Depth of cure efficacy of high-power curing devices vs traditional halogen lamps.

Abstract

PURPOSE:

To determine the depth of cure resulting from three different curing devices in a photoactivated microhybrid composite through high-performance liquid chromatography (HPLC) analysis of leachable monomers.

MATERIALS AND METHODS:

Three different curing units, a halogen lamp (Heliolux, Vivadent), a xenon lamp (Kreative Kuring, Allyn Welch), and a plasma-arc lamp (Apollo 95, DMDS) were investigated using a universal microhybrid composite (P 60, 3M) as the test material. To assess the effect of curing device variation, a flexural strength test was performed. In addition, samples of composite were prepared and cured "in contact" (0 mm between the sample surface and light-guide tip) and through a specific thickness of composite (1, 2, or 3 mm). The monomers (bis-GMA and UDMA) eluted from the samples were detected by HPLC.

RESULTS:

No significant differences were found in the mechanical properties of composite cured with different light sources. In contrast, the concentration of eluted monomers (bis-GMA, UDMA) at a depth of 2 mm and more was significantly higher for the specimens cured with the high-power curing devices than those cured with the traditional halogen lamp.

CONCLUSION:

Under these experimental conditions, high-power curing devices were shown to be inferior in the deep polymerization of resin composite when compared to a traditional halogen lamp.

• Authors: Massimo Gagliani, Luigi Fadini, Jörg Michael Ritzmann
• Journal: The journal of adhesive dentistry (J Adhes Dent) Vol. 4 Issue 1 Pg. 41-7 ( 2002) ISSN: 1461-5185 [Print] Germany
• PMID: 12071628 (Publication Type: Journal Article)

Chemical References

• Composite Resins
• Methacrylates
• Polymers
• Polyurethanes
• urethane dimethacrylate luting resin
• Bisphenol A-Glycidyl Methacrylate

Topics

• Analysis of Variance
• Bisphenol A-Glycidyl Methacrylate (analysis, chemistry)
• Chromatography, High Pressure Liquid
• Composite Resins (analysis, chemistry, radiation effects)
• Dental Stress Analysis (instrumentation)
• Equipment Design
• Humans
• Light
• Lighting (instrumentation)
• Methacrylates (analysis, chemistry)
• Pliability
• Polymers (chemistry, radiation effects)
• Polyurethanes (analysis, chemistry)
• Statistics as Topic
• Surface Properties
• Time Factors