Comparative Evaluation of Flexural Strength of Conventional Glass Ionomer Cement and Glass Ionomer Cement Modified with Chitosan, Titanium Dioxide Nanopowder and Nanohydroxyapatite: An In Vitro Study
Insha Showkat, Seema Chaudhary, Ashish A Sinha, Naveen Manuja, Chaitra R Telgi, Neha Priya, Minha M Kak
Aim: To evaluate the effect of different add-ons on the flexural strength (FS) of glass ionomer cement (GIC). Materials and methods: Around 72 samples were fabricated and divided among the following six different groups: group I—control (conventional GIC—nonmodified), group II—GIC powder modified with 3% titanium dioxide (TiO2) and liquid is unmodified, group III—powder modified with 10% nanohydroxyapatite (nHA) and liquid is unmodified, group IV—powder is unmodified and Liquid is modified with 10% chitosan (CH), group V—powder is modified with 3% TiO2 and liquid is modified with 10% CH, and group VI—powder is modified with 10% nHA and liquid is modified with 10% CH. The samples were then subjected to a three-point bending test on a universal testing machine for the evaluation of FS. The results obtained were analyzed statistically using the analysis of variance (ANOVA) test. Result: The mean FS value of group V depicts significantly high FS among all groups (29.42 ± 3.35). A significant difference was present in FS amongst all the groups that is groups V>II>IV>VI>III>I. Conclusion: Glass ionomer cement (GIC) powder can be modified with nHA, nanotitanium, and GIC liquid can be modified with CH to improve its FS. Clinical significance: Glass ionomer cement (GIC) supplemented with additives like nanoparticles (NPs) and CH can be used as an enhanced filling material due to its potential antibacterial properties and in areas with a high masticatory load.
Wilson AD, Kent BE. The glass-ionomer cement, a new translucent dental filling material. J Appl Chem 1971;21:313–313.
Elaska SE, Hamouda IM, Swain MV. Titanium dioxide nanoparticles addition to a conventional glass-ionomer restorative: influence on physical and antibacterial properties. J Dent 2011;39(9):589–598. DOI: 10.1016/j.jdent.2011.05.006
Garcia-contreras R, Scougall-Vilchis RJ, Contreras-Bulnes R, et al. Mechanical, antibacterial and bond strength properties of nano-titanium-enriched glass ionomer cement. J Appl Oral Sci 2015;23(3):321–328. DOI: 10.1590/1678-775720140496
Khurshid Z, Zafar M, Qasim S, et al. Advances in nanotechnology for restorative dentistry. Materials (Basel)2015;8(2):717–731. DOI: 10.3390/ma8020717
Lyapina MG, Tzekova M, Dencheva M, et al. Nanoglass-ionomer cements in modern restorative dentistry. J of IMAB 2016;22(2):1160–1165. DOI: 10.5272/jimab.2016222.1160
Moshaverinia A, Ansari S, Moshaverinia M, et al. Effects of incorporation of hydroxyapatite and fluoroapatite nanobioceramics into conventional glass ionomer cements (GIC). Acta Biomater 2008;4(2):432–440. DOI: 10.1016/j.actbio.2007.07.011
Ibrahim MA, Meera Priyadarshini B, Neo J, et al. Characterization of chitosan/TiO2 nano-powder modified glass-ionomer cement for restorative dental applications. J Esthet Restor Dent 2017;29(2):146–156. DOI: 10.1111/jerd.12282
Najeeb S, Khurshid Z, Zafar MS, et al. Modifications in glass ionomer cements: nano-sized fillers and bioactive nanoceramics. Int J Mol Sci 2016;17(7):1134. DOI: 10.3390/ijms17071134
Barandehfard F, Rad MS, Hosseinnia A, et al. The addition of synthesized hydroxyapatite and fluorapatite nanoparticles to a glass-ionomer cement for dental restoration and its effects on mechanical properties. Ceramics International 2016;42(15):1–41. DOI: 10.1016/j.ceramint.2016.08.122
Azlisham NAF, Abdul Rahman FS, Mohamad D. Flexural and morphological properties of Newly developed glass ionomer cement (GIC) with the incorporation of 3-acetylcoumarin. Malays J Micros 2015;11:11–15.
Nicholson JW, Hawkins SJ, Smith JE. The incorporation of hydroxyapatite into glass polyalkenoate (“glass ionomer”) cements: a preliminary study. J Mater Sci Mater Med 1993;4:418–421.
Petri DF, Donegá J, Benassi AM, et al. Preliminary study on chitosan modified glass ionomer restoratives 2007. Dent Mater 2007;23(8):1004–1010. DOI: 10.1016/j.dental.2006.06.038
Basir MM, Ataei M, Rezvani MB, et al. Effect of incorporation of various amounts of nano-sized hydroxyapatite on the mechanical properties of a resin modified glass ionomer. J Dent Sch 2012;30(4):216–223.
