Identification and quantification of leachable substances from polymer-based orthodontic base-plate materials

European Journal of Orthodontics
Hilde B M KopperudHanne Wellendorf

Abstract

The aim of this study was to analyse leachable monomers, additives, and degradation products from polymer-based orthodontic base-plate materials. One heat-cured resin (Orthocryl), one light-cured (Triad VLC), and three thermoplastic materials (Biocryl C, Essix A+, and Essix Embrace) were investigated. Elution was performed in water at 37°C for 10 days. The extract medium was changed and analysed daily. Chromatographic methods were used to identify and quantify the leachables. In addition, the content of residual methyl methacrylate (MMA) was quantified in the poly(methyl methacrylate) (PMMA)-based materials. Statistical analysis of the quantitative results was performed using a t-test for comparison of two independent samples. Monomers and additives leached from the materials polymerized in situ and from the thermoplastic PMMA-based material. No leachable substances were found in the extracts from the other thermoplastic materials. Accumulated over 10 days, a larger amount of MMA leached from the powder-and-liquid material, Orthocryl (42 μg/cm(2)), than from the thermoplastic material, Biocryl C (0.49 μg/cm(2)). The accumulated amounts of monomers leached from Triad VLC were 91 μg/cm(2) of urethane dimethacrylate and 2.2 μg/cm(...Continue Reading

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Citations

Sep 17, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Canan BuralGülsen Bayraktar
Sep 14, 2013·European Journal of Oral Sciences·Greta LodienėEllen M Bruzell
Oct 7, 2014·International Endodontic Journal·B AthanassiadisL J Wash
Aug 2, 2014·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Gregory PolyzoisMuhanad Hatamleh
Oct 18, 2014·International Journal of Occupational Medicine and Environmental Health·Maya LyapinaAngelina Kisselova-Yaneva
Mar 2, 2016·European Journal of Dentistry·Haroon RashidFahim Vohra
May 2, 2019·Indian Journal of Occupational and Environmental Medicine·Maya G LyapinaMariana P Cekova
Jun 24, 2017·Acta Biomaterialia Odontologica Scandinavica·Long G NguyenMarit Øilo

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