应用单因素方差分析（ANOVA）及Tukey检验比较三组的平均抗折性值。使用社会科学统计软件包程序版本15.0（印度班加罗尔南亚）分析数据。
与第2组和第3组相比，对照组的抗折性值显著更低。第2组和第3组之间在抗折性方面未观察到统计学上的显著差异。
用较长的3号单桩和较短的1号双桩修复的根管治疗后的上颌第一前磨牙，其抗折性之间未观察到显著差异。
