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Enamel loss and adhesive remnants following bracket removal and various clean-up procedures in vitro

Ryf, Sacha ; Flury, Simon ; Palaniappan, Senthamaraiselvi ; Lussi, Adrian ; van Meerbeek, Bart ; Zimmerli, Brigitte

In: The European Journal of Orthodontics, 2012, vol. 34, no. 1, p. 25-32

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    Titre
    • Enamel loss and adhesive remnants following bracket removal and various clean-up procedures in vitro
    Auteur
    • Ryf, Sacha. Departments of Orthodontics and Dentofacial Orthopedics
    • Flury, Simon. Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland
    • Palaniappan, Senthamaraiselvi. Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Catholic University of Leuven, Leuven, Belgium
    • Lussi, Adrian. Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland
    • van Meerbeek, Bart. Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Catholic University of Leuven, Leuven, Belgium
    • Zimmerli, Brigitte. Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • The European Journal of Orthodontics, 2012, vol. 34, no. 1, p. 25-32. Oxford University Press
    Autre version électronique
    Classification
    • Santé
    Mots clés
    Identifiant OAI-PMH
    • oai:doc.rero.ch:301592
    Summary
    This study evaluated the enamel loss and composite remnants after debonding and clean-up. The tested null hypothesis is that there are no differences between different polishing systems regarding removing composite remnants without damaging the tooth surface. Brackets were bonded to 75 extracted human molars and removed after a storage period of 100 hours. The adhesive remnant index (ARI) was evaluated. The clean-up was carried out with five different procedures: 1. carbide bur; 2. carbide bur and Brownie and Greenie silicone polishers; 3. carbide bur and Astropol polishers; 4. carbide bur and Renew polishers; and 5. carbide bur, Brownie, Greenie and PoGo polishers. Silicone impressions were made at baseline (T0) and after debonding (T1) and polishing (T2) to produce plaster replicas. The replicas were analysed with a three-dimensional laser scanner and measured with analytical software. Statistical analysis was performed with the Kruskal-Wallis test and pairwise Wilcoxon tests with Bonferroni-Holm adjustment (α = 0.05). Enamel breakouts after debonding were detectable in 27 per cent of all cases, with a mean volume loss of 0.02 mm3 (±0.03 mm3) and depth of 44.9 μm (±48.3 μm). The overall ARI scores was 3 with a few scores of 1 and 2. The composite remnants after debonding had a mean volume of 2.48 mm3 (±0.92 mm3). Mean volume loss due to polishing was 0.05 mm3 (±0.26 mm3) and the composite remnants had a mean volume of 0.22 mm3 (±0.32 mm3). There were no statistically significant differences in volumetric changes after polishing (P = 0.054) between the different clean-up methods. However, sufficient clean-up without enamel loss was difficult to achieve