ArticleJournal of Taibah University Medical Sciences2025
Dimensional accuracy and degree of conversion of a novel self-polymerized acrylic resin modified with chlorhexidine-halloysite nanotubes: An in vitro controlled study.
Article in Journal of Taibah University Medical Sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors.
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Abstract
Objectives: The integration of chlorhexidine-loaded halloysite nanotubes (CHX/HNTs) into acrylic-based orthodontic devices is a promising preventive measure to mitigate microbial proliferation under removable orthodontic appliances. The study was aimed at evaluating the physical properties of acrylic resin, particularly the degree of conversion (DC) and dimensional accuracy, after the integration of a novel CHX/HNT antimicrobial nanomaterial. Methods: Fifty rectangular acrylic polymethyl methacrylate specimens were prepared with varying concentrations of CHX-HNTs. The degree of conversion was assessed using Fourier transform infrared spectroscopy. Dimensional accuracy was measured with digital caliper, which was used to assess the acrylic indentation dimensions before and after water immersion at multiple time points. Statistical comparisons were performed using one-way ANOVA, Tukey's tests, and Bonferroni testing following repeated measures ANOVA. Results: All experimental groups showed a significantly lower DC than the control group ( Conclusions: Incorporation of CHX/HNT nanofillers negatively affected the DC but enhanced the dimensional stability of PMMA acrylic resin for as long as 60 days.
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