Degree of conversion and physicomechanical properties of newly developed flowable composite derived from rice husk using urethane dimethacrylate monomer
Restricted accessResearch articleFirst published online December, 2023
Degree of conversion and physicomechanical properties of newly developed flowable composite derived from rice husk using urethane dimethacrylate monomer
This study evaluated the use of urethane dimethacrylate (UDMA) as a base monomer to prepare the newly developed flowable composite (FC) using nanohybrid silica derived from rice husk in comparison to bisphenol A-glycidyl methacrylate (Bis-GMA) on the degree of conversion and physicomechanical properties. The different loadings of base monomer to diluent monomer were used at the ratio of 40:60, 50:50, and 60:40. The bonding analysis confirmed the presence of nanohybrid silica in the newly developed FC. Independent t-test revealed a statistically significant increase in the degree of conversion, depth of cure and Vickers hardness of the UDMA-based FC, while surface roughness showed comparable results between the two base monomers. In conclusion, UDMA-based FC demonstrated superior performance with 60%–65% conversions, a significantly higher depth of cure exceeding 1 mm which complies with the Internal Standard of Organization 4049 (ISO 4049), and a substantial increase in Vickers hardness numbers compared to Bis-GMA-based FC, making UDMA a suitable alternative to Bis-GMA as a base monomer in the formulation of this newly developed FC derived from rice husk.
Hervás-GarcíaAMartínez-LozanoMCabanes-VilaJ, et al. Composite resins. A review of the materials and clinical indications. Med Oral Patol Oral Cir Bucal2006; 11: 215–220.
2.
BaroudiKRodriguesJC. Flowable resin composites: a systematic review and clinical considerations. J Clin Diagn Res2015; 9: ZE18–ZE24.
3.
DavidsonCLFeilzerAJ. Polymerization shrinkage and polymerization shrinkage stress in polymer-based restoratives. J Dent1997; 25: 435–440.
4.
MillarBJNicholsonJW. Effect of curing with a plasma light on the properties of polymerizable dental restorative materials. J Oral Rehabil2001; 28: 549–552.
5.
Bijelic-DonovaJGaroushiSLassilaLVJ, et al. Mechanical and structural characterization of discontinuous fiber-reinforced dental resin composite. J Dent2016; 52: 70–78.
6.
HabibEWangRWangY, et al. Inorganic fillers for dental resin composites: present and future. ACS Biomater Sci Eng2016; 2(1): 1–11.
7.
ShouhaPSwainMEllakwaA. The effect of fiber aspect ratio and volume loading on the flexural properties of flowable dental composite. Dent Mater2014; 30: 1234–1244.
8.
AthinarayananJPeriasamyVSAlhazmiM, et al. Synthesis of biogenic silica nanoparticles from rice husks for biomedical applications. Ceram Int2015; 41: 275–281.
9.
NoushadMAb RahmanIChe ZulkifliNS, et al. Low surface area nanosilica from an agricultural biomass for fabrication of dental nanocomposites. Ceram Int2014; 40: 4163–4171.
10.
ZulkifliNSCAb RahmanIMohamadD, et al. A green sol–gel route for the synthesis of structurally controlled silica particles from rice husk for dental composite filler. Ceram Int2013; 39: 4559–4567.
11.
YusoffNMJohariYAb RahmanI, et al. Physical and mechanical properties of flowable composite incorporated with nanohybrid silica synthesised from rice husk. J Mater Res Technol2019; 8: 2777–2785.
12.
GhaniNNALinGSIsmailN, et al. New experimental zirconia-reinforced rice husk nanohybrid composite and the outcome of its surface roughness and microhardness in comparison with commercialized nanofilled and microhybrid composite resins. Contemp Clin Dent2021; 12: 21–27.
13.
AL-RawasMJohariYMohamadD, et al. Water sorption, solubility, degree of conversion, and surface hardness and topography of flowable composite utilizing nano silica from rice husk. J Mater Res Technol2021; 15: 4173–4184.
14.
ShengSBAlawiRJohariY, et al. Effects of fiber loading on mechanical properties of kenaf nanocellulose reinforced nanohybrid dental composite made of rice husk silica. J Funct Biomater2023; 14: 184–216.
15.
DickensSHStansburyJWChoiKM, et al. Photopolymerization kinetics of methacrylate dental resins. Macromolecules2003; 36: 6043–6053.
16.
GajewskiVEPfeiferCSFróes-SalgadoNR, et al. Monomers used in resin composites: degree of conversion, mechanical properties and water sorption/solubility. Braz Dent J2012; 23: 508–514.
17.
AsmussenEPeutzfeldtA. Influence of UEDMA, BisGMA and TEGDMA on selected mechanical properties of experimental resin composites. Dent Mater1998; 14: 51–56.
18.
Barszczewska-RybarekIMChrószczMWChladekG. Novel urethane-dimethacrylate monomers and compositions for use as matrices in dental restorative materials. Int J Mol Sci2020; 21: 2644–2723.
19.
FujitaKNishiyamaNNemotoK, et al. Effect of base monomer’s refractive index on curing depth and polymerization conversion of photo-cured resin composites. Dent Mater J2005; 24: 403–408.
