The Effect of Pre-heating Silorane-based Composite Resin on Marginal Gap Formation of Class V Restorations
Statement of problem: Many efforts have been made to solve the problem of composite resin adaptation and reduce microleakage.
Objective: The aim of the present study was to evaluate the effect of preheating of silorane-based composite resins before photo-polymerization on gap formation at the margins of Class V restorations.
Materials and Methods: Standard Class V cavities were prepared on the labial surfaces of 46 sound bovine incisor teeth. The teeth were divided into two groups. In group 1, after application of the bonding agent of the silorane system, the cavities were restored with Filtek silorane-based composite resin stored at room temperature. In group 2, before restoring the cavities, the silorane-based composite resin was heated in a warm water bath at 54ºC for 10 minutes. After 48 hours of storage in distilled water, teeth were thermocycled and sectioned bucco-lingually. Then the gaps of tooth‒restoration interfaces in both incisal and gingival margins at three external, middle and internal areas were measured using a stereomicroscope. After calculation of means and standard deviations, data were analyzed with two-factor ANOVA at α=0.05.
Results: The mean marginal gaps in non-preheated and preheated groups were 10.66±2.39 and 7.62±2.05 µm, respectively, with a statistically significant difference (P<0.001). However, the differences between the occlusal and gingival margins in each group were not significant (P=0.58). The interactive effect of preheating and margin type was not significant (P=0.10).
Conclusions: Heating silorane-based composite resin before light curing resulted in decreasing the gap sizes at tooth‒restoration interfaces in Class V cavities.
Uctasli MB, Arisu HD, Lasilla LVJ, et al. Effect of preheating on the mechanical properties of resin composites. Eur J Dent. 2008; 2: 263-268.
Choudhary N, Kamat S, Mangala TM, et al. Effect of pre-heating composite resin on gap formation at three different temperatures. J Conserv Dent. 2011; 14: 191-195.
Acquaviva PA, Cerutti F, Adami G, et al. Degree of conversion of three composite materials employed in the adhesive cementation of indirect restorations: a micro-Raman analysis. J Dent. 2009; 37: 610-615.
Nada K, El-Mowafy O. Effect of precuring warming on mechanical properties of restorative composites. Int J Dent. 2011; 2011: 1-5.
Wagner WC, Aksu MN, Neme AM, et al. Effect of pre-heating resin composite on restoration microleakage. Oper Dent. 2008; 33: 72-78.
Arslan S DS, Zorba YO, Ucar FI, et al. The effect of pre-heating silorane and methacrylate-based composites on microleakage of class V restorations. Eur J Gen Dent. 2012; 1: 178-182.
Mitthra S, Rajkumar K, Mahalaxmi S . Evaluation of polymerization shrinkage, polymerization shrinkage stress, wear resistance, and compressive strength of a silorane-based composite: A finite element analysis study. Indian J Res Dent. 2017; 28:375-379.
Sivakumar JS, Prasad AS, Soundappan S, et al. A comparative evaluation of microleakage of restorations using silorane-based dental composite and methacrylate-based dental composites in Class II cavities: An in vitro study. J Pharm Bioallied Sci. 2016; 8:S81-S85.
Daronch M RF, Moss L, De Goes F. Clinically relevant issues related to preheating composites. Esthet Restor Dent. 2006; 18: 340-351.
Blalock JS,Holmes RG, Rueggeberg FA. Effect of temperature on unpolymerized composite film thickness. J Prosthet Dent. 2006; 96: 424-432.
Knight JS,Fraughn R, Norrington D. Effect of temperature on the flow properties of resin composite. Gen Dent.2006; 54: 14-16.
Freedman G, Krecji I. Warming up to composites. Compend Contin Educ Dent 2004; 25: 371-374.
Freedman PD. Clinical benefits of pre-warmed composites. Private Dent. 2003; 8: 111-114.
Daronch M,Rueggeberg FA, De Goes MF, et al. Polymerization kinetics of pre-heated composites. J Dent Res. 2006; 85: 38-43.
Dionysopoulos D, Tolidis K, Gerasimou P, et al. Effect of preheating on the film thickness of contemporary composite restorative materials. J Dent Sci. 2014; 9:313–319.
Daronch M, Rueggeberg FA, De Goes MF. Monomer conversion of preheated composite. J Dent Res.2005; 84: 663-667.
Trujillo M NS, Stansbury JW. Use of near-IR to monitor the influence of external heating on dental composite photopolymerization.Dent Mater. 2004;20:760-777.
Labella R. Lambrechts P, Van Meerbeek B, et al. Polymerization shrinkage and elasticity of flowable composites and filled adhesives. Dent Mater. 1997; 15:128-137.
Duarte S Jr, Botta AC, Meire M, et al. Microtensile bond strength & scanning electron microscopic evaluation of self-adhesive and self-etch resin cements to intact & etched enamel.J Prosthet Dent. 2008; 100: 203-210.
Lovell LG, Lu H, Elliott JE, et al. The effect of cure rate on the mechanical properties of dental resins. Dent Mater. 2001; 17: 504-511.
Lovell LG, Newman SM, Bowman CN. The effect of light intensity, temperature and comonomer composition on the polymerization behavior of dimethacrylate dental resins.J Dent Res. 1999; 78: 1469-1476.
Asmussen E. Factors affecting the color stability of restorative resins. Acta Odontol Scand. 1983; 41: 11-18.
Schneider LF, Pfeifer CS, Consani S, et al.Influence of photoinitiator type on the rate of polymerization, degree of conversion, hardness and yellowing of dental resin composites. Dent Mater. 2008; 24: 1169-1177.
Sensi LG, Marson FC, Baratieri LN, et al. Effect of placement techniques on the marginal adaptation of class V composite restorations. Contemp Dent Pract. 2005; 6:17-25.
Buonocore MG. A simple method of increasing the adhesion of acrylic filling materials to enamel surfaces. J Dent Res. 1995; 34: 849-853.
Froes- Salgado NR, Maria SL, Kawano Y, et al.Composite pre-heating: Effects on marginal adaptation, degree of conversion and mechanical properties.Dent Mater.2010; 26: 908-914.
Demirbuga S, Ucar FI, Cayabatmaz M, et al. Microshear bond strength of preheated silorane- and methacrylate-based composite resins to dentin. Scanning. 2016; 38:63-9.
Alizadeh Oskoee P, Pournaghi Azar F, Jafari Navimipour E,et al. The effect of repeated preheating of dimethacrylate and silorane-based composite resins on marginal gap of class V restorations. J Dent Res Dent Clin Dent Prospects. 2017; 11:36-42.
Lohbauer U, Zenelis S, Rahiotis C, et al.The effect of resin composites pre-heating on monomer conversion and polymerization shrinkage. Dent Mater. 2009; 25:514-519.
Sidu SK, Carrick TE, McCabe JF. Temperature mediated coefficient of dimensional change of dental tooth-colored restorative materials. Dent Mater. 2004; 20: 435-440.
Deb S, Di Silvio L, Mackler HE, et al. Pre-warming of dental composite. Dent Mater. 2011; 27: e51-e59.
Elhejazi AA. The effects of temperature and light intensity on the polymerization shrinkage of light-cured composite filling materials. J Contemp Dent Pract. 2006; 7:12–21.
Zhao S, Qian Y, Liu H, et al. The effect of preheating on light cured resin composites. J Hard Tissue Biol 2012; 21:273-2788.
Sharafeddin F, Motamedi M, Fattah Z. Effect of Preheating and Precooling on the Flexural Strength and Modulus of Elasticity of Nanohybrid and Silorane-based Composite. J Dent (Shiraz). 2015;16:224-9.
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