Influence of various fluoride agents on working properties and surface characteristics of uncoated, rhodium coated and nitrified nickel- titanium orthodontic wires

Katić, Višnja and Mandić, Vilko and Ježek, Damir and Baršić, Gorana and Špalj, Stjepan (2015) Influence of various fluoride agents on working properties and surface characteristics of uncoated, rhodium coated and nitrified nickel- titanium orthodontic wires. = Influence of various fluoride agents on working properties and surface characteristics of uncoated, rhodium coated and nitrified nickel- titanium orthodontic wires. Acta odontologica scandinavica, 73 (4). pp. 241-249. ISSN 0001-6357. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q3 (2015). Točan broj autora: 5.

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Official URL: https://www.tandfonline.com/doi/full/10.3109/00016...

Abstract

Abstract Objective. To analyze the effect of various fluoride formulations in commercially available agents on working properties of various nickel- titanium orthodontic wires. Materials and methods. Uncoated (NiTi), rhodium coated (RhNiTi) and nitrified (NNiTi) wires were immersed to dH2O, MiPaste, Elmex and Mirafluor for 1 h. Unloading slope characteristics (average force, bending action of the force and average plateau length) and the percentage of usable constant force during unloading were observed. Surface roughness (Ra) was measured. SEM and EDS were used for observation of the surface. Results. NiTi had decreased loading and unloading elastic modulus (E) and yield strength (YS) after immersion to MIPaste and Mirafluor. The unloading YS decreased in the RhNiTi by the MIPaste. The loading and unloading YS of the NNiTi increased in Elmex and increased average plateau force. RhNiTi showed higher average plateau length and the percentage of useful constant force during unloading in Mirafluor and the average plateau force lowered after immersion to MIPaste. The unloading slope characteristics for NiTi were affected by all three prophylactic agents, mostly by Mirafluor, and produced significantly lower forces during both loading and unloading, similarly to the NNiTi wires. The RhNiTi had the lowest forces during both loading and unloading in MIPaste. All results were at significance ; p < 0.05. Difference in Ra was observed for RhNiTi after immersion to the MI Paste (p < 0.001 ; h2 = 0.761). Conclusion. The NiTi and NNiTi wires lose less working force when combined with Elmex. The RhNiTi improve their working properties with Mirafluor and deteriorate when combined with MiPaste.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): corrosion, orthodontic appliance, roughness, chemically induced, stress, mechanical
Subjects: BIOMEDICINE AND HEALTH > Dental medicine
Divisions: 800 Department of Quality > 810 Chair of Precise Measurement and Quality
Indexed in Web of Science: Yes
Indexed in Current Contents: Yes
Citations JCR: 1 (17.09.2018.)
Quartiles: Q3 (2015)
Date Deposited: 05 Jul 2016 15:38
Last Modified: 17 Sep 2018 12:27
URI: http://repozitorij.fsb.hr/id/eprint/6151

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