International Journal of Experimental Dental Science

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VOLUME 9 , ISSUE 2 ( July-December, 2020 ) > List of Articles


Influence of Bulk-fill, Flowable, and Dual-cure Resin Restorative Materials on Intrapulpal Thermal Changes during Polymerization with Light-curing Units at Curing Tip Distance

Vanga V Narsimha Rao, Chandrabhatla S Kumar

Citation Information : Narsimha Rao VV, Kumar CS. Influence of Bulk-fill, Flowable, and Dual-cure Resin Restorative Materials on Intrapulpal Thermal Changes during Polymerization with Light-curing Units at Curing Tip Distance. Int J Experiment Dent Sci 2020; 9 (2):56-61.

DOI: 10.5005/jp-journals-10029-1212

License: CC BY-NC 4.0

Published Online: 01-12-2020

Copyright Statement:  Copyright © 2020; The Author(s).


Aim and objective: The purpose of the study was to evaluate the temperature changes in the pulp chamber that occur during the polymerization of bulk-fill, flowable bulk-fill, and dual-cure resin restorative materials influenced by various light-curing devices at different curing tip distances. Materials and methods: In the present in vitro study, dentin discs of 1 mm thick and Teflon molds with a cylindrical cavity of 2 mm diameter with lengths of 3, 4, and 5 mm were used to simulate tooth structure with a prepared occlusal cavity. Teflon molds were restored with 2 mm Spectrum (universal microhybrid composite Dentsply), Tetric N flow (Bulk Fill Ivoclar-Vivadent), and Cention N (self-curing resin based with light-curing option Ivoclar-Vivadent), respectively, the remaining difference in the length of the Teflon mold depicts the curing tip distance for the light-curing units. Process of photopolymerization was done with LEDition Ivoclar-Vivadent and 3M™ ESPE™ Elipar™ 2500 halogen curing unit at curing tip distances of 1, 2, and 3 mm, respectively. The thermal changes below the dentin discs were recorded on the K-type digital thermocouple (DT-302-1 HTC). These values obtained were tabulated and submitted to statistical analysis using analysis of variance (ANOVA) and Tukey's multiple post hoc procedures. Results: Significant differences were observed in the temperature rise among bulk-fill, flowable bulk-fill, and dual-cure resin (p < 0.05). Halogen curing unit exhibited significantly higher temperature rise than LEDition (p < 0.05). The smallest rise in temperature was observed in Spectrum composite with LEDition. Conclusion: The polymerization process and the amount of temperature rise are important in pulpal health. Even though there was a significant rise in temperature of the pulp, it had no significance in causing irreversible changes to the underlying tooth structures, which is attributed to improved properties of the materials.

