Temperature rise beneath a light–cured materials using two types of curing machines
Abstract Aim: To measure the temperature rise induced by a light emitting diode (LED) curing unit and by quartz tungsten halogen (QTH) curing unit using two types of composite resin XRV Herculite and Venus. Materials and Methods: Forty extracted non–carious single canal premolars were cleaned and...
| Main Authors: | , |
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| Format: | Article |
| Language: | Arabic |
| Published: |
University of Mosul, College of Dentistry
2006-01-01
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| Series: | Al-Rafidain Dental Journal |
| Subjects: | |
| Online Access: | https://rden.mosuljournals.com/pdf_40180_6074ac5e6bc8ccdb40b7f1e4c0d2a210.html |
| Summary: | Abstract
Aim: To measure the temperature rise induced by a light emitting diode (LED) curing unit and by
quartz tungsten halogen (QTH) curing unit using two types of composite resin XRV Herculite and
Venus. Materials and Methods: Forty extracted non–carious single canal premolars were cleaned and
bisected longitudinally. Class V preparations were cut on the buccal surfaces. The teeth were divided
into four groups; each of ten. The teeth in the first and second groups were restored with XR–Herculite
composite resin. The teeth in the third and fourth groups were restored with Venus composite resin.
The composite resin in the first and third groups were polymerized using QTH curing unit “Astralis”
for 40 seconds; the light intensity was 502 mW/cm2. The distance between the tip of the light and the
composite was 3 + 1 mm. The composite resin in the second and fourth groups was polymerized using
LEDs “Ultra–Lite 200 E plus” curing unit for 20 seconds; the light intensity was 536 mW/cm2 using
the same distance as the first and third groups. The temperature rise at the pulpal wall was recorded by
placing a thermocouple on the pulpal wall directly under the restoration. Results: The lowest
temperature rise during LED irradiation with Venus composite resin followed by LED irradiation with
XRV Herculite composite resin. Whereas QTH curing units with XRV Herculite composite resin
produced higher values, QTH curing units with Venus composite resin produced the highest
temperature rise. Conclusion: The temperature rise of LED curing units and QTH curing units used in
this study was under the limits that affect the integrity of the dental pulp. |
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| ISSN: | 1812-1217 1998-0345 |