Poly(methyl methacrylate) (PMMA) denture base composites were fabricated by incorporating nitrile butadiene rubber (NBR) particles and ceramic fillers (Al2O3, YSZ, and SiO2). PMMA powder was mixed with liquid methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDMA) as crosslinking agents. The different types of ceramic fillers were fixed at 5 wt.% and NBR particles in proportions of 5, 7.5 and 10 wt.%, respectively, mixed with PMMA. The impact strength (IS) increased and the fracture toughness (KIC) decreased with the increase of NBR content in PMMA matrix. The composites with Al2O3 showed better IS and KIC when compared to YSZ and SiO2 particles. It has been demonstrated that the combination of 10 wt.% NBR/5 wt.% Al2O3 produced the optimum density (1.049 g/cm3), IS (7.41 KJ/m2), KIC (2.45 MPa.m1/2) and statistically the values was significantly increased (p < 0.05).
MengTR, LattaMA. Physical properties of four acrylic denture base resins. J. Contemp. Dent. Pract., 6, (2005) 93–100.
2.
VojdaniM, BagheriR, KhalediAAR. Effect of aluminium oxide addition on the flexural strength, surface hardness, and roughness of heat-polymerized acrylic resin. J. Dent. Sci., 7, (2012) 238–244.
3.
FerracaneJL. Materials in dentistry principles and applications.USA: Lippincott Williams & Wilkins A Wolters Kluwer Company (2001).
4.
HassainS.Textbook of dental materials.India: Jaypee Brothers Medical Publishers (P) Ltd. (2004).
5.
PowersJM, SakaguchiRL. Craig's restorative dental materials.USA: Mosby, Inc., an affiliate of Elsevier Inc. (2006).
6.
PuriG, BerzinsDW, DhuruVB, RajPA, RambhiaSK, DhirG, DentinoAR. Effect of phosphate group addition on the properties of denture base resins. J. Prost. Dent., 100, (2008); 302–308.
7.
TuMG, LiangWM, WuTC, ChenSY. Improving the mechanical properties of fiber-reinforced acrylic denture base resin. Mater. Des., 30, (2009) 2468–2472.
8.
HersekN, UzunG.Comparison of the fracture resistance of six denture base acrylic resins. J Biomater Appl., 17, (2002) 19–29.
9.
HargreavesAS. The prevalence of fractured dentures; a survey. J. Brit. Dent., 126, (1969) 451–455.
10.
DarbarUR, HuggettR, HarrisonA.Denture fracture – a survey. J. Brit. Dent., 176, (1994) 342–345.
ElshereksiNW, MohamedSH, ArifinA, IshakZAM. Effect of filler incorporation on the fracture toughness properties of denture base poly (methyl methacrylate)J. Phys. Sci.20, (2009). 1–12.
13.
AsarNV, AlbayrakH, KorkmazT, TurkyilmazI.Influence of various metal oxides on mechanical and physical properties of heat-cured poly methyl methacrylate denture base resins. J. Adv. Prosthodont., 5, (2013) 241–247.
14.
AlharebAO, AhmedZA. Effect of Al2O3/ZrO2 reinforcement on the mechanical properties of PMMA denture base. J Reinf. Plast. Compos., 30, (2011) 86–93.
15.
AyadNM, BadawiMF, FatahAA. Effect of reinforcement of high impact acrylic resin with zirconia on some physical and mechanical properties. Rev. de Clin. Pesq. Odontol. set/dez. 4, (2008) 145–151.
16.
ChowWS, TayHK, AzlanA, IshakZAM. Mechanical and thermal properties of hydroxyapatite filled poly (methyl methacrylate) composites. Proc. Polym. Process Soc., 24, (2008) 15–19.
17.
QasimBS, Al KheraifAA, RamakrishaniahR.An investigation into the impact and flexural strength of light cure denture resin reinforced with carbon nanotubes. J. World Appl. Sci., 18, (2012) 808–812.
18.
YuW, WangX, TangQ, GuoM, ZhaoJ.Reinforcement of denture base PMMA with ZrO2 nanotubes. J. Mech. Behav. Biomed Mater., 32, (2014) 192–197.
19.
RahamnehA.Impact strength of acrylic resin denture base material after the addition of different fibers. J. Pak. Oral Dent., 29, (2009) 181–183.
20.
AroraN, JainV, ChawlaA, MathurVP. Effect of addition of sapphire (aluminium oxide or silver fillers on the flexural strength thermal diffusivity and water sorption of heat polymerized acrylic resins. Int. J. Prosthodont. Restor. Dent., 1, (2011) 21–27.
21.
