J Korean Acad Conserv Dent.  2010 Sep;35(5):368-373. 10.5395/JKACD.2010.35.5.368.

Effect of infection control barrier thickness on light curing units

• Chang HS
• Lee SR
• Hong SO
• Ryu HW
• Song CK
• Min KS

• KMID: 2176435
• DOI: http://doi.org/10.5395/JKACD.2010.35.5.368

Abstract

OBJECTIVES
This study investigated the effect of infection control barrier thickness on power density, wavelength, and light diffusion of light curing units.
MATERIALS AND METHODS
Infection control barrier (Cleanwrap) in one-fold, two-fold, four-fold, and eight-fold, and a halogen light curing unit (Optilux 360) and a light emitting diode (LED) light curing unit (Elipar FreeLight 2) were used in this study. Power density of light curing units with infection control barriers covering the fiberoptic bundle was measured with a hand held dental radiometer (Cure Rite). Wavelength of light curing units fixed on a custom made optical breadboard was measured with a portable spectroradiometer (CS-1000). Light diffusion of light curing units was photographed with DSLR (Nikon D70s) as above.
RESULTS
Power density decreased significantly as the layer thickness of the infection control barrier increased, except the one-fold and two-fold in halogen light curing unit. Especially, when the barrier was four-fold and more in the halogen light curing unit, the decrease of power density was more prominent. The wavelength of light curing units was not affected by the barriers and almost no change was detected in the peak wavelength. Light diffusion of LED light curing unit was not affected by barriers, however, halogen light curing unit showed decrease in light diffusion angle when the barrier was four-fold and statistically different decrease when the barrier was eight-fold (p < 0.05).
CONCLUSIONS
It could be assumed that the infection control barriers should be used as two-fold rather than one-fold to prevent tearing of the barriers and subsequent cross contamination between the patients.

Keyword

Infection control barrier; Light diffusion; Peak wavelength; Power density; Radiometer; Spectroradiometer

MeSH Terms

Diffusion
Enzyme Multiplied Immunoassay Technique
Hand
Humans
Infection Control
Light

Figure

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  Figure 1 Wavelength (nm) of LED light curing unit with infection control barriers covering the filberoptic bundle.

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  Figure 2 Wavelength (nm) of halogen light curing unit with infection control barriers covering the filberoptic bundle.

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  Figure 3 Light diffusion from LED light curing unit with infection control barriers covering the fiberoptic bundle.

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  Figure 4 Light diffusion from halogen light curing unit with infection control barriers covering the fiberoptic bundle.

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