Relationship of the Light Intensity of Selected Light Curing Units with Varying Distance and Agulation of the Light Curing Tip and Lightmeter.
Background: The purpose of this study was to investigate the light intensity of selected light curing units with varying distance and angulation of the light curing tip and lightmeter. Materials and method: Four types of light units; Spectrum 800 (Dentsply), Coltulux 3 (Coltene), Elipar FreeLi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Malaya
2008
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/14088/ http://irep.iium.edu.my/14088/1/644.pdf |
| Summary: | Background: The purpose of this study was to
investigate the light intensity of selected light curing
units with varying distance and angulation of the
light curing tip and lightmeter.
Materials and method: Four types of light units;
Spectrum 800 (Dentsply), Coltulux 3 (Coltene),
Elipar FreeLight 2 (3M Espe) and Starlight Pro
(Mectron) were evaluated for light intensity at
various distances between the light curing tip and the
radiometer Cure Rite Denstply (0,1,3,5,10 and 15
mm). The light curing units were tested at right
angles to the aperture of the light meter and at the
angles of 45°, 60° to it at a standardized 5 mm
distance.
Results: The highest light intensity was obtained
when the tip of light curing unit was in contact with
the lightmeter aperture. The light intensity decreased
significantly when the light tip was placed 5mm,
10mm and 15mm away from the lightmeter aperture.
However, no significant differences (p> .05) were
detected between Omm, Imm and 3mm. There was
a decrease in light intensity when light~·tip was
angulated at 45° and 60° except for Coltolux 3.
Conclusions: The intensity of the curing light
was affected by the distance between the light curing
tip and the lightmeter. However, the decrease in light
intensity of the light curing unit was found not to
obey the inverse square law for the distances 0 to 15
mm.
The study found that there was no significant
difference between 45° and 60° angulation between
the light curing tip and the lightmeter. However, the
decrease in light intensity was significant when
compared to the light tip placed perpendicular (90°)
to the aperture of the light meter. |
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