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CC BY-NC-ND 4.0 · Eur J Dent 2014; 08(04): 456-463
DOI: 10.4103/1305-7456.143619
Original Article
Dental Investigation Society

Nanoclay addition to a conventional glass ionomer cements: Influence on physical properties

Muhammad A. Fareed
1   School of Metallurgy and Materials, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
2   FMH College of Medicine and Dentistry, University of Health Sciences, Lahore, Pakistan
,
Artemis Stamboulis
1   School of Metallurgy and Materials, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
› Author Affiliations
Further Information

Publication History

Publication Date:
25 September 2019 (online)

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ABSTRACT

Objective: The objective of the present study is to investigate the reinforcement effect of polymer-grade montmorillonite (PGN nanoclay) on physical properties of glass ionomer cement (GIC). Materials and Methods: The PGN nanoclay was dispersed in the liquid portion of GIC (HiFi, Advanced Healthcare, Kent, UK) at 1%, 2% and 4% (w/w). Fourier-transform infrared (FTIR) spectroscopy was used to quantify the polymer liquid of GICs after dispersion of nanoclay. The molecular weight (Mw) of HiFi liquid was determined by gel permeation chromatography. The compressive strength (CS), diametral-tensile strength, flexural strength (FS) and flexural modulus (Ef) of cements (n = 20) were measured after storage for 1 day, 1 week and 1 month. Fractured surface was analyzed by scanning electron microscopy. The working and setting time (WT and ST) of cements was measured by a modified Wilson's rheometer. Results: The FTIR results showed a new peak at 1041 cm−1 which increased in intensity with an increase in the nanoclay content and was related to the Si-O stretching mode in PGN nanoclay. The Mw of poly (acrylic acid) used to form cement was in the range of 53,000 g/mol. The nanoclay reinforced GICs containing <2% nanoclays exhibited higher CS and FS. The Ef cement with 1% nanoclays was significantly higher. The WT and ST of 1% nanoclay reinforced cement were similar to the control cement but were reduced with 2% and 4% nanoclay addition. Conclusion: The dispersion of nanoclays in GICs was achieved, and GIC containing 2 wt% nanoclay is a promising restorative materials with improved physical properties.

Key words:

