Abstract |
Interfaces between dentin, enamel and luting agents were characterized using low vacuum Scanning Electron Microscopy (SEM). After smear layer creation, one of three luting agents ( RelyX Unicem 2, Clearfil SA Cement and Panavia F 2.0/ ED Primer II) was applied on 60 enamel-dentin specimens and dual-cured or self-cured. Specimens were polished (Experiment 1) and subsequently demineralized and deproteinized (Experiment 2). Adhesive interfaces were analyzed (low vacuum SEM, ×3000). Presence of an interdiffusion zone, tag-like structures (dentin) and marginal gaps (enamel) were assessed. Non-parametrical tests (χ2-test, α = 0.05) were performed. The first null-hypothesis was that the adhesive interface micromorphology between enamel and dentin and self-adhesive resin cements (SARCs) is similar with conventional resin cement used with a self-etch adhesive (CRC+SE). The second null-hypothesis was that the micromorphology is not influenced by curing modes. Interdiffusion zones and tag-like structures (dentin) were observed more frequently for CRC+SE compared to SARCs. For each luting agent, there was a non-significant (p > 0.05) tendency for interdiffusion zone and tag-like structures detectable in more specimens after self-curing compared to dual-curing. Marginal gaps (enamel) were found only for SARCs. The first null-hypothesis was not rejected fully: Tag-like structures and interdiffusion zones in dentin were found for CRC+SE and SARCs. The second null-hypothesis was not rejected.
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Authors | Konstantin Johannes Scholz, Aleksandra Bittner, Fabian Cieplik, Karl-Anton Hiller, Gottfried Schmalz, Wolfgang Buchalla, Marianne Federlin |
Journal | Materials (Basel, Switzerland)
(Materials (Basel))
Vol. 14
Issue 3
(Jan 20 2021)
ISSN: 1996-1944 [Print] Switzerland |
PMID | 33498588
(Publication Type: Journal Article)
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