Format

Send to

Choose Destination
Int J Paediatr Dent. 2009 Jan;19(1):48-54. doi: 10.1111/j.1365-263X.2007.00899.x. Epub 2008 Feb 19.

In vitro pulp chamber temperature rise from irradiation and exotherm of flowable composites.

Author information

1
Department of Paediatric Dentistry, School of Dentistry, University of Al-Baath, Hama, Syria. d_kusai@yahoo.co.uk

Abstract

OBJECTIVE:

The aim of this study was to investigate the pulpal temperature rise induced during the polymerization of flowable and non-flowable composites using light-emitting diode (LED) and halogen (quartz-tungsten-halogen) light-curing units (LCUs).

METHODS:

Five flowable and three non-flowable composites were examined. Pulpal temperature changes were recorded over 10 min in a sample primary tooth by a thermocouple. A conventional quartz-tungsten-halogen source and two LEDs, one of which was programmable, were used for light curing the resin composites. Three repetitions per material were made for each LCU.

RESULTS:

There was a wide range of temperature rises among the materials (P < 0.05). Temperature rises ranged between 1.3 degrees C for Filtek Supreme irradiated by low-power LED and 4.5 degrees C for Grandio Flow irradiated by high-power LED. The highest temperature rises were observed with both the LED high-power and soft-start LCUs. The time to reach the exothermic peak varied significantly between the materials (P < 0.05).

CONCLUSIONS:

Pulpal temperature rise is related to both the radiant energy output from LCUs and the polymerization exotherm of resin composites. A greater potential risk for heat-induced pulp damage might be associated with high-power LED sources. Flowable composites exhibited higher temperature rises than non-flowable materials, because of higher resin contents.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center