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A High-Strength Cement System for Improved Dental Restoratives

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DOI: 10.4236/msce.2014.23001    4,487 Downloads   6,224 Views  

ABSTRACT

We have developed and studied a novel high-strength glass-ionomer cement system composed of poly(acrylic acid) with different molecular architectures. These poly(acrylic acid) polymers were synthesized via ATRP technique. The effects of arm number and branching on reaction kinetics, viscosity, and mechanical strengths of the formed polymers and cements were evaluated. The results showed that unlike the star-shaped polymer synthesis both hyperbranched and star-hyperbranched polymers syntheses proceed slowly at the early stage but accelerate at the later stage. The higher the arm number and initiator concentration are, the faster the ATRP reaction was. It was also found that the higher the arm number and branching that the polymer had, the lower the viscosity of the polymer aqueous solution is and the lower the mechanical strengths of the formed cement are. The mechanical strengths of three synthesized polymers-composed experimental cements were very similar to each other but much higher than those of Fuji II LC. The experimental cements were 31% - 53% in CS, 37% - 55% in compressive modulus, 80% - 126% in DTS, 76% - 94% in FS, 4% - 21% in FT and 53% - 96% in KHN higher than Fuji II LC. For wear test, the experimental cements were only 5.4% - 13% of abrasive and 6.4% - 12% of attritional wear depths of Fuji II LC in each wear cycle. The one-month aging study also showed that all the experimental cements increased their CS continuously during 30 days, unlike Fuji II LC.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Xie, D. , Zhao, J. and Weng, Y. (2014) A High-Strength Cement System for Improved Dental Restoratives. Journal of Materials Science and Chemical Engineering, 2, 1-15. doi: 10.4236/msce.2014.23001.