Glass ionomer - mechanical properties - nanoclay - setting time - working time
 

  • REFERENCES

  • 1 Hickel R. Trends in materials science from the point of view of a practicing dentist. J Eur Ceram Soc 2009; 29: 1283-9
    CrossrefGoogle Scholar
  • 2 Roulet JF. Benefits and disadvantages of tooth-coloured alternatives to amalgam. J Dent 1997; 25: 459-73
    CrossrefPubMedGoogle Scholar
  • 3 Sasanaluckit P, Albustany KR, Doherty PJ, Williams DF. Biocompatibility of glass ionomer cements. Biomaterials 1993; 14: 906-16
    CrossrefPubMedGoogle Scholar
  • 4 Tyas MJ. Milestones in adhesion: Glass-ionomer cements. J Adhes Dent 2003; 5: 259-66
    PubMedGoogle Scholar
  • 5 Nicholson JW, Croll TP. Glass-ionomer cements in restorative dentistry. Quintessence Int 1997; 28: 705-14
    PubMedGoogle Scholar
  • 6 Wiegand A, Buchalla W, Attin T. Review on fluoride-releasing restorative materials-fluoride release and uptake characteristics, antibacterial activity and influence on caries formation. Dent Mater 2007; 23: 343-62
    CrossrefPubMedGoogle Scholar
  • 7 Wilson AD, Kent BE. The glass-ionomer cement: A new translucent dental filling material. J Appl Chem Biotechnol 1971; 21: 313-8
    Google Scholar
  • 8 Williams JA, Billington RW, Pearson G. Silver and fluoride ion release from metal-reinforced glass-ionomer filling materials. J Oral Rehabil 1997; 24: 369-75
    CrossrefPubMedGoogle Scholar
  • 9 Mitra SB. Adhesion to dentin and physical properties of a light-cured glass-ionomer liner/base. J Dent Res 1991; 70: 72-4
    Google Scholar
  • 10 Zhao J, Xie D. A novel hyperbranched poly (acrylic acid) for improved resin-modified glass-ionomer restoratives. Dent Mater 2011; 27: 478-86
    CrossrefPubMedGoogle Scholar
  • 11 Bertolini MJ, Zaghete MA, Gimenes R, de Souza RF, Vaz LG. Preparation of new glass systems by the polymeric precursor method for dental applications. J Non Cryst Solids 2004; 344: 170-5
    CrossrefGoogle Scholar
  • 12 Culbertson BM. New polymeric materials for use in glass-ionomer cements. J Dent 2006; 34: 556-65
    CrossrefPubMedGoogle Scholar
  • 13 Iz SG, Ertugrul F, Eden E, Gurhan SI. Biocompatibility of glass ionomer cements with and without chlorhexidine. Eur J Dent 2013; 7: S89-93
    Google Scholar
  • 14 Moshaverinia A, Ansari S, Movasaghi Z, Billington RW, Darr JA, Rehman IU. Modification of conventional glass-ionomer cements with N-vinylpyrrolidone containing polyacids, nano-hydroxy and fluoroapatite to improve mechanical properties. Dent Mater 2008; 24: 1381-90
    CrossrefPubMedGoogle Scholar
  • 15 Dowling AH, Stamboulis A, Fleming GJ. The influence of montmorillonite clay reinforcement on the performance of a glass ionomer restorative. J Dent 2006; 34: 802-10
    CrossrefPubMedGoogle Scholar
  • 16 Xie D, Chung ID, Wu W, Lemons J, Puckett A, Mays J. An amino acid-modified and non-HEMA containing glass-ionomer cement. Biomaterials 2004; 25: 1825-30
    CrossrefPubMedGoogle Scholar
  • 17 Kawano F, Kon M, Kobayashi M, Miyai K. Reinforcement effect of short glass fibers with CaO – P (2) O (5) – SiO (2) – Al (2) O (3) glass on strength of glass-ionomer cement. J Dent 2001; 29: 377-80
    CrossrefPubMedGoogle Scholar
  • 18 Alexandre M, Dubois P. Polymer-layered silicate nanocomposites: Preparation, properties and uses of a new class of materials. Mater Sci Eng R Rep 2000; 28: 1-63
    CrossrefGoogle Scholar
  • 19 Ray SS, Okamoto M. Polymer/layered silicate nanocomposites: A review from preparation to processing. Prog Polym Sci 2003; 28: 1539-641
    CrossrefGoogle Scholar
  • 20 Fareed MA, Stamboulis A. Nanoclays reinforced glass ionomer cements: Dispersion and interaction of polymer grade (PG) montmorillonite with poly (acrylic acid). J Mater Sci Mater Med 2014; 25: 91-9
    CrossrefPubMedGoogle Scholar
  • 21 Pearson GJ, Atkinson AS. Effects of temperature change on the working and setting characteristics of water-based dental cements. Dent Mater 1987; 3: 275-9
    CrossrefPubMedGoogle Scholar
  • 22 ISO 9917-1:2007 Dentistry-Water-Based Cements-Part 1: Powder/liquid Acid-Base Cements. International Organization for Standardisation; 2009
    Google Scholar
  • 23 ISO 4049:2000 Dentistry, Dentistry-Polymer-Based Filling, Restorative and Luting Materials. International Organization for Standardisation; 2000
    Google Scholar
  • 24 ASTM D790-07 Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials. ASTM; 2007
    Google Scholar
  • 25 Kirwan LJ, Fawell PD, van Bronswijk W. In situ FTIR-ATR Examination of Poly (acrylic acid) Adsorbed onto Hematite at Low pH. Langmuir 2003; 19: 5802-7
    CrossrefGoogle Scholar
  • 26 MacDonald SA, Schardt CR, Masiello DJ, Simmons JH. Dispersion analysis of FTIR reflection measurements in silicate glasses. J Non Cryst Solids 2000; 275: 72-82
    CrossrefGoogle Scholar
  • 27 Hwa LG, Hwang SL, Liu LC. Infrared and Raman spectra of calcium alumino-silicate glasses. J Non Cryst Solids 1998; 238: 193-7
    CrossrefGoogle Scholar
  • 28 Ramos-Tejada MM, Galindo-Gonzalez C, Perea R, Durain JD. Effect of charged polyelectrolytes on the electrophoretic behavior, stability, and viscoelastic properties of montmorillonite suspensions. J Rheol 2006; 50: 995-1007
    CrossrefGoogle Scholar
  • 29 Kornmann X, Lindberg H, Berglund LA. Synthesis of epoxy-clay nanocomposites. Influence of the nature of the curing agent on structure. Polymer 2001; 42: 4493-9
    CrossrefGoogle Scholar
  • 30 Vaia RA, Ishii H, Giannelis EP. Synthesis and properties of two-dimensional nanostructures by direct intercalation of polymer melts in layered silicates. Chem Mater 1993; 5: 1694-6
    CrossrefGoogle Scholar
  • 31 Filippi S, Mameli E, Marazzato C, Magagnini P. Comparison of solution-blending and melt-intercalation for the preparation of poly (ethylene-co-acrylic acid)/organoclay nanocomposites. Eur Polym J 2007; 43: 1645-59
    CrossrefGoogle Scholar