Temperature increase during resin cement polymerization under a ceramic restoration: effect of type of curing unit.

Abstract

PURPOSE:

This study measured the temperature increase induced by various types of curing units during resin cement polymerization under ceramic restorations.

MATERIALS AND METHODS:

The resin cement was polymerized between a ceramic specimen (diameter 5 mm, height 2 mm) and a dentin disk (diameter 5 mm, height 1 mm) with a conventional halogen light, a high-intensity halogen light, a plasma-arc light, and a light-emitting diode unit. The temperature increase was measured under the dentin disk with a J-type thermocouple wire connected to a data logger. Ten measurements were carried out for each curing unit. Difference between starting and highest temperature readings was measured, and the 10 calculated temperature changes were averaged.

RESULTS:

Temperature increase varied significantly depending on curing unit used. The plasma-arc light induced significantly higher temperature increases than any other curing unit. The light-emitting diode unit produced the lowest temperature changes. There were no statistically significant differences between the conventional and high-intensity halogen curing units.

CONCLUSION:

Polymerization with curing units characterized by high energy output (plasma-arc light) caused higher temperature changes compared to other curing units, but the temperature increase detected was not viewed as critical for pulpal health.

• Authors: Aslihan Usumez, Nilgun Ozturk
• Journal: The International journal of prosthodontics (Int J Prosthodont) 2004 Mar-Apr Vol. 17 Issue 2 Pg. 200-4 ISSN: 0893-2174 [Print] United States
• PMID: 15119872 (Publication Type: Comparative Study, Journal Article)

Chemical References

• Halogens
• Polymers
• Resin Cements
• Dental Porcelain
• Variolink
• Xenon

Topics

• Analysis of Variance
• Dental Equipment
• Dental Porcelain
• Dental Restoration, Permanent (methods)
• Halogens
• Humans
• Inlays
• Light
• Molar
• Molecular Structure
• Phase Transition
• Polymers (chemistry)
• Resin Cements (chemistry, radiation effects)
• Statistics, Nonparametric
• Temperature
• Transducers
• Xenon