References

[1] Smith, D.C. (1998) Development of Glass-Ionomer Cement Systems. Biomaterials, 9, 467-478.
http://dx.doi.org/10.1016/S0142-9612(97)00126-9
[2] Wilson, A.D. and McLean, J.W. (1988) Glass-Ionomer Cements. Quintessence Publ Co., Chicago.
[3] Davidson, C.L. and Mjor, I.A. (1999) Advances in Glass-Ionomer Cements. Quintessence Publ Co., Chicago.
[4] Wilson, A.D. (1990) Resin-Modified Glass-Ionomer Cement. The International Journal of Prosthodontics, 3, 425-429.
[5] Hotz, P., McLean, J.W., Sced, I. and Wilson, A.D. (1977) The Bonding of Glass-Ionomer Cements to Metal and Tooth Substrates. British Dental Journal, 142, 41-47.
http://dx.doi.org/10.1038/sj.bdj.4803864
[6] Lacefield, W.R., Reindl, M.C. and Retief, D.H. (1985) Tensile Bond Strength of a Glass-Ionomer Cement. The Journal of Prosthetic Dentistry, 53, 194-198. http://dx.doi.org/10.1016/0022-3913(85)90108-8
[7] Forsten, L. (1977) Fluoride Release from a Glass-Ionomer Cement. Scandinavian Journal of Dental Research, 85, 503-504.
[8] Craig, R.G. (1997) Restorative Dental Materials. 10th Edition, Mosby-Year Book, Inc., St Louis.
[9] Nicholson, J.W., Braybrook, J.H. and Wasson, E.A. (1991) The Biocompatibility of Glass-Poly(alkenoate) GlassIonomer Cements: A Review. Journal of Biomaterials Science. Polymer Edition, 2, 277-285.
http://dx.doi.org/10.1163/156856291X00179
[10] Hume, W.R. and Mount, G.J. (1988) In Vitro Studies on the Potential for Pulpal Cytotoxicity of Glass-Ionomer Cements. Journal of Dental Research, 67, 915-918.
http://dx.doi.org/10.1177/00220345880670060501
[11] Guggenberger, R., May, R. and Stefan, K.P. (1998) New Trends in Glass-Ionomer Chemistry. Biomaterials, 19, 479483. http://dx.doi.org/10.1016/S0142-9612(97)00127-0
[12] Mitra, S.B. (1991) Adhesion to Dentin and Physical Properties of A Light-Cured Glass-Ionomer Liner/Base. Journal of Dental Research, 70, 72-74.
http://dx.doi.org/10.1177/00220345910700011201
[13] Momoi, Y., Hirosaki, K., Kohno, A. and McCabe, J.F. (1995) Flexural Properties of Resin-Modified Hybrid GlassIonomers in Comparison with Conventional Acid-Base Glass-Ionomers. Dental Materials Journal, 14, 109-119.
http://dx.doi.org/10.4012/dmj.14.109
[14] Xie, D., Culbertson, B.M. and Johnston, W.M. (1998) Formulations of Light-Curable Glass-Ionomer Cements Containing N-Vinylpyrrolidone. Journal of Macromolecular Science, Part A Pure and Applied Chemistry, A35, 1631-1650. http://dx.doi.org/10.1080/10601329808000976
[15] Xie, D., Wu, W., Puckett, A., Farmer, B. and Mays, J. (2004) Novel Resin-Modified Glass-Ionomer Cements with Improved Flexural Strength and Ease of Handling. European Polymer Journal, 40, 343-351.
http://dx.doi.org/10.1016/j.eurpolymj.2003.09.022
[16] Kao, E.C., Culbertson, B.M. and Xie, D. (1996) Preparation of Glass-Ionomer Cement Using N-Acryloyl-Substituted Amino Acid Monomers: Evaluation of Physical Properties. Dental Materials, 12, 44-51.
http://dx.doi.org/10.1016/S0109-5641(96)80063-7
[17] Xie, D., Chung, I.D., Wu, W., Lemons, J., Puckett, A. and Mays, J. (2004) An Amino Acid Modified and Non-HEMA Containing Glass-Ionomer Cement. Biomaterials, 25, 1825-1830.
http://dx.doi.org/10.1016/j.biomaterials.2003.08.033
[18] Xie, D., Culbertson, B.M. and Johnston, W.M. (1998) Improved Flexural Strength of N-Vinylpyrrolidone Modified Acrylic Acid Copolymers for Glass-Ionomers. Journal of Macromolecular Science, Part A Pure and Applied Chemistry, A35, 1615-1629. http://dx.doi.org/10.1080/10601329808000975
[19] Bahadur, P. and Sastry, N.V. (2002) Principles of Polymer Science. CRC Press, Boca Raton.
[20] Huang, C.F., Lee, H.F., Kuo, S.W., Xu, H. and Chang, F.C. (2004) Star Polymers via Atom Transfer Radical Polymerization from Adamantine-Based Cores. Polymer, 45, 2261-2269.
http://dx.doi.org/10.1016/j.polymer.2004.01.051
[21] Xie, D., Park, J.G. and Zhao, J. (2007) Synthesis and Preparation of Novel 4-Arm Star-Shape Poly(carboxylic acid)s for Improved Light-Cured Glass-Ionomer Cements. Dental Materials, 23, 395-403.
http://dx.doi.org/10.1016/j.dental.2006.02.008
[22] Xie, D., Yang, Y., Zhao, J., Park, J.G. and Zhang, J.T. (2007) A Novel Comonomer-Free Light-Cured Glass-Ionomer Cement for Reduced Cytotoxicity and Enhanced Mechanical Strength. Dental Materials, 23, 994-1003.
http://dx.doi.org/10.1016/j.dental.2006.09.001
[23] Zhao, J. and Xie, D. (2011) A Novel Hyperbranched Poly(acrylic acid) for Improved Resin-Modified Glass-Ionomer Restoratives. Dental Materials, 27, 478-486.
http://dx.doi.org/10.1016/j.dental.2011.02.005
[24] Johnson, W.W., Dhuru, V.B. and Brantley, W.A. (1993) Composite Microfiller Content and Its Effect on Fracture Toughness and Diametral Tensile Strength. Dental Materials, 9, 95-98.
http://dx.doi.org/10.1016/0109-5641(93)90082-2
[25] Xie, D., Brantley, W.A., Culbertson, B.M. and Wang, G. (2000) Mechanical Properties and Microstructures of GlassIonomer Cements. Dental Materials, 16, 129-138.
http://dx.doi.org/10.1016/S0109-5641(99)00093-7
[26] Dowling, A.H. and Fleming, G.J.P. (2007) The Impact of Montmorillonite Clay Addition on the in Vitro Wear Resistance of a Glass-Ionomer Restorative. Journal of Dentistry, 35, 309-317.
http://dx.doi.org/10.1016/j.jdent.2006.10.002
[27] Condon, J.R. and Ferracane, J.L. (1996) Evaluation of Composite Wear with a New Multi-Mode Oral Wear Simulator. Dental Materials, 12, 218-226. http://dx.doi.org/10.1016/S0109-5641(96)80026-1
[28] Turssi, C.P., Ferracane, J.L. and Vogel, K. (2005) Filler Features and Their Effects on Wear and Degree of Conversion of Particulate Dental Resin Composites. Biomaterials, 26, 4932-4937.
http://dx.doi.org/10.1016/j.biomaterials.2005.01.026
[29] Matyjaszewski, K. and Xia, J. (2001) Atom Transfer Radical Polymerization. Chemical Reviews, 101, 2921-2990.
http://dx.doi.org/10.1021/cr940534g
[30] Shipp, D.A. and Matyjaszewski, K. (1999) Kinetic Analysis of Controlled/“Living” Radical Polymerizations by Simulations. 1. The Importance of Diffusion-Controlled Reactions. Macromolecules, 32, 2948.
http://dx.doi.org/10.1021/ma9819135
[31] Shipp, D.A. and Matyjaszewski, K. (2000) Kinetic Analysis of Controlled/“Living” Radical Polymerizations by Simulations. 2. Apparent External Orders of Reactants in Atom Transfer Radical Polymerization. Macromolecules, 33, 1553-1559. http://dx.doi.org/10.1021/ma991651m
[32] Cattani-Lorente, M.A., Godin, C. and Meyer, J.M. (1994) Mechanical Behavior of Glass ionomer Cements Affected by Long-term Storage in Water. Dental Materials, 10, 37-44.
http://dx.doi.org/10.1016/0109-5641(94)90020-5
[33] Pearson, G.J. and Atkinson, A.S. (1991) Long-Term Flexural Strength of Glass-Ionomer Cements. Biomaterials, 12, 658-660. http://dx.doi.org/10.1016/0142-9612(91)90113-O

  
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