Clinical Oral Investigations

, Volume 13, Issue 3, pp 309–316 | Cite as

Temperature rise and degree of photopolymerization conversion of nanocomposites and conventional dental composites

Original Article

Abstract

The aim of the study was to investigate the temperature rise of a nanocomposite and a conventional hybrid dental composite during photopolymerization when cured with halogen curing lamp (QHT) and light-emitting diode (LED). Temperature rise during photopolymerization of two commercially available composites (Filtek Supreme® and TetricCeram®) were measured using a K-type thermocouple and a digital thermometer. Different curing modes were utilized to cure the composites: a high-intensity QHT unit (Optilux 501) in two different modes (standard and ramp), a low-intensity QHT unit (Coltolux 50), and an LED unit (Ultralume-2). Total temperature rise, polymerization reaction exotherm, and irradiation-induced temperature rise of the composites were determined. Degree of conversion of the specimens was measured using FTIR spectroscopy. The results revealed that the Filtek Supreme® nanocomposite showed lower temperature rise and degree of conversion in comparison with the hybrid composite (p < 0.05). It was also found that the LED curing unit induced considerable total and irradiation temperature rise without any improvement in the degree of conversion. Ramp curing mode showed lower temperature rise and delayed gel point and was found to be more effective than QHT standard mode and LED units. Although it is claimed that the LED curing units exhibit lower temperature rise during the photopolymerization, the present study showed that the curing units have no advantage over the conventional QHT units regarding the temperature rise and degree of polymerization conversion.

Keywords

Dental composites Temperature rise Degree of conversion Light-emitting diodes QHT units 

Notes

Conflict of interest

The authors declare that they have no conflict of interest.

References

  1. 1.
    Althoff O, Hartung M (2000) Advances in light curing. Am J Dent 13(special issue):77D–81DPubMedGoogle Scholar
  2. 2.
    Altintas SH, Yondem I, Tak O, Usumez A (2008) Temperature rise during polymerization of three different provisional materials. Clin Oral Investig 12(3):283–286PubMedCrossRefGoogle Scholar
  3. 3.
    Andrzejewska E (2001) Photopolymerization kinetics of multifunctional monomers. Prog Polym Sci 26(4):605–665CrossRefGoogle Scholar
  4. 4.
    Anseth KS, Wang CM, Bowman CN (1994) Kinetic evidence of reaction diffusion during the polymerization of multi (meth) acrylate monomers. Macromolecules 27:650–655CrossRefGoogle Scholar
  5. 5.
    Asmussen E, Peutzfeldt A (2005) Temperature rise induced by some light emitting diode and quartz–tungsten–halogen curing units. Eur J Oral Sci 113(1):96–98PubMedCrossRefGoogle Scholar
  6. 6.
    Asmussen E, Peutzfeldt A (2003) Light-emitting diode curing: Influence on selected properties of resin composites. Quintessence International 34(1):71–75PubMedGoogle Scholar
  7. 7.
    Atai M, Watts DC, Atai Z (2005) Shrinkage strain-rates of dental resin-monomer and composite systems. Biomaterials 26:5015–5020PubMedCrossRefGoogle Scholar
  8. 8.
    Atai M, Watts DC (2006) A new kinetic model for the photopolymerization shrinkage-strain of dental composites and resin-monomers. Dent Mater 22(8):785–791PubMedCrossRefGoogle Scholar
  9. 9.
    Baldissara P, Catapano S, Scotti R (1997) Clinical and histological evaluation of thermal injury thresholds in human teeth: a preliminary study. J Oral Rehabil 24(11):791–801PubMedCrossRefGoogle Scholar
  10. 10.
    Chung KH, Greener EH (1990) Correlation between degree of conversion, filler concentration and mechanical properties of posterior composite resins. J Oral Rehabil 17(5):487–494PubMedCrossRefGoogle Scholar
  11. 11.
    Davidson CL, Feilzer AJ (1997) Polymerization shrinkage and polymerization shrinkage stress in polymer-based restoratives. J Dent 25(6):435–440PubMedCrossRefGoogle Scholar
  12. 12.
    Dunn WJ, Bush AC (2002) A comparison of polymerization by light-emitting diode and halogen-based light-curing units. JADA 133(3):335–341PubMedGoogle Scholar
  13. 13.
    Goodis HE, White JM, Andrews J, Watanabe LG (1989) Measurement of temperature generated by visible-light-cure lamps in an in vitro model. Dent Mater 5(4):230–234PubMedCrossRefGoogle Scholar
  14. 14.
    Halvorson RH, Erickson RL, Davidson CL (2003) The effect of filler and silane content on conversion of resin-based composite. Dent Mater 19(4):327–333PubMedCrossRefGoogle Scholar
  15. 15.
    Hannig M, Bott B (1999) In-vitro pulp chamber temperature rise during composite resin polymerization with various light-curing sources. Dent Mater 15(4):275–281PubMedCrossRefGoogle Scholar
  16. 16.
    Hofmann N, Hugo B, Klaiber B (2002) Effect of irradiation type (LED or QTH) on photo-activated composite shrinkage strain kinetics, temperature rise, and hardness. Eur J Oral Sci 110(6):471–479PubMedCrossRefGoogle Scholar
  17. 17.
    Hussey DL, Biagioni PA, Lamey P-J (1995) Thermographic measurement of temperature change during resin composite polymerization in vivo. J Dent 23(5):267–271PubMedCrossRefGoogle Scholar
  18. 18.
    Ilie N, Kunzelmann K-H, Visvanathan A, Hickel R (2005) Curing behavior of a nanocomposite as a function of polymerization procedure. Dent Mater J 24(4):469–477PubMedGoogle Scholar
  19. 19.
    Jandt KD, Mills RW, Blackwell GB, Ashworth SH (2000) Depth of cure and compressive strength of dental composites cured with blue light emitting diodes (LEDs). Dent Mater 16(1):41–47PubMedCrossRefGoogle Scholar
  20. 20.
    Knežević A, Tarle Z, Meniga A, Šutalo J, Pichler G, Ristić M (2001) Degree of conversion and temperature rise during polymerization of composite resin samples with blue diodes. J Oral Rehabil 28(6):586–591PubMedCrossRefGoogle Scholar
  21. 21.
    Leonard DL, Charlton DG, Roberts HW, Cohen ME (2002) Polymerization efficiency of LED curing lights. J Esthet Restor Dent 14(5):286–295PubMedCrossRefGoogle Scholar
  22. 22.
    Lloyd CH, Joshi A, McGlynn E (1986) Temperature rises produced by light sources and composites during curing. Dent Mater 2(4):170–174PubMedCrossRefGoogle Scholar
  23. 23.
    Masutani S, Setcos JC, Schnell RJ, Phillips RW (1988) Temperature rise during polymerization of visible light-activated composite resins. Dent Mater 4(4):174–178PubMedCrossRefGoogle Scholar
  24. 24.
    Meyer GR, Ernst CP, Willershausen B (2002) Decrease in power output of new light-emitting diode (LED) curing devices with increasing distance to filling surface. J Adhes Dent 4(3):197–204PubMedGoogle Scholar
  25. 25.
    Mills RW, Jandt KD, Ashworth SH (1999) Dental composite depth of cure with halogen and blue light emitting diode technology. Br Dent J 186(8):388–391PubMedGoogle Scholar
  26. 26.
    Mills RW, Uhl A, Jandt KD (2002) Optical power outputs, spectra and dental composite depths of cure, obtained with blue light emitting diode (LED) and halogen light curing units (LCUs). Br Dent J 193(8):459–463PubMedCrossRefGoogle Scholar
  27. 27.
    Murchison DF, Moore BK (1992) Influence of curing time and distance on microhardness of eight light-cured liners. Oper Dent 17(4):135–141PubMedGoogle Scholar
  28. 28.
    Nomoto R, McCabe JF, Hirano S (2004) Comparison of halogen, plasma and LED curing units. Oper Dent 29(3):287–294PubMedGoogle Scholar
  29. 29.
    Nomura Y, Teshima W, Tanaka N, Yoshida Y, Nahara Y, Okazaki M (2002) Thermal analysis of dental resins cured with blue light-emitting diodes (LEDs). J Biomed Mater Res 63(2):209–213PubMedCrossRefGoogle Scholar
  30. 30.
    Porko C, Hietala EL (2001) Pulpal temperature change with visible light-curing. Oper Dent 26:181–185Google Scholar
  31. 31.
    Poulos JG, Styner DL (1997) Curing lights: changes in intensity output with use over time. Gen Dent 45(1):70–73PubMedGoogle Scholar
  32. 32.
    Schneider LF, Consani S, Correr–Sobrinho L, Correr AB, Sinhoreti MA (2006) Halogen and LED light curing of composite: temperature increase and Knoop hardness. Clin Oral Investig 10(1):66–71PubMedCrossRefGoogle Scholar
  33. 33.
    Shortall AC, Harrington E (1998) Temperature rise during polymerization of light-activated resin composites. J Oral Rehabil 25(12):908–913PubMedCrossRefGoogle Scholar
  34. 34.
    Smail SRJ, Patterson CJW, Mclundie AC, Strang R (1988) In vitro temperature rises during visible-light curing of a lining material and a posterior composite. J Oral Rehabil 15(4):361–366PubMedCrossRefGoogle Scholar
  35. 35.
    Soh MS, Yap AU, Yu T, Shen ZX (2004) Analysis of the degree of conversion of LED and halogen lights using micro-Raman spectroscopy. Oper Dent 29(5):571–577PubMedGoogle Scholar
  36. 36.
    Tarle Z, Meniga A, Knezevic A, Sutalo J, Ristic M, Pichler G (2002) Composite conversion and temperature rise using a conventional, plasma arc, and an experimental blue LED curing unit. J Oral Rehabil 29(7):662–667PubMedCrossRefGoogle Scholar
  37. 37.
    Uhl A, Mills RW, Jandt KD (2003) Polymerization and light-induced heat of dental composites cured with LED and halogen technology. Biomaterials 24(10):1809–1820PubMedCrossRefGoogle Scholar
  38. 38.
    Vandewalle KS, Roberts HW, Tiba A, Charlton DG (2005) Thermal emission and curing efficiency of LED and halogen curing lights. Oper Dent 30(2):257–264PubMedGoogle Scholar
  39. 39.
    Watts DC (2005) Reaction kinetics and mechanics in photo-polymerised networks. Dent Mater 21(1):27–35PubMedCrossRefGoogle Scholar
  40. 40.
    Yap AU, Soh MS (2003) Thermal emission by different light-curing units. Oper Dent 28(3):260–266PubMedGoogle Scholar
  41. 41.
    Zach L, Cohen G (1965) Pulp response to externally applied heat. Oral Surg Oral Med Oral Pathol 19:515–530PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.Iran Polymer and Petrochemical Institute (IPPI)TehranIran
  2. 2.Dental SchoolTehran University of Medical SciencesTehranIran

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