Citation Information :
Elghandour IA. Use of Resin Solvent as a Facilitator for Removal of Resin Composite Restoratives by Influencing their Mechanical Properties: Is this Possible?. J Oper Dent Endod 2019; 4 (1):1-5.
Aim: The aim is to evaluate the influence of resin solvent on Vickers microhardness, flexural strength, and flexural modulus of a resin composite in order to test the ability of resin solvent to soften or weaken resin composite during replacement of failed restoration.
Materials and methods: Fifty specimens were prepared from Tetric N-Ceram; forty used for flexural strength and elastic modulus tests and ten used for microhardness test. For flexural strength; they were divided into four groups of ten specimens each; in first group; specimens were not subjected to resin solvent (control), in second, third and fourth groups; specimens were subjected to resin solvent for 1, 3, and 5 minutes respectively. For microhardness, specimens were examined before after application of resin solvent for 1, 3, and 5 minutes with a total of forty readings. Collected data were statistically analyzed.
Results: Resin solvent was found to reduce significantly the flexure strength of Tetric N-Ceram compared to the control group. Differences in flexure strength between 1, 3, and 5 minutes applications were statistically nonsignificant. For elastic modulus and microhardness, the influence of resin solvent on resin composite was statistically nonsignificant.
Conclusion: Resin solvent weakens the flexural strength of resin composite but did not affect its microhardness or elastic modulus. Increasing the time of application from 1, 3, and 5 minutes did not further reduce the flexural strength.
Clinical significance: Resin solvent had shown promising potentials to reduce the strength and hence facilitate removal of failed composite restoration during replacement.
Villalta P, Lu H, et al. Effects of staining and bleaching on color change of dental composite resins. J Prosthet Dent 2006;95:137–142. DOI: 10.1016/j.prosdent.2005.11.019.
Abdallah MN, Light N, et al. Development of a composite resin disclosing agent based on the understanding of tooth staining mechanisms. J Dent 2014;42:697–708. DOI: 10.1016/j.jdent.2014.03.004.
Meller C, Klein C. Fluorescence properties of commercial composite resin restorative materials in dentistry. Dent Mater 2012;31:916–923. DOI: 10.4012/dmj.2012-079.
Chadwick RG. Thermocycling – the effects upon the compressive strength and abrasion resistance of three resin composites. J Oral Rehabil 1994;21:533–543. DOI: 10.1111/j.1365-2842.1994.tb01167.x.
Inagaki LT, Dainezi VB, et al. Evaluation of sorption/solubility, softening, flexural strength and elastic modulus of experimental resin blends with chlorhexidine. J Dent 2016;49:40–45. DOI: 10.1016/j.jdent.2016.04.006.
Mohammadi E, Pishevar L, et al. Effect of food simulating liquids on the flexural strength of a methacrylate and silorane-based composite. PLoS One 2017;12:e0188829. DOI: 10.1371/journal.pone.0188829.
Punia SK, Nadig P, et al. An in vitro assessment of apical microleakage in root canals obturated with gutta-flow, resilon, thermafil and lateral condensation: a stereomicroscopic study. J Conserv Dent 2011;14:173–177. DOI: 10.4103/0972-0707.82629.
Martos J, Gastal MT, et al. Dissolving efficacy of organic solvents on root canal sealers. Clin Oral Invest 2006;10:50–54. DOI: 10.1007/s00784-005-0023-2.
Johann JE, Martos J, et al. Use of organic solvents in endodontics: a review. Clin Pesq Odontol Curitiba 2006;2:393–399.
Saglam BC, Kocak MM, et al. Efficacy of different solvents in removing gutta-percha from curved root canals: A micro-computed tomography study. Aust Endod J 2014;40:76–80. DOI: 10.1111/aej.12041.
Shenoi PR, Badole GP, et al. Evaluation of softening ability of Xylene & Endosolv-R on three different epoxy resin based sealers within 1 to 2 minutes-an in vitro study. Restor Dent Endod 2014;39: 17–23. DOI: 10.5395/rde.2014.39.1.17.
