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Influence of root dentin treatment on the push-out bond strength of fibre-reinforced posts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Moura, Altair Soares Pereira, Rodrigo Dantas Rached, Fuad Jacob Abi Crozeta, Bruno Monguilhott Mazzi-Chaves, Jardel Francisco Souza-Flamini, Luis Eduardo Cruz, Antonio Miranda |
| Copyright Year | 2017 |
| Abstract | This study evaluates the influence of root dentin treatment with NaOCl alone and combined with EDTA, with and without ultrasound activation, on the push-out bond strength (BS) of fiber-reinforced posts in weakened roots, cemented with RelyX or Panavia. The root canals of 42 maxillary canines were instrumented with Reciproc and 2.5% NaOCl. In the coronal 12mm of all canals, experimental weakening of the roots was produced by reducing dentin thickness with 2.44mm diameter diamond burs. The roots were assigned to 3 groups (n = 14) according to root dentin treatment: 2.5% NaOCl; 2.5% NaOCl + 17% EDTA; and 2.5% NaOCl + 17% EDTA, with solutions agitated using passive ultrasonic irrigation. After cementation of the fiber-reinforced posts the roots were divided in thirds. The first slice of each third was used for the push-out BS test, the second slice for confocal laser scanning microscopy and dentin microhardness (Knoop) analysis. Data were analysed by a two-way ANOVA and Tukey test (a = 0.05). NaOCl + EDTA provided highest BS values than NaOCl (p < 0.0001). Specimens cemented with Panavia presented significantly higher BS than those with RelyX in the three root thirds (p < 0.0001). The highest BS values occurred in the cervical third (p < 0.001). Ultrasound-activated NaOCl + EDTA promoted the greatest reduction in dentin microhardness, followed by NaOCl/EDTA and NaOCl. Ultrasonic activation of NaOCl and EDTA reduced root dentin microhardness, but did not improve the push-out BS of resin-based cements. Panavia presented higher BS than RelyX. RelyX was not influenced by the root dentin treatment protocols. |
| Starting Page | e29 |
| Ending Page | e29 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| DOI | 10.1590/1807-3107BOR-2017.vol31.0029 |
| Alternate Webpage(s) | http://www.scielo.br/pdf/bor/v31/1807-3107-bor-31-1807-3107BOR-2017vol310029.pdf |
| PubMed reference number | 28403332 |
| Alternate Webpage(s) | https://doi.org/10.1590/1807-3107BOR-2017.vol31.0029 |
| Volume Number | 31 |
| Journal | Brazilian oral research |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
