Residual monomer of reline acrylic resins. Effect of water-bath and microwave post-polymerization treatments

Dental Materials : Official Publication of the Academy of Dental Materials
Vanessa M UrbanQuezia B Cass

Abstract

This study compared the residual monomer (RM) in four hard chair-side reline resins (Duraliner II-D, Kooliner-K, Tokuso Rebase Fast-TRF and Ufi Gel hard-UGH) and one heat-polymerized denture base resin (Lucitone 550-L), which was processed using two polymerization cycles (short-LS and long-LL). It was also investigated the effect of two after polymerization treatments on this RM content. Specimens (n=18) of each material were produced following the manufacturers' instructions and then divided into three groups. Group I specimens were left untreated (GI-control). Specimens of group II (GII) were given post-polymerization treatment by microwave irradiation. In group III (GIII), specimens were submitted to immersion in water at 55 degrees C (reline resins-10 min; denture base resin L-60 min). The RM was analyzed using high performance liquid chromatography (HPLC) and expressed as a percentage of RM. Data were analyzed by two-way ANOVA followed by Tukey's test (alpha=0.05). Comparing control specimens, statistical differences were found among all materials (p<0.05), and the results can be arranged as K (1.52%)>D (0.85%)>UGH (0.45%)>LL (0.24%)>TRF (0.14%)>LS (0.08%). Immersion in hot water (GIII) promoted a significant (p<0.05) redu...Continue Reading

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Citations

Apr 4, 2009·Vojnosanitetski pregled. Military-medical and pharmaceutical review·Milena KostićJelena Kocić
Jun 26, 2014·PloS One·Michele BailNara Hellen Campanha
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