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.
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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)
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Chemical References |
- Halogens
- Polymers
- Resin Cements
- Dental Porcelain
- Variolink
- Xenon
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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
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