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  • Title: Assessment of Impact of Fluoride on Mechanical Properties of NiTi and CuNiTi Orthodontic Archwires: An In Vitro Study.
    Author: Kaur S, Sonone TP, Goyal M, Kumar J, Tak A, Kedia NB.
    Journal: J Contemp Dent Pract; 2022 May 01; 23(5):548-551. PubMed ID: 35986465.
    Abstract:
    AIM: The current study was carried out to assess the impact on the mechanical properties of orthodontic wires such as the nickel-titanium (NiTi) and copper-nickel-titanium (CuNiTi) wires by fluoride available in various prophylactic products. MATERIALS AND METHODS: Fifty-six wire specimens were randomly divided into two groups-control group in which deionized water was used as a medium and study group in which Phos-Flur gel was used. Both study group and control group were divided into two subgroups-NiTi wire group: 0.019 × 0.025 inch NiTi archwires (14 specimens) and CuNiTi wire group: 0.019 × 0.025 inch CuNiTi archwires (14 specimens). Testing of all the wires was done under a universal force testing machine. RESULTS: Mean loading force among NiTi wire group and CuNiTi wire group specimens with deionized water as a medium was 682.6 and 397.4 MPa, respectively, while the mean loading force among NiTi wire group and CuNiTi wire group specimens with Phos-Flur gel as a medium was 596.1 and 368.4 MPa, respectively. While comparing between study group and control group among NiTi wires, significant results were obtained. Also, while comparing between study group and control group among CuNiTi wires, significant results were obtained. CONCLUSION: Following exposure to fluoride agents, NiTi wires and CuNiTi wires are significantly associated with reduced mechanical properties. CLINICAL SIGNIFICANCE: Although fluoride acts as a vital adjunct in maintaining oral hygiene, particularly among patients undergoing fixed orthodontic treatment, its influence on the mechanical properties of the wires is an area to be explored further; thereby, its use is to be monitored.
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