Temperature changes in the pulp chamber induced by polymerization of resin-based dental restoratives following simulated direct pulp capping.

Promene temperature u komori pulpe indukovane polimerizacijom dentalnih restaurativnih materijala na bazi smole nakon simuliranog direktnog prekrivanja pulpe. (Bosnian)

The objective of this study was to measure temperature changes in the pulp chamber induced by polymerization of resin-based dental restoratives following a simulated procedure of direct pulp capping. Class I cavities with a microperforation at the pulp horn were prepared in extracted human molar teeth. The complete procedure of direct pulp capping and cavity restoration was performed with the root part of extracted teeth fixed in a water bath at 37 °C. Mineral trioxide aggregate, bioactive dentin substitute or calciumhydroxide paste were used as pulp capping materials. Cavities were restored with a lightcured or chemically-cured resin-modified glass ionomer, universal adhesive and a bulk-fill composite, cured with a high-intensity LED unit. Pulp capping materials caused a slight temperature decrease. Lower temperature increase was recorded during light-curing of the glass ionomer liner after direct capping with mineral trioxide aggregate and calciumhydroxide than that recorded for the bioactive dentin substitute. Adhesive light-curing increased temperature in all groups with higher mean temperatures in groups with chemically-cured as compared to those for the light-cured glass ionomer liner. Direct pulp capping with mineral trioxide aggregate or calcium-hydroxide followed by the light-cured resin-modified glass ionomer liner and a bonded bulk-fill composite restoration induced temperature changes below the potentially adverse threshold of 42.5 °C. [ABSTRACT FROM AUTHOR]

Cilj ovog rada je bio da se izmere temperaturne promene u komori pulpe indukovane polimerizacijom dentalnih restaurativnih materijala na bazi smole nakon simulirane procedure direktnog prekrivanja pulpe. Kaviteti I klase sa mikroperforacijom u predelu roga pulpe preparisani su na ekstrahovanim humanim molarima. Kompletan postupak direktnog prekrivanja i restauracije kaviteta urađen je nakon fiksacije korenskog dela zuba u vodenom kupatilu na temperaturi od 37 °C. Mineralni trioksidni agregat, bioaktivni dentinski zamenik ili pasta na bazi Ca(OH)2 korišćeni su kao materijali za direktno prekrivanje pulpe. Kaviteti su restaurirani svetlosno-polimerizujućim ili hemijski-polimerizujućim smolom-modifikovanim glas jonomer cementom, univerzalnim adhezivom i "bulk-fill" kompozitom, polimerizovanim LED lampom velikog intenziteta. Materijali za direktno prekrivanje pulpe doveli su do minimalnog pada temperature. Manji porast temperature zabeležen je tokom svetlosne polimerizacije glas jonomer lajnera nakon direktnog prekrivanja mineralnim trioksidnim agregatom i Ca(OH)2 nego bioaktivnim dentinskim zamenikom. Polimerizacija adheziva uzrokovala je porast temperature u svim grupama i to sa većim srednjim vrednostima temperature u grupama sa hemijski- polimerizujućim glas jonomer lajnerom nego u grupama sa svetlosnopolimerizujućim glas jonomer lajnerom. Direktno prekrivanje pulpe mineralnim trioksidnim agregatom ili Ca(OH)2 praćeno svetlosnom polimerizacijom smolommodifikovanog glas jonomer lajnera i adhezivnom restauracijom "bulk-fill" kompozitom uzrokuje temperaturne promene ispod potencijalno štetnog praga od 42,5 °C. [ABSTRACT FROM AUTHOR]

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