Department of Dentistry, Pontifical Catholic University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Department of Restorative Dentistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
J Contemp Dent Pract. 2021 Mar 1;22(3):219-223.
This study aims to evaluate the effect of different resin cements on the bond strength (BS) of custom-made glass fiber posts (GFPs) using the push-out test.
Twenty-four uniradicular bovine teeth were selected. The crowns were sectioned at the cementoenamel junction, and the root canals were treated. The post spaces of the teeth were prepared to a length of 12 mm to receive a GFP. The specimens were randomly assigned to three experimental groups ( = 8), according to the resin cement used to fix the GFPs: RelyX U200 (U200), Allcem Core (ACC), and Allcem Dual (ACD). Each specimen was sectioned into six slices per root third (cervical, middle, and apical), which were subjected to the push-out test. BS values were calculated and compared using the Kruskal-Wallis and Friedman tests.
There were significant differences in the middle third, according to the resin cement type used ( < 0.05). ACD showed lower BS values ( < 0.05). Significant differences were observed for ACD among the thirds of the slices, with the lowest values also observed for the middle third ( < 0.05).
The present study shows that ACC and U200 showed higher BS values compared with ACD, and were also less influenced by the depth of the root dentin.
The restoration of endodontically treated teeth is a challenge in dentistry, and, in most cases, will require installation of fiberglass pins. In this respect, several types of resin cements are indicated for cementation of these pins; for this reason, their adhesiveness must be adequately investigated. Conventional cements and self-adhesive cements have shown satisfactory performance in cementing the custom-made GFPs, thereby making these cements satisfactory clinical choices. The present study suggests that ACD had lower performance than the other two cements evaluated.
本研究旨在通过推出试验评估不同树脂水门汀对定制玻璃纤维桩（GFPs）粘结强度（BS）的影响。
选择 24 颗单根牛牙。将牙冠在釉牙骨质界处切割，根管进行处理。将牙的根管预备至 12mm 长以接收 GFP。根据用于固定 GFP 的树脂水门汀，将标本随机分为三组（每组 8 个）：RelyX U200（U200）、Allcem Core（ACC）和 Allcem Dual（ACD）。每个标本的每个根段（颈段、中段和根尖段）均分为 6 个切片，然后进行推出试验。使用 Kruskal-Wallis 和 Friedman 检验比较 BS 值。
根据使用的树脂水门汀类型，中段有显著差异（ < 0.05）。ACD 的 BS 值较低（ < 0.05）。在切片的各个段之间观察到 ACD 之间的显著差异，中段的最低值也观察到（ < 0.05）。
本研究表明，与 ACD 相比，ACC 和 U200 显示出更高的 BS 值，并且受根牙本质深度的影响也较小。
牙髓治疗后牙齿的修复是口腔医学的一个挑战，在大多数情况下，需要安装玻璃纤维钉。在这方面，有几种类型的树脂水门汀适用于这些钉的粘结；因此，必须充分研究其粘附性。传统水门汀和自粘水门汀在粘结定制 GFP 方面表现出满意的性能，因此这些水门汀是满意的临床选择。本研究表明，ACD 的性能低于其他两种评价的水门汀。