20.
FugolinAPde PaulaABDobsonA, et al. Alternative monomer for bisGMA-free resin composites formulations. Dent Mater2020; 36: 884–892.
21.
FloydCJEDickensSH. Network structure of Bis-GMA- and UDMA-based resin systems. Dent Mater2006; 22: 1143–1149.
22.
RahmanIHusseinAMohamadD, et al. Hybrid spherical silica nanoparticles. Patent MY-187327-A, Malaysia, 2021.
23.
ISO 4049:2000. Dentistry -Polymer-based filling, restorative and luting materials.
24.
AnusaviceKJShenCRawlsHR. Phillip’s science of dental materials. 12th ed.Elsevier: St. Louis, 2013, pp.1689–1699.
25.
GauthierMAStangelIEllisTH, et al. A new method for quantifying the intensity of the C=C band of dimethacrylate dental monomers in their FTIR and Raman spectra. Biomaterials2005; 26: 6440–6448.
26.
MendesLCTedescoADMirandaMS. Determination of degree of conversion as function of depth of a photo-initiated dental restoration composite. Polym Test2005; 24: 418–422.
27.
SideridouITserkiVPapanastasiouG. Effect of chemical structure on degree of conversion in light-cured dimethacrylate-based dental resins. Biomaterials2002; 23: 1819–1829.
28.
SilikasNEliadesGWattsDC. Light intensity effects on resin-composite degree of conversion and shrinkage strain. Dent Mater2000; 16: 292–296.
29.
AlshaliRZSilikasNSatterthwaiteJD. Degree of conversion of bulk-fill compared to conventional resin-composites at two time intervals. Dent Mater2013; 29: e213–e217.
30.
LeprinceJGPalinWMHadisMA, et al. Progress in dimethacrylate-based dental composite technology and curing efficiency. Dent Mater2013; 29: 139–156.
31.
SideridouIDKarabelaMM. Effect of the amount of 3-methacyloxypropyltrimethoxysilane coupling agent on physical properties of dental resin nanocomposites. Dent Mater2009; 25: 1315–1324.
32.
KhatriCAStansburyJWSchultheiszCR, et al. Synthesis, characterization and evaluation of urethane derivatives of Bis-GMA. Dent Mater2003; 19: 584–588.
33.
LempelECzibulyaZKovácsB, et al. Degree of conversion and BisGMA, TEGDMA, UDMA elution from flowable bulk fill composites. Int J Mol Sci2016; 17: 732–813.
34.
FanPSchumacherRAzzolinK, et al. Curing-light intensity and depth of cure of resin-based composites tested according to international standards. Am J Dent2002; 133: 429–434.
35.
Pérez-MondragónAACuevas-SuárezCEGonzález-LópezJA, et al. Evaluation of new coinitiators of camphorquinone useful in the radical photopolymerization of dental monomers. J Photochem Photobiol A Chem2020; 403: 1–9.
36.
IkemuraKEndoT. A review of the development of radical photopolymerization initiators used for designing light-curing dental adhesives and resin composites. Dent Mater J2010; 29: 481–501.
37.
LudovichettiFSLucchiPZambonG, et al. Depth of cure, hardness, roughness and filler dimension of bulk-fill flowable, conventional flowable and high-strength universal injectable composites: an in vitro study. Nanomater2022; 12: 1951–2015.
38.
OzelEKorkmazYAttarN, et al. Effect of one-step polishing systems on surface roughness of different flowable restorative materials. Dent Mater J2008; 27: 755–764.
39.
SchmittVLPuppin-RontaniRMNaufelFS, et al. Effect of the polishing procedures on color stability and surface roughness of composite resins. ISRN Dent2011; 2011: 1–6.
40.
YurdaguvenHAykorAOzelE, et al. Influence of a prophylaxis paste on surface roughness of different composites, porcelain, enamel and dentin surfaces. Eur J Dent2012; 06: 001–008.
41.
BollenCMLLambrechtsPQuirynenM. Comparison of surface roughness of oral hard materials to the threshold surface roughness for bacterial plaque retention: a review of the literature. Dent Mater1997; 13: 258–269.
42.
LeeS-YKimH-CHurB, et al. Surface roughness and color stability of various composite resins. J Korean Acad Conserv Dent2007; 32: 542–549.
43.
IbrahimMWenYGarciaM. Surface roughness of tooth coloured restorative materials. Ann Dent2020; 27: 41–49.
44.
CenciMSVenturiniDPereira-CenciT, et al. The effect of polishing techniques and time on the surface characteristics and sealing ability of resin composite restorations after one-year storage. Oper Dent2008; 33: 169–176.
45.
WangLD’AlpinoPHPLopesLG, et al. Mechanical properties of dental restorative materials: relative contribution of laboratory tests. J Appl Oral Sci2003; 11: 162–167.
46.
TchorzJDollRWolkewitzM, et al. Microhardness of composite materials with different organic phases in deep class II cavities: an in vitro study. Oper Dent2011; 36: 502–511.
