Fabrication and Evaluation of Bis-GMA/TEGDMA Dental Resins/composites Containing Halloysite Nanotubes

Overview

Journal Dent Mater

Specialty Dentistry

Date 2012 Jul 17

PMID 22796038

Citations 14

Authors

Qi Chen

Yong Zhao

Weidong Wu

Tao Xu

Hao Fong

Affiliations

Soon will be listed here.

Abstract

Objective: To investigate the reinforcement of Bis-GMA/TEGDMA dental resins (without conventional glass filler) and the corresponding composites (with conventional glass filler) containing varied mass fractions of halloysite nanotubes (HNTs).

Methods: Three dispersion methods were studied to separate the silanized halloysite as individual HNTs and to uniformly distribute them into dental matrices. Photopolymerization induced volumetric shrinkage was measured by using a mercury dilatometer. Real time near infrared spectroscopy was adopted to study the degree of vinyl double bond conversion and the photopolymerization rate. Mechanical properties of the composites were tested by a universal mechanical testing machine. Analysis of variance (ANOVA) was used for the statistical analysis of the acquired data. Morphologies of halloysite/HNTs and representative fracture surfaces of the reinforced dental resins/composites were examined by SEM and TEM.

Results: Impregnation of small mass fractions (e.g., 1% and 2.5%) of the silanized HNTs in Bis-GMA/TEGDMA dental resins/composites improved mechanical properties significantly; however; large mass fractions (e.g., 5%) of impregnation did not further improve the mechanical properties. The impregnation of HNTs into dental resins/composites could result in two opposite effects: the reinforcing effect due to the highly separated and uniformly distributed HNTs, and the weakening effect due to the formation of HNT agglomerates/particles.

Significance: Uniform distribution of a small amount of well-separated silanized HNTs into Bis-GMA/TEGDMA dental resins/composites could result in substantial improvements on mechanical properties.

Citing Articles

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Antibacterial and Physicochemical Properties of Orthodontic Resin Cement Containing ZnO-Loaded Halloysite Nanotubes.

Seo J, Kim K, Kwon J Polymers (Basel). 2023; 15(9).

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Inorganically modified particles FeAl-LDH@SiO as reinforcement in poly (methyl) methacrylate matrix composite.

Vuksanovic M, Egelja A, Barudzija T, Tomic N, Petrovic M, Marinkovic A R Soc Open Sci. 2021; 8(9):210835.

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