The Influence of Different Light Curing Modes on the Depth of Cure of the Composite Resin - - - Uticaj različitih režima prosvetljavanja na dubinu polimerizacije kompozitnih smola
Journal Title: Acta Facultatis Medicae Naissensis - Year 2018, Vol 35, Issue 1
Abstract
The aim of this study was to investigate the influence of different light curing modes on the depth of cure of the composite resin. The metal block with formed round holes served as a mold for the placement of the composite resin. The composite resin was cured with Penguin DB-685 lamp with four optional working modes: strong, low, gradually strong, and flashing. Unpolymerized part of the composite specimen was removed by scraping with a plastic spatula, and then each specimen was placed into the capsule with 1 ml of ethanol alcohol and mixed for 20 s in amalgamator. The length of the remaining composite specimen was measured with the digital caliper with a precision of 0.01 mm. The measured values were divided by 2 (according to ISO 4049 standard) and then statistically processed. Based on the measured lengths of the polymerized part of the composite specimens, the lowest average value of the depth of cure (2.75 ± 0.08 mm) was determined after polymerization with the low mode and the highest value was obtained (2.98 ± 0.08 mm) with strong polymerization mode. Statistically significant difference (p < 0.05) was determined between low polymerization mode and all other modes (strong, gradually strong and flashing mode). The observed statistically significant differences are not clinically important because all curing modes provided the necessary depth of cure, which is in accordance with the clinical recommendation of 2 mm thick composite layer. - - - Cilj rada bio je da se ispita uticaj različitih režima prosvetljavanja na dubinu polimerizacije kompozitnih smola. Metalni blok sa formiranim kružnim otvorima je služio kao kalup za postavljanje kompozita. Kompozit je prosvetljavan Pengin DB-685 lampom sa četiri polimerizaciona režima: strong, low, gradually strong and flashing režim. Nepolimerizovani deo kompozita je uklanjan struganjem plastičnom špatulom, a zatim je preostali deo kompozita postavljan u kapsule sa 1 ml etanol alkohola i miksiran 20 s u amalgamatoru. Dužina preostalog kompozitnog uzorka je merena digitalnim nonijusom sa preciznošću od 0,01 mm. Izmerene vrednosti su podeljene sa 2 (prema ISO 4049 standardu), a zatim statistički obrađene. Na osnovu izmerenih dužina polimerizovanih delova kompozitnih uzoraka, najmanja prosečna vrednost dubine polimerizacije je određena nakon prosvetljavanja low režimom (2,75 ± 0,08 mm), a naveća strong režimom (2,98 ± 0,08 mm). Statistički značajna razlika (p < 0,05) je određena između low režima i ostalih režima prosvetlja-vanja (strong, gradually strong and flashing režima). Uočene statistički značajne razlike nemaju veći značaj u kliničkoj praksi zato što su svi režimi prosvetljavanja obezbedili potrebnu dubinu polimerizacije, što je u saglasnosti sa kliničkom preporukom od 2 mm debljine kompozitnog sloja.
Authors and Affiliations
Nikola Miljković, Stefan Dačić, Tamara Karuntanović, Marko Igić, Milica Dačić, Dragica Dačić-Simonović
Keywords
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- EP ID EP349214
- DOI 10.2478/afmnai-2018-0006
- Views 101
- Downloads 0
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