Original scientific paper
Degree of Conversion and Temperature Measurement of Composite Polymerised with Halogen and LED-Curing Unit
Alena Knežević
Zrinka Tarle
Andrej Meniga
Jozo Šutalo
Goran Pichler
Mira Ristić
Abstract
Today available composite materials are polymerized by blue light, with a wavelength of about 468 nm. Commercially available curing units for composite resin polymerization emit blue light of different intensity. Using curing units of higher light intensity to reach a higher degree of conversion unavoidably leads to higher temperature rise in material during hardening, and also to polymerization shrinkage of material. The aim of this study was to determine if there is any difference between the degree of conversion and temperature rise in three composite materials: Amelogen (Akeda Dental, Denmark), Pertac II (ESPE, Seefeld, Germany) and Z100 (3M Dental Products, St. Paul, Minessotta, USA) polymerized with exponential program of Elipar Trilight curing unit (ESPE, Seefeld, Germany) and Lux-o-Max curing unit (Akeda Dental, Denmark) based on LED (light emitting diodes) technology. The results showed only a slightly lower degree of conversion, in the case of polymerization with Lux-o-Max curing unit. The temperature rise was significantly lower in the case of polymerization with Lux-o-Max curing unit for all tested composite materials.
Keywords
halogen curing units; blue diodes; composite resins; degree of conversion; temperature
Hrčak ID:
2565
URI
Publication date:
15.6.2003.
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