Rajnics Zsolt, Pammer Dávid, Kőnig-Péter Anikó, Turzó Kinga, Marada Gyula, Radnai Márta
Faculty of Medicine, Dental School, University of Pécs, 7623 Pécs, Hungary.
Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, 1111 Budapest, Hungary.
Materials (Basel). 2024 Mar 25;17(7):1492. doi: 10.3390/ma17071492.
(1) Background: The retention of intraradicular posts is an important factor for the prognosis of endodontically treated teeth. The purpose of this study was to evaluate the push-out bond strength (PBS) of the posts relating to their diameter and region of the root. (2) Methods: A total of 40 premolar teeth (decoronated and root canal-filled) were divided into four groups (n = 10). After post-space preparation, different sizes (1.0, 1.2, 1.5, and 2.0 mm) of glass fiber posts were luted with resin cement into the root canals. After placement, 2 mm thick slices were cut from the roots according to their apical, middle, and coronal regions (n = 116). Push-out tests were carried out in a universal testing machine on each slice. A statistical evaluation of the data was applied. (3) Results: When comparing the diameter, the 2.0 mm posts had the highest PBS (111.99 ± 10.40 N), while the 1.0 mm posts had the lowest PBS (99.98 ± 8.05 N). Divided by the surface of the bonded area, the average PBS value was the highest for the 1.0 mm posts (18.20 ± 1.67 MPa) and the lowest for the 2.0 mm posts (12.08 ± 1.05 MPa). (4) Conclusions: Within the limitations of the study, when comparing the regions of the roots, no significant differences were found among the PBS values of the three regions ( = 0.219). When comparing the diameters, significant differences were shown between the PBS values of the four groups ( = 0.023 and = 0.003, respectively).
(1) 背景：根管内桩的固位是根管治疗后牙齿预后的重要因素。本研究的目的是评估桩的推出粘结强度（PBS）与其直径和牙根区域的关系。(2) 方法：将40颗前磨牙（去冠并根管充填）分为四组（n = 10）。在制备桩道后，将不同尺寸（1.0、1.2、1.5和2.0 mm）的玻璃纤维桩用树脂粘结剂粘结到根管内。放置后，根据牙根的根尖、中部和冠部区域从牙根上切下2 mm厚的切片（n = 116）。在万能试验机上对每个切片进行推出试验。对数据进行统计学评估。(3) 结果：比较直径时，2.0 mm的桩具有最高的PBS（111.99 ± 10.40 N），而1.0 mm的桩具有最低的PBS（99.98 ± 8.05 N）。按粘结面积表面划分，1.0 mm的桩平均PBS值最高（18.20 ± 1.67 MPa），2.0 mm的桩最低（12.08 ± 1.05 MPa）。(4) 结论：在本研究的局限性内，比较牙根区域时，三个区域的PBS值之间未发现显著差异（ = 0.219）。比较直径时，四组的PBS值之间显示出显著差异（分别为 = 0.023和 = 0.003）。