MurakamiA, BehiriJC. Bonfield W. Rubber – modified bone cement. J. Mater. Sci., 23, (1988) 2029–2036.
22.
ISO-1567. (2001). Specification for denture base polymers.International Organization Standardization.British Standard (UK).
23.
ThamWL, ChowWS, IshakZAM. Effect of titanate coupling on the mechanical, thermal, and morphological properties of poly (methyl methacrylate)/ hydroxyapatite denture base composite. J. Compos. Mater., 45, (2011) 2335–2345.
24.
Al-HaddadA, RoudsariRV, SatterthwaiteJD. Fracture toughness of heat cured denture base acrylic resin modified with chlorhexidine and fluconazole as bioactive compounds. J. Dent., 42, (2014) 180–184.
25.
BandyopadhyayS, ChakrabortyS, AmetaR, MukhopadhyayR, DeuriAS. Application of FTIR in characterization of acrylonitrile-butadiene rubber (nitrile rubber). Polym. Test., 26, (2007) 38–41.
26.
ParkerJR, WabbellHW. Quantitative characterization of polymer structure by photoacoustic fourier transform infrared spectroscopy. J. Elast. Plast., 28, (1996) 140–160.
27.
KalaA, GunasekaranS, NatarajanRK. FTIR spectra and mechanical strength analysis of some selected rubber derivatives. Spectrochim. Acta, Part A., 68, (2007) 323–330.
28.
MarkovićGM., CincovićM., RadovanovićBJ, SimendićB.Studies of chemical interactions between chlorosulphonated polyethylene and nitrile rubber. Hem. Ind., 59, (2005) 324–326.
29.
JansenBJP, RastogiS, MeijerHEH, LemstraPJ. Rubber-modified glassy amorphouspolymers prepared via chemically induced phase separation.2.Mode of microscopic deformation studied by in-situ small-angle X-ray scattering during tensile deformation. Macromol., 34, (2001) 4007–4018.
30.
LimKLK, IshakZAM, IshiakuUS, FuadAMY, YusofAH, CziganyT, PukanzskyB, OgunniyiDS. High density polyethylene/ultrahigh molecular weight polyethylene blend. II. Effect of hydroxyapatite on processing, thermal and mechanical properties. J. Appl. Polym. Sci., 100, (2006) 3931–3942.
31.
JaggerDC, JaggerRG, AllenSM, HarrisonA.An investigation into the transverse and impact strength of high strength denture base acrylic resins. J Oral Rehab., 29, (2002) 263–267.
32.
BhatVS, NandishBT. Science of dental materials; clinical applications.India: CBS Publishers & Distributors (2006).
33.
SchneiderM, PithT, LamblaM.Toughening of polystyrene by natural rubber-based composite particles; part I impact reinforcement by PMMA and PS grafted core-shell particles. J Mater Sci., 32, (1997). 6331–6342.
34.
FernandaF, PanzaLHV, RenataCM, GarciaR, Altair ADBC. Impact and Flexural strength, and fracture morphology of acrylic resins with impact modifiers. J Open Dent., 3, (2009) 137–143.
FranklinP, WoodDJ, BubbNL. Reinforcement of poly (methyl methacrylate) denture base with glass flake. J. Dent. Mater., 21, (2005) 365–370.
37.
AndersonTL. Fracture mechanics; fundamentals and applications.USA: CRC Press Taylor & Francis Group LLC. (2005).
38.
HamzaT, WeeAG, AlapatiS, SchrickerSR. The fracture toughness of denture base material reinforced with different concentrations of POSS. J. Macromol. Sci.; part A -Pure Appl. Chem., 41, (2004) 897–906.
39.
GongS, BandyopadhyayS.Fracture properties and fracture surface morphologies in rubber-PMMA composites. J Mater Eng. Perform., 16, (2007) 607–613.
40.
WetzelB, RossoP, HaupertF, FriedrichK.Epoxy nanocomposite-fracture and toughening mechanisms. J. Eng. Fract. Mech., 73, (2006) 2375–2398.
41.
ChoK, YangJ, ParkCE. The effect rubber particles size on toughening behaviour of rubber-modified poly (methyl methacrylate) with different test methods. J. Polym., 39, (1998) 3073–3081.
BalosS, PilicB, MarkovicD, PavlicevicJ, LuzaninO.Poly(methyl methacrylate) nanocomposites with low silica addition. J. Prosthet. Dent., 111, (2014) 327–334.
44.
OkuyamaK, JoniM, NishiwakiT, IsoiS, KuribayashiR.Enhancement of the thermal stability and mechanical properties of a PMMA/aluminium trihydroxide composite synthesized via bead milling. J. Powder Technol., 204, (2010) 145–153.
