Adhesion and interfacial characterization of biomimetically texturized lithium disilicate
| Autor: | Renan Belli, José Zorzin, Ulrich Lohbauer, Anselm Petschelt, Simon Beck, Aldo R. Boccaccini |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Polymers and Plastics Enamel paint Bond strength General Chemical Engineering 030206 dentistry 02 engineering and technology Adhesion 021001 nanoscience & nanotechnology Microstructure Biomaterials 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Hydrofluoric acid chemistry Etching (microfabrication) visual_art Ultimate tensile strength visual_art.visual_art_medium Adhesive Composite material 0210 nano-technology |
| Zdroj: | International Journal of Adhesion and Adhesives. 91:131-141 |
| ISSN: | 0143-7496 |
| DOI: | 10.1016/j.ijadhadh.2019.03.012 |
| Popis: | Lithium disilicate glass-ceramic (LS2) can be biomimetically textured by crystal orientation, mimicking the microstructure of dental enamel and inducing anisotropic mechanical responses to crack growth. The deliberate texturization of LS2 plays to the clinical advantage of reinforcing weak sites of typical fracture initiation in dental prosthetic constructs. Similar to enamel, adhesion of biomimetically textured LS2 could also show anisotropic behavior. Therefore, tensile bond strength (TBS) before and after thermocycling (TC) and interfacial characterization of biomimetically textured LS2 (parallel (PAR) or perpendicular (PER) crystal orientation) after different pre-treatment modes (hydrofluoric acid etching (HFE), grit blasting (GBL) and self-etching glass-ceramic primer (SGP)) were investigated. TC reduced significantly TBS for all specimens except for GBL. Biomimetic textured LS2 after HFE showed anisotropic behavior regarding adhesion. Crystal orientation reduced TBS for the PER HFE specimens after TC significantly. In general, the TBS of HFE specimens was still higher or not significantly lower compared to other pre-treatment modes like GBL or SGP. For the GBL and SGP specimens, crystal orientation had no influence on TBS and interfacial characteristics. In contrast HFE specimens showed different interfacial characteristics depending if they were PAR or PER texturized. Based on these findings, HFE of biomimetic textured LS2 can be recommended. For bonding, the PAR orientation is recommended as its adhesion potential is less prone to degrade. |
| Databáze: | OpenAIRE |
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