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Open AccessArticle

Effects of Endodontic Irrigants on Material and Surface Properties of Biocompatible Thermoplastics

1
Institute of Lightweight Engineering and Polymer Technology (ILK), Technische Universität Dresden, Holbeinstraße 3, 01307 Dresden, Germany
2
Clinic of Operative and Pediatric Dentistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany
*
Author to whom correspondence should be addressed.
Dent. J. 2019, 7(1), 26; https://doi.org/10.3390/dj7010026
Received: 30 November 2018 / Revised: 26 February 2019 / Accepted: 27 February 2019 / Published: 6 March 2019
(This article belongs to the Special Issue Advanced Dental Biomaterials)
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PDF [4227 KB, uploaded 6 March 2019]
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Abstract

Passive irrigation is an efficient method for a successful endodontic treatment. During sonic activation biocompatible polymer tips are used to activate irrigants. Compared to ultrasonic activation with metallic tips, polymer tips have the advantage of a reduced risk of fracture and minimise dentine damage. Hence, two polymers, polyether ether ketones (PEEK) and polyamide (PA6), were identified for the manufacturing of novel irrigation tips. The chemical resistance against the irrigants ethylenediaminetetraacetic acid (EDTA) 20%, chlorhexidine gluconate (CHX) 2% and sodium hypochlorite (NaOCl) 5.25% was analysed. Using microindentation, the change of hardness, elasticity, surface roughness and appearance of the polymers was determined. PA6 had a high absorption of irrigant compared to PEEK. PEEK was resistant to the investigated irrigants and showed no significant alteration of surface and mechanical properties, whereas PA6 slightly increased its hardness, elastic modulus and surface roughness during long-term exposure at 37 °C. However, PA6 tips seem to be a promising disposable product due to the material’s high deformability and low manufacturing costs. Particularly with regard to structural-dynamic properties and high chemical resistance, PEEK can be considered as a material for reusable irrigation tips. View Full-Text
Keywords: biocompatible polymer; root canal treatment; irrigant activation; passive sonic irrigation; microindentation; hardness; elastic modulus; surface roughness; polyether ether ketone; polyamide biocompatible polymer; root canal treatment; irrigant activation; passive sonic irrigation; microindentation; hardness; elastic modulus; surface roughness; polyether ether ketone; polyamide
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kucher, M.; Dannemann, M.; Modler, N.; Hannig, C.; Weber, M.-T. Effects of Endodontic Irrigants on Material and Surface Properties of Biocompatible Thermoplastics. Dent. J. 2019, 7, 26.

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