TODENTJ-25-03-2019_TODENTJ-10-58 1553506420 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 3 15 2016 10 1 Júlio C. M. Souza Joel B. Silva Andrea Aladim Oscar Carvalho Rubens M. Nascimento Filipe S. Silva Antonio E. Martinelli Bruno Henriques Background: Glass-ionomer cements perform a protective effect on the dentin-pulp complex considering the F ions release and chemical bonding to the dental structures. On the other hand, those materials have poor physic-mechanical properties in comparison with the restorative resin composite. The main aim of this work was to evaluate the influence of zirconia and/or alumina fillers on the microstructure and strength of a resin modified glass-ionomer cement after thermal cycling. Methods: An in vitro experimental study was carried out on 9 groups (n = 10) of cylindrical samples (6 x 4 mm) made from resin modified glass-ionomer (Vitremer, 3M, USA) with different contents of alumina and/or zirconia fillers. A nano-hybrid resin composite was tested as a control group. Samples were mechanically characterized by axial compressive tests and electron scanning microscopy (SEM) coupled to energy dispersive X-ray spectrophotometry (EDS), before and after thermal cycling. Thermal cycling procedures were performed at 3000, 6000 and 10000 cycles in Fusayama´s artificial saliva at 5 and 60 oC. Results: An improvement of compressive strength was noticed on glass-ionomer reinforced with alumina fillers in comparison with the commercial glass ionomer. SEM images revealed the morphology and distribution of alumina or zirconia in the microstructure of glass-ionomers. Also, defects such as cracks and pores were detected on the glass-ionomer cements. The materials tested were not affected by thermal cycling in artificial saliva. Conclusion: Addition of inorganic particles at nano-scale such as alumina can increase the mechanical properties of glass-ionomer cements. However, the presence of cracks and pores present in glass-ionomer can negatively affect the mechanical properties of the material because they are areas of stress concentration. 3 15 2016 58 68 TODENTJ-10-58 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2014-12-12 2015-11-5 2015-11-6 2016-3-15 https://creativecommons.org/licenses/by-nc/4.0/legalcode 10.2174/1874210601610010058 1553506420 https://opendentistryjournal.com/VOLUME/10/PAGE/58/ https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-58/TODENTJ-10-58.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-58/TODENTJ-10-58.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-58/TODENTJ-10-58.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-58/TODENTJ-10-58.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-58/TODENTJ-10-58.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-58/TODENTJ-10-58.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-58/TODENTJ-10-58.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-58/TODENTJ-10-58.xml Dent. Mater. Coutinho E. 25 1347 2009 10.1016/j.dental.2009.06.004 Coutinho E, Cardoso MV, De Munck J, et al. Bonding effectiveness and interfacial characterization of a nano-filled resin-modified glass-ionomer. Dent Mater 2009; 25 (11) : 1347-57. Strassler HE. Glass ionomers for direct-placement restorations. Glass Ionomer Cements 2011; [Em linha]. Available at: http://www.ineedce.com/courses/2052/PDF/1104cei_glassionomer_web.pdf. Dent. Mater. Xie D. 16 129 2000 10.1016/S0109-5641(99)00093-7 Xie D, Brantley WA, Culbertson BM, Wang G. Mechanical properties and microstructures of glass-ionomer cements. Dent Mater 2000; 16 (2) : 129-38. Anusavice KJ. Phillips: Materiais dentários. 