  1. Mangat P, Dhingra A, Bhardwaj G. Curing lights and the science behind them - an overview. IOSR-JDMS [Internet] 2014;13(12):35–39. DOI: 10.9790/0853-131243539Available from: 250717030/Curing-Lights-and-the-science-behind-them-An-Overview.
  2. Jung H, Friedl KH, Hiller KA, et al. Polymerization efficiency of different photocuring units through ceramic discs. Oper Dent 2006;31(1):68–77. DOI: 10.2341/04-188.
  3. Price RB, Ferracane JL, Shortall AC. Light-curing units: a review of what we need to know. J Dent Res 2015;94(9):1179–1186. DOI: 10.1177/0022034515594786.
  4. Ilday NO, Sagsoz O, Karatas O, et al. Temperature changes caused by light curing of fiber-reinforced composite resins. J Conserv Dent 2015;18(3):223–226. DOI: 10.4103/0972-0707.157258.
  5. Mouhat M, Mercer J, Stangvaltaite L, et al. Light-curing units used in dentistry: factors associated with heat development-potential risk for patients. Clin Oral Investig 2017;21(5):1687–1696. DOI: 10.1007/s00784-016-1962-5.
  6. Peutzfeldt A, Lussi A, Flury S. Effect of high-irradiance light-curing on micromechanical properties of resin cements. Biomed Res Int 2016;2016:4894653. DOI: 10.1155/2016/4894653.
  7. Lopez JV, Gomez MAC, Oronia MAR, et al. Analysis and simulation of heat transfer in human tooth during the curing of orthodontic appliance and food ingestion. APOS Trends Orthodont [Internet] 2016;6(3):137–146. DOI: 10.4103/2321-1407.183153Available from;year=2016;volume=6;issue=3;spage=137;epage=146;aulast=Velazquez-Lopez;type=2.
  8. Yu C, Abbott PV. An overview of the dental pulp: its functions and responses to injury. Aust Dent J 2007;52(1 Suppl):S4–S16. DOI: 10.1111/j.1834-7819.2007.tb00525.x.
  9. Armellin E, Bovesecchi G, Coppa P, et al. LED curing lights and temperature changes in different tooth sites. Biomed Res Int 2016;2016:1894672. DOI: 10.1155/2016/1894672.
  10. Uzel A, Buyukyilmaz T, Kayalioglu M, et al. Temperature rise during orthodontic bonding with various light-curing units--an in vitro study. Angle Orthod 2006;76(2):330–334.
  11. Xu HH. Dental composite resins containing silica-fused ceramic single-crystalline whiskers with various filler levels. J Dent Res 1999;78(7):1304–1311. DOI: 10.1177/00220345990780070401.
  12. Matthews B, Andrew D. Microvascular architecture and exchange in teeth. Microcirculation 1995;2(4):305–313. DOI: 10.3109/10739689509148275.
  13. Zach L, Cohen G. Pulp response to externally applied heat. Oral Surg Oral Med Oral Pathol 1965;19(4):515–530. DOI: 10.1016/0030-4220(65)90015-0.
  14. Knezevic A, Tarle Z, Meniga A, et al. Degree of conversion and temperature measurement of composite polymerized with halogen and LED-curing unit. Actastomatolog Croat [Internet] 2003;37(2):165–168. Available from:
  15. Raab WH. Temperature related changes in pulpal microcirculation. Proc Finn Dent Soc 1992;88(Suppl 1):469–479.
  16. Hervas-Garcia A, Martinez-Lozano MA, Cabanes-Vila J, et al. Composite resins. A review of the materials and clinical indications. Med Oral Patol Oral Cir Bucal 2006;11(2):E215–E220.
  17. Knezevic A, Tarle Z, Meniga A, et al. Photopolymerization of composite resins with plasma light. J Oral Rehabil 2002;29(8):782–786. DOI: 10.1046/j.1365-2842.2002.00897.x.
  18. Oliveira M, Cesar PF, Giannini M, et al. Effect of temperature on the degree of conversion and working time of dual-cured resin cements exposed to different curing conditions. Oper Dent 2012;37(4):370–379. DOI: 10.2341/11-198-L.
  19. Pilo R, Oelgiesser D, Cardash HS. A survey of output intensity and potential for depth of cure among light-curing units in clinical use. J Dent 1999;27(3):235–241. DOI: 10.1016/S0300-5712(98)00052-9.
  20. Berzins DW, Abey S, Costache MC, et al. Resin-modified glass-ionomer setting reaction competition. J Dent Res 2010;89(1):82–86. DOI: 10.1177/0022034509355919.
  21. Kahvecioglu F, Tosun G, Ulker HE. Intrapulpal thermal changes during setting reaction of glass Carbomer® using Thermocure lamp. Biomed Res Int 2016;2016:5173805. DOI: 10.1155/2016/5173805.
  22. Mousavinasab SM, Salehi A, Salehi N. Effect of composite shade, curing time and mode on temperature rise of silorane and methacrylate-based composite resins. Caspian J Dent Res [Internet] 2016;5(2):50–58. Available from:
  23. Emami N, Sjodahl M, Soderholm KJ. How filler properties, filler fraction, sample thickness and light source affect light attenuation in particulate filled resin composites. Dent Mat 2005;21(8):721–730. DOI: 10.1016/
  24. Vita Zahnfabrik H, Rauter GmbH & Co [Internet]. Germany: DENTSPLY DeTrey GmbH;.Spectrum®TPH®: [cited 2017 Nov]; [about 7 p.]. Available from: __2/dentalmed__2__2970d8a6e5bf9c6b991d0c7b1729b98f.pdf.
  25. Karatas O, Turel V, Bayindir YZ. Temperature rise during polymerization of different cavity liners and composite resins. J Conserv Dent 2015;18(6):431–435. DOI: 10.4103/0972-0707.168795.
  26. Souza-Junior EJ, Prieto LT, Soares GP, et al. The effect of curing light and chemical catalyst on the degree of conversion of two dual cured resin luting cements. Lasers Med Sci 2012;27(1):145–151. DOI: 10.1007/s10103-010-0857-y.
  27. Zimmerli B, Strub M, Jeger F, et al. Composite materials: composition, properties and clinical applications. A literature review. Schweiz Monatsschr Zahnmed 2010;120(11):972–986.
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