Fráter Márk, Forster András, Jantyik Ádám, Braunitzer Gábor, Nagy Katalin, Grandini Simone
Department of Operative and Esthetic Dentistry, Faculty of Dentistry, University of Szeged, Szeged, Hungary.
Department of Oral Surgery, Faculty of Dentistry, University of Szeged, Szeged, Hungary.
Aust Endod J. 2017 Apr;43(1):16-22. doi: 10.1111/aej.12150. Epub 2016 May 6.
The purpose of this study was to evaluate the reinforcing effect of fibre-reinforced composites (FRC) applied in premolar teeth with different techniques and minimally invasive post space preparation. Fifty extracted and endodontically treated premolar teeth were used. The teeth were divided into five groups (n = 10) depending on the restorative technique (Groups 1-5). Group 1: one single conventional post, Group 2: one main conventional and one collateral post, Group 3: one elastic post, Group 4: one main elastic and one collateral post, and Group 5: individual post formed of elastic posts. After cementation and core build-up, the specimens were submitted to static fracture resistance test. Fracture thresholds and fracture patterns were measured and evaluated. Group 4 showed the highest average fracture resistance among the tested groups. The multi-post techniques (group 2 and 4) exhibited statistically higher fracture resistance compared to group 1. Regarding fracture patterns, there was no statistically significant difference between the tested groups. Within the limitations of this study, the application of multiple elastic or conventional FRC posts or a single elastic post in the same root canal is beneficial in terms of fracture resistance compared to a single conventional FRC post. The elasticity or the number of posts did not influence the fracture patterns.
本研究的目的是评估采用不同技术及微创桩道预备的纤维增强复合材料（FRC）应用于前磨牙时的增强效果。使用了50颗拔除并经过根管治疗的前磨牙。根据修复技术将牙齿分为五组（n = 10）（第1 - 5组）。第1组：一根单一的传统桩；第2组：一根主要的传统桩和一根副桩；第3组：一根弹性桩；第4组：一根主要的弹性桩和一根副桩；第5组：由弹性桩组成的个体化桩。粘结和核修复后，对标本进行静态抗折试验。测量并评估折裂阈值和折裂模式。第4组在测试组中显示出最高的平均抗折强度。与第1组相比，多桩技术（第2组和第4组）在统计学上表现出更高的抗折强度。关于折裂模式，测试组之间在统计学上没有显著差异。在本研究的局限性范围内，与单一传统FRC桩相比，在同一根管内应用多个弹性或传统FRC桩或单一弹性桩在抗折方面是有益的。桩的弹性或数量不影响折裂模式。