11th ed. Rio de Janeiro: Editora Elsevier 2005. Loguercio A, Reis A, Navarro MF. Cimento de Ionômero de vidro convencional. In: Reis A, Loguercio A, Eds. Materiais dentários: restauradores direitos: dos fundamentos à aplicação clínica. São Paulo: Editora Santos 2007; pp. 217-47. Aust. Dent. J. Bonifácio C.C. 54 233 2009 10.1111/j.1834-7819.2009.01125.x Bonifácio CC, Kleverlaan CJ, Raggio DP, Werner A, de Carvalho RC, van Amerongen WE. Physical-mechanical properties of glass ionomer cements indicated for atraumatic restorative treatment. Aust Dent J 2009; 54 (3) : 233-7. Oper. Dent. Bouschlicher M.R. 21 90 1996 Bouschlicher MR, Vargas MA, Denehy GE. Effect of desiccation on microleakage of five Class 5 restorative materials. Oper Dent 1996; 21 (3) : 90-5. Biomaterials Smith D.C. 19 467 1998 10.1016/S0142-9612(97)00126-9 Smith DC. Development of glass-ionomer cement systems. Biomaterials 1998; 19 (6) : 467-78. Aust. Dent. J. Sidhu S.K. 56 23 2011 10.1111/j.1834-7819.2010.01293.x Sidhu SK. Glass-ionomer cement restorative materials: a sticky subject? Aust Dent J 2011; 56 (1) (Suppl. 1) : 23-30. Aust. Dent. J. Tyas M.J. 49 112 2004 10.1111/j.1834-7819.2004.tb00059.x Tyas MJ, Burrow MF. Adhesive restorative materials: a review. Aust Dent J 2004; 49 (3) : 112-21. J. Dent. Gale M.S. 27 89 1999 10.1016/S0300-5712(98)00037-2 Gale MS, Darvell BW. Thermal cycling procedures for laboratory testing of dental restorations. J Dent 1999; 27 (2) : 89-99. Ciên Biológica e da Saúde Chammas M.B. 11 35 2009 Chammas MB, Valarini N, Maciel SM, Poli-Frederico PC, Oltramari-Navarro PV, Conti AC. Resistência à compressão de cimentos de ionômero de vidro restauradores encapsulados. UNOPAR Científica. Ciên Biológica e da Saúde 2009; 11 (4) : 35-8. Dent. Mater. Lien W. 26 337 2010 10.1016/j.dental.2009.12.004 Lien W, Vandewalle KS. Physical properties of a new silorane-based restorative system. Dent Mater 2010; 26 (4) : 337-44. J. Mater. Sci. Mater. Med. Xu H.H. 13 875 2002 10.1023/A:1016504530133 Xu HH, Eichmiller FC, Smith DT, Schumacher GE, Giuseppetti AA, Antonucci JM. Effect of thermal cycling on whisker-reinforced dental resin composites. J Mater Sci Mater Med 2002; 13 (9) : 875-83. Biomaterials Fleming G.J. 24 4173 2003 10.1016/S0142-9612(03)00301-6 Fleming GJ, Farooq AA, Barralet JE. Influence of powder/liquid mixing ratio on the performance of a restorative glass-ionomer dental cement. Biomaterials 2003; 24 (23) : 4173-9. Dent. Mater. Ferracane J.L. 27 29 2011 10.1016/j.dental.2010.10.020 Ferracane JL. Resin composite--state of the art. Dent Mater 2011; 27 (1) : 29-38. Dent. Mater. Curtis A.R. 25 188 2009 10.1016/j.dental.2008.06.003 Curtis AR, Palin WM, Fleming GJ, Shortall AC, Marquis PM. The mechanical properties of nanofilled resin-based composites: the impact of dry and wet cyclic pre-loading on bi-axial flexure strength. Dent Mater 2009; 25 (2) : 188-97. Dent. Mater. Prentice L.H. 21 505 2005 10.1016/j.dental.2004.07.016 Prentice LH, Tyas MJ, Burrow MF. The effect of particle size distribution on an experimental glass-ionomer cement. Dent Mater 2005; 21 (6) : 505-10. Nan Fang Yi Ke Da Xue Xue Bao Jiang L. 31 1957 2011 Jiang L, Chen CR, Jin DC, et al. Changes in mechanical properties of seven light-cured composite resins after thermal cycling. Nan Fang Yi Ke Da Xue Xue Bao 2011; 31 (12) : 1957-62. J. Appl. Oral Sci. Cenci M.S. 16 106 2008 10.1590/S1678-77572008000200005 Cenci MS, Pereira-Cenci T, Donassollo TA, Sommer L, Strapasson A, Demarco FF. Influence of thermal stress on marginal integrity of restorative materials. J Appl Oral Sci 2008; 16 (2) : 106-10. Wilson AD, Mclean JW. Glass-ionomer cement. Chicago: Quintessence 1988. Dent. Mater. Feng L. 26 719 2010 10.1016/j.dental.2010.03.004 Feng L, Suh BI, Shortall AC. Formation of gaps at the filler-resin interface induced by polymerization contraction stress: Gaps at the interface. Dent Mater 2010; 26 (8) : 719-29. J. Dent. Res. Fusayama T. 42 1183 1963 10.1177/00220345630420051301 Fusayama T, Katayori T, Nomoto S. Corrosion of gold and amalgam placed in contact with each other. J Dent Res 1963; 42 : 1183-97.