Comparison of microleakages of photo-cured composites using three different light sources: halogen lamp, LED and argon laser: an in vitro study.
In this study, we compared the microleakage of composite fillings cured with halogen bulb, LED and argon ion laser (488 nm). Twenty-four extracted human molars were divided randomly in three groups. Six cavities were prepared on the coronal part of each tooth. Standard cavities (1.7 x 2 mm) were prepared. Cavities were acid etched, sealed with Scotch Bond 1 and filled by a hybrid composite. Cavities were exposed to one light source, thermocycled and immersed in a 2% methylene blue dye solution. Dye penetration in the leakage of cavities was recorded using a digital optical microscope. Mean values of percentage of dye penetrations in microleakages of cavities were 49.303 +/- 5.178% for cavities cured with LED, 44.486 +/- 6.075% with halogen bulb and 36.647 +/- 5.936% for those cured by argon laser. Statistically significant difference exists between cavities cured by halogen vs LED (P < 0.01), halogen vs laser (P < 0.001) and LED vs laser (P < 0.001). The lowest microleakage was observed in the cavities and composites cured with argon ion laser.
Tielemans
M
M
Department of Dental Sciences, Faculty of Medicine, University of Liege, Liege, Belgium. tielaser@hotmail.com
Compere
Ph
P
Geerts
S O
SO
Lamy
M
M
Limme
M
M
De Moor
R J G
RJ
Delmé
K I M
KI
Bertrand
M F
MF
Rompen
E
E
Nammour
S
S
D003188:Composite Resins / Q000528:radiation effects*; D055117:Curing Lights, Dental; D006801:Humans; D066298:In Vitro Techniques; D054020:Lasers, Gas
D003188:Composite Resins