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. 2020 May 20;12(5):1176.
doi: 10.3390/polym12051176.

Dental Composition Modified with Aryloxyphosphazene Containing Carboxyl Groups

Evgeniy M Chistyakov  1 , Natalya Kolpinskaya  1 , Vera Posokhova  2 , Vladimir Chuev  3
Affiliations

Dental Composition Modified with Aryloxyphosphazene Containing Carboxyl Groups

Evgeniy M Chistyakov et al. Polymers (Basel). .

Abstract

A modifier consisting of the mixture of cyclotriphosphazenes containing 4-allyl-2-methoxyphenoxy and β-carboxyethenylphenoxy moieties was developed for administration with acrylate dental restorative compositions. The synthesized compounds were characterized by 1H and 13C NMR spectroscopy and MALDI-TOF mass spectrometry. The optimal conditions to combine the modifier with the starting dental mixture consisting of bis-GMA and TGM-3 were revealed by differential scanning calorimetry (DSC) method. Properties of the cured modified compositions were evaluated for the compliance with requirements of ISO 4049:2019. It was found that these compositions possess the increased adhesion to dental tissues and cure depth and the decreased water sorption and water solubility. The values of elastic modules, destructive compressive stress and microhardness were also increasing along with the increased content of the modifier in the composition.

Keywords: adhesion; composite material; modification; phosphazene; restorative dentistry.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Synthetic scheme of cure site monomer preparation for the dental composition (I, II, III—products, the synthesis of which is indicated in the section “Materials and Methods”).
Figure 2
Figure 2
31P NMR (A, B and C) and MALDI-TOF (a, b and c) spectra of products I, II and III, respectively.
Figure 3
Figure 3
1H NMR (A and B) and 13C NMR (a and b) of compounds II and III, respectively.
Figure 4
Figure 4
DSC curve for product III.
Figure 5
Figure 5
Dependences of (A) destructive compressive stress and (B) elastic modulus on the content of product III in the compositions.
Figure 6
Figure 6
Microhardness at various depths for the cured compositions containing different amounts of the modifier. Numbers of lines correspond to the sample numbers.
See this image and copyright information in PMC

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