Mushtaq M, Farooq R, et al. Dissolving efficacy of different organic solvents on gutta-percha and resilon root canal obturating materials at different immersion time intervals. J Conserv Dent 2012;15:141–145. DOI: 10.4103/0972-0707.94584.
International Standards Organization. ISO 4049 Dentistry – Polymer-based filling, restorative and luting materials; 2009.
Meenakumari C, Bhat KM, et al. Evaluation of mechanical properties of newer nanoposterior restorative resin composites: An In vitro study. Contemp Clin Dent 2018;9:S142–S146. DOI: 10.4103/ccd.ccd_160_18.
Ilie N, Hilton TJ, et al. Academy of Dental Materials guidance-Resin composites: Part I-Mechanical properties. Dent Mater 2017;33: 880–894. DOI: 10.1016/j.dental.2017.04.013.
Feitosa VP, Fugolin APP, et al. Effects of different photo-polymerization protocols on resin-dentine mTBS, mechanical properties and cross-link density of a nano-filled resin composite. J Dent 2012;40:802–809. DOI: 10.1016/j.jdent.2012.05.014.
Lee SY, Greener EH, et al. Effect of food and oral simulating fluids on structure of adhesive composite systems. J Dent 1995;23:27–35. DOI: 10.1016/0300-5712(95)90657-4.
Asmussen E, Uno S. Solubility Parameters, Fractional Polarities, and Bond Strengths of Some Intermediary Resins Used in Dentin Bonding. J Dent Res 1993;72:558–565. DOI: 10.1177/00220345930720030101.
Cruickshank EJ, Chadwick RG. Can chemical softening agents minimize cavity enlargement during removal of failed anterior resin composite restorations? J Oral Rehabil 1998;25:167–173. DOI: 10.1046/j.1365-2842.1998.00226.x.
Randolph LD, Palin WM, et al. Filler characteristics of modern dental resin composites and their influence on physico-mechanical properties. Dent Mater 2016;32:1586–1599. DOI: 10.1016/j.dental. 2016.09.034.
Gundogdu M, Kurklu D, et al. The Evaluation of Flexural Strength of Composite Resin Materials with and without Fiber. Dent 2014;4: 259–265. DOI: 10.4172/2161-1122.1000259.
Oberholzer TG, Grobler SR, et al. The effects of light intensity and method of exposure on the hardness of four light-cured dental restorative materials. Int Dent J 2003;53:211–215. DOI: 10.1111/j.1875-595X.2003.tb00747.x.
Soderholm KJ, Lambrechts P, et al. Clinical wear performance of eight experimental dental composites over three years determined by two measuring methods. Eur J Oral Sci 2001;109:273–281. DOI: 10.1034/j.1600-0722.2001.00064.x.
Patel SB, Gordan VV, et al. The effect of surface finishing and storage solutions on the color stability of resin-based composites. J Am Dental Assoc 2004;135:587–594. DOI: 10.14219/jada.archive.2004.0246.
Moon JD, Seon EM, et al. Effect of immersion into solutions at various pH on the color stability of composite resins with different shades. Restor Dent Endod 2015;40:270–276. DOI: 10.5395/rde.2015.40.4.270.
Xavier AM, Sunny SM, et al. Repeated exposure of acidic beverages on esthetic restorative materials: an in-vitro surface microhardness study. J Clin Exp Dent 2016;8:e312–e317. DOI: 10.4317/jced.52906.
Rajavardhan K, Sankar A, et al. Erosive potential of cola and orange fruit juice on tooth colored restorative materials. Ann Med Health Sci Res 2014;4:S208–S212. DOI: 10.4103/2141-9248.141960.
Sabbagh J, Nabbout F, et al. The effect of expiration date on mechanical properties of resin composites. J Int Soc Prevent Communit Dent 2018;8:99–103. DOI: 10.4103/jispcd.JISPCD_445_17.
Lima RBW, Gómez FM, et al. Bulk-fill resin composites: Mechanical properties vs depth of cure. 2016;32:e20–e21.