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Abstract
The aim of this study was to compare in vitro the characteristics of different types of luting cements (zinc phosphate, glass-ionomer and resin based composite cement) using scanning electron microscopy (SEM) analysis and microleakage for the quality range of materials. Dental cements were mixed in accordance with the manufacturer's instructions and formed with posts in dental root canals of extracted teeth. The quality of cement was determined by SEM observation on horizontal sectioned roots with fixed posts according to specific pore and marginal gap diameter. The microleakage was measured on specimens immersed in Lofler (methylene blue) