Kanzler Abdel Raouf Valérie, Jockusch Julia, Al-Haj Husain Nadin, Dydyk Nataliya, Özcan Mutlu
Division of Dental Biomaterials, Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland.
University Research Priority Program Dynamics of Healthy Aging", University of Zurich, 8050 Zurich, Switzerland.
Materials (Basel). 2022 Jul 24;15(15):5134. doi: 10.3390/ma15155134.
This study assessed the bond strength of prefabricated post systems at different root levels of endodontically treated teeth. One-rooted human premolars (N = 70; n = 10) were cut to 2 mm above the cement-enamel junction. Root canals were treated and randomly assigned to one of the seven post systems: T: Titanium (Mooser), ZrO: Zirconia (Cosmopost), G: Fiber (FRC Postec Plus), E1: Fiber (Direct) (Everstick post), E2: Fiber (Indirect) (Everstick post), PP: Fiber (PinPost), and LP: Injectable Resin/Fiber composite (EverX Posterior). All posts were luted using a resin cement (Variolink II), and the roots were sectioned at the coronal, middle, and apical root levels. Push-out tests were performed in the Universal Testing Machine (0.5 mm/min). Data (MPa) were analyzed using two-way ANOVA and Tukey's tests (α = 0.05). The results showed that the bond strength (mean ± SD) of E2 posts were highest (5.3 ± 2.7) followed by PP (4.1 ± 2.0); G (4.0 ± 1.6); LP (2.6 ± 1.9): T (2.2 ± 1.5) and ZrO (1.9 ± 1.0) posts systems. No significant differences were found in bond strength of all post systems. The bond strength in the coronal root level was the highest with 3.6 ± 2.2 MPa. The bond strength of FRC post systems was significantly higher than those of rigid posts of titanium or ZrO. Bond strength results were the highest in the coronal root level for all tested post systems but did not differ significantly from the other two root levels.
本研究评估了根管治疗后牙齿不同牙根水平处预制桩系统的粘结强度。将单根人前磨牙（N = 70；n = 10）在牙骨质-釉质界上方2 mm处截断。对根管进行治疗，并随机分配到七种桩系统之一：T：钛（Mooser）；ZrO：氧化锆（Cosmopost）；G：纤维（FRC Postec Plus）；E1：纤维（直接）（Everstick桩）；E2：纤维（间接）（Everstick桩）；PP：纤维（PinPost）；LP：可注射树脂/纤维复合材料（EverX Posterior）。所有桩均使用树脂水门汀（Variolink II）粘结，然后在牙根的冠部、中部和根尖水平进行切片。在万能材料试验机中进行推出试验（0.5 mm/分钟）。使用双向方差分析和Tukey检验（α = 0.05）对数据（MPa）进行分析。结果显示，E2桩的粘结强度（平均值±标准差）最高（5.3±2.7），其次是PP（4.1±2.0）；G（4.0±1.6）；LP（2.6±1.9）；T（2.2±1.5）和ZrO（1.9±1.0）桩系统。所有桩系统的粘结强度均未发现显著差异。冠部牙根水平的粘结强度最高，为3.6±2.2 MPa。纤维增强复合材料桩系统的粘结强度显著高于钛或氧化锆刚性桩。所有测试桩系统的粘结强度结果在冠部牙根水平最高，但与其他两个牙根水平相比无显著差异。
