Alleviating fatigue and failure of NiTi endodontic files by a coating containing inorganic fullerene-like WS2 nanoparticles
| Autor: | Sidney R. Cohen, Boaz Shay, Lev Rapoport, A. Moshkovich, Adi Ram Adini, Meir Redlich, Reshef Tenne, Joshua Moshonov, Yishay Feldman |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Biocompatibility Root canal 02 engineering and technology engineering.material Corrosion 03 medical and health sciences 0302 clinical medicine Coating medicine General Materials Science Composite material Mechanical Engineering Metallurgy 030206 dentistry Tribology Nanoindentation 021001 nanoscience & nanotechnology Condensed Matter Physics 3. Good health medicine.anatomical_structure Mechanics of Materials Nickel titanium Pseudoelasticity engineering 0210 nano-technology |
| Zdroj: | Journal of Materials Research. 26:1234-1242 |
| ISSN: | 2044-5326 0884-2914 |
| Popis: | Nickel-titanium (NiTi) alloys combine several remarkable characteristics, among them are shape-memory, superelasticity, great strain recovery, good biocompatibility, and corrosion resistance. These render them well suited to a wide range of medical applications, such as cardiovascular stents, laparoscopy, and dental applications such as NiTi endodontic files (EFs) used for root canal treatment, which are the focus of this work. Unfortunately, fatigue-induced and incidental failure of NiTi EFs is not uncommon, which may lead to severe medical consequences. Here we examine the effects of cobalt coatings with impregnated fullerene-like WS2 nanoparticles on file fatigue and failure. Dynamic x-ray diffraction, nanoindentation and torque measurements all indicate a significant improvement in the fatigue resistance and time to breakage of the coated files, stemming from reduced friction between the file and the surrounding tissue. These methods are possibly applicable to a variety of NiTi-based medical devices where fatigue and consequent failure are of relevance. |
| Databáze: | OpenAIRE |
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