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Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention

Sifakakis, Iosif ; Zinelis, Spiros ; Patcas, Raphael ; Eliades, Theodore

In: Biomedical Engineering / Biomedizinische Technik, 2017, vol. 62, no. 3, p. 289-294

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    Titre
    • Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention
    Auteur
    • Sifakakis, Iosif. Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece
    • Zinelis, Spiros. Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece
    • Patcas, Raphael. Clinic of Orthodontics and Paediatric Dentistry, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland
    • Eliades, Theodore. Clinic of Orthodontics and Paediatric Dentistry, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Tedesco
    Publié dans
    • Biomedical Engineering / Biomedizinische Technik, 2017, vol. 62, no. 3, p. 289-294. De Gruyter
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:332777
    Summary
    AbstractObjective: The aim of the present study was to test the mechanical properties of different adhesives used in orthodontics for fixed retainers and to investigate their possible interrelations. Materials and methods: Specimens of six different adhesive resins were prepared: Transbond XT, Transbond LR and an experimental BPA-free orthodontic adhesive, as well as IPS Empress Direct (IPS-ED), ZNano and Accolade. The mechanical properties tested were Martens hardness (HM), indentation modulus (EIT), the ratio of elastic to total work, commonly known as elastic index (ηIT) and Vickers hardness (HV). These properties were determined using instrumented indentation testing according to ISO 14577-2002. The results of the aforementioned properties were statistically compared with one-way ANOVA-test and Student-Newman-Keuls multiple comparison test at a=0.05, while possible correlations among the properties tested were analyzed by Pearson correlation. Results: Significant differences were identified among all the materials tested for HM, with Transbond LR presenting the highest value. This resin presented the highest EIT too. Significant EIT differences were identified among the materials and only ZNano and IPS-ED showed no significant differences for this property. Transbond LR and ZNano showed higher HV values. ZNano demonstrated the highest elastic index. Pearson analysis showed a strong positive correlation between HM and EIT (0.970), HM and HV (0.837), and EIT and HV (0.695), while a weak negative correlation was found between EIT and elastic index (-0.505). Conclusions: The materials tested demonstrated significant differences in their mechanical properties, and thus differences in their clinical performance are anticipated.