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Colour improvement and stability of white spot lesions following infiltration, micro-abrasion, or fluoride treatments in vitro

Yetkiner, Enver ; Wegehaupt, Florian ; Wiegand, Annette ; Attin, Rengin ; Attin, Thomas

In: European Journal of Orthodontics, 2014, vol. 36, no. 5, p. 595-602

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    Titre
    • Colour improvement and stability of white spot lesions following infiltration, micro-abrasion, or fluoride treatments in vitro
    Auteur
    • Yetkiner, Enver. *Department of Orthodontics, University of Ege, Izmir, Turkey
    • Wegehaupt, Florian. **Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zurich,Switzerland
    • Wiegand, Annette. ***Department of Preventive Dentistry, Periodontology and Cariology, University of Göttingen, Germany and
    • Attin, Rengin. ****Clinic for Orthodontics and Pediatric Dentistry, University of Zurich, Switzerland
    • Attin, Thomas. **Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zurich,Switzerland
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • European Journal of Orthodontics, 2014, vol. 36, no. 5, p. 595-602. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:296692
    Summary
    SUMMARYBACKGROUND/OBJECTIVES: White spot lesions (WSLs) are unwelcome side effects of fixed appliances that compromise the treatment outcome. Recently, infiltration of WSLs has been introduced as a viable treatment alternative. The objective was to evaluate the colour improvement of WSLs and their stability against discolouration following infiltration, fluoride, or micro-abrasion treatments in vitro. MATERIALS/METHODS: Artificial WSLs were created in bovine enamel (N = 96) using acidic buffer solution (pH 5, 10 days) and were randomly allocated to four groups. Specimens were treated with infiltration (Icon, DMG), fluoride (Elmex Caries Protection, GABA), and micro-abrasion (Opalustre, Ultradent) or remained untreated (control). Groups were discoloured for 24 hours in tea or tea + citric acid. Colour components and visible colour change (L*, a*, b*, ΔE) were measured spectrophotometrically on following time points: baseline, after WSL formation, after treatment, and during discolouration (8, 16, and 24 hours). Data were analysed using Kruskal-Wallis and Mann-Whitney tests. RESULTS: WSL formation increased (L*) in all groups. Only infiltration reduced this effect to baseline. Highest ΔE improvement was obtained by infiltration and micro-abrasion followed by fluoride. This improvement was stable only for infiltration during discolouration. L*, a*, and b* changed significantly during discolouration in all groups except infiltration. Within the same treatment group, discolouration solutions did not differ significantly. LIMITATIONS: In vitro testing cannot replicate the actual mode of colour improvement or stability but can be used for ranking materials and techniques. CONCLUSIONS/IMPLICATIONS: Infiltration and micro-abrasion treatments were capable of diminishing the whitish appearance of WSLs. Only infiltrated WSLs were stable following discolouration challenge