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2011, vol. 15, br. 2, str. 70-75
Correlation between depth of cure and distance between curing light tip and resin surface
(naslov ne postoji na srpskom)
Aristotle University of Thessaloniki, Faculty of Dentistry, Department of Operative Dentistry, Thessaloniki, Greece
Ključne reči: composite resins; depth of cure; polymerization; light curing unit
(ne postoji na srpskom)
Aim: to examine the relation between depth of cure and irradiation distance with different restorative composites and light curing units (LCUs). Materials and Methods: 3 different composite resins (Simile, Filtek Ζ250, Filtek Supreme XT) and 3 light curing units (Elipar High Light, Elipar Visio and LEDemetron) were used. Depth of cure was tested according to ISO 4049. A stainless steel mould was used for the preparation of specimens (8mm long, 4mm in diameter). The mould was filled with 1 of the composites and irradiated for 40sec. The distance between the exit window of the lamps and the surface of the composite resin was 0, 2, 4, 8, 16 and 32 mm. After polymerization, the height of the cylinder of the cured material was measured with a digital micrometer (accuracy ± 0.l mm). The relation between the irradiation distance and the depth of cure was analyzed by linear regression (p<0.05). Results: Analyses of regression coefficient ranked the LCUs in order of decreasing effectiveness as follows: LEDemetron > Elipar High Light > Elipar Visio. All composite resins had, with all LCUs, the same reduction in the depth of cure with increased irradiation distance. Conclusions: The depth of cure of light-activated composites decreased in a moderate and linear manner with the distance between the exit window and the surface of the material.
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jezik rada: engleski
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objavljen u SCIndeksu: 27.09.2011.