Effect of light-curing units on the thermal expansion of resin nanocomposites

Jeong Kil Park, Bock Hur, Ching Chang Ko, Franklin Garcia-Godoy, Hyung I.L. Kim, Yong Hoon Kwon

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Purpose: To examine the thermal expansion of resin nanocomposites after light-curing using different light-curing units. Methods: Four different resin nanocomposites and four different light-curing units [quartz-tungstenhalogen (QTH), light emitting diode (LED), laser, and plasma arc] were chosen. Metal dies were filled with resin to make specimens and light-cured. The light intensity and light-curing time of the QTH and LED light-curing units were 1000 mW/cm2 and 40 seconds, 700 mW/cm2 and 40 seconds for the laser, and 1600 mW/cm2 and 3 seconds for the plasma arc. The coefficient of thermal expansion (CTE) was evaluated using a thermomechanical analyzer (TMA) at temperatures ranging from 30-80°C. Results: The CTE of the resin nanocomposites tested ranged from 28.5 to 65.8 (×10 -6/°C), depending on the product and type of light-curing unit used. Among the specimens, Grandio showed the lowest CTE. The specimens cured using the plasma arc unit (Apollo 95E) showed the highest CTE. There was a linear correlation between the CTE and filler content (vol%) (R: -0.94∼-0.99 depending on the light-curing unit). The results may suggest a careful selection of the light-curing unit because there was more expansion in the specimens cured using the plasma arc unit than those cured by the other units.

Original languageEnglish (US)
Pages (from-to)331-334
Number of pages4
JournalAmerican journal of dentistry
Volume23
Issue number6
StatePublished - Dec 1 2010

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Nanocomposites
Hot Temperature
Light
Quartz
Semiconductor Lasers
Lasers
Metals

All Science Journal Classification (ASJC) codes

  • Dentistry(all)

Cite this

Park, J. K., Hur, B., Ko, C. C., Garcia-Godoy, F., Kim, H. I. L., & Kwon, Y. H. (2010). Effect of light-curing units on the thermal expansion of resin nanocomposites. American journal of dentistry, 23(6), 331-334.

Effect of light-curing units on the thermal expansion of resin nanocomposites. / Park, Jeong Kil; Hur, Bock; Ko, Ching Chang; Garcia-Godoy, Franklin; Kim, Hyung I.L.; Kwon, Yong Hoon.

In: American journal of dentistry, Vol. 23, No. 6, 01.12.2010, p. 331-334.

Research output: Contribution to journalArticle

Park, JK, Hur, B, Ko, CC, Garcia-Godoy, F, Kim, HIL & Kwon, YH 2010, 'Effect of light-curing units on the thermal expansion of resin nanocomposites', American journal of dentistry, vol. 23, no. 6, pp. 331-334.
Park, Jeong Kil ; Hur, Bock ; Ko, Ching Chang ; Garcia-Godoy, Franklin ; Kim, Hyung I.L. ; Kwon, Yong Hoon. / Effect of light-curing units on the thermal expansion of resin nanocomposites. In: American journal of dentistry. 2010 ; Vol. 23, No. 6. pp. 331-334.
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