Polymerization of composites using pulsed laser (CROSBI ID 186935)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Tarle, Zrinka ; Meniga, Andrej ; Ristić, Mira ; Šutalo, Jozo ; Pichler, Goran
engleski
Polymerization of composites using pulsed laser
The quality of visible-light-cured composites depends on the capability of the light source to properly polymerize the material within a specified exposure time. In this study, the degree of conversion of different composite materials (hybrid and microfilled) of light and dark shades was compared after illumination by a standard curing unit and pulsed laser (lambda=468) respectively. The degree of conversion was measured by Fourier transform infrared spectroscopy. Results obtained by the analysis of the pulsed laser-induced polymerization were significantly higher for all the materials and shades observed. All values of the degree of conversion were lower for dark shades of all types of composites, regardless of the photopolymerization technique used. Besides the surface, better polymerization was recorded also at depths of 1.0, 2.0 and 3.0 mm, respectively. These values varied from 59.7%+/-2.14 to 84.5%+/-0.33 for pulsed laser (including all depths) caused by the saturation effect induced by high power laser pulses and from 42.7%+/-1.48 to 74.7%+/-0.99 for standard polymerization.
acrylic acid resin ; biomedical and dental materials ; infrared spectroscopy ; laser
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Podaci o izdanju
103 (6)
1995.
394-398
objavljeno
0909-8836
1600-0722
10.1111/j.1600-0722.1995.tb01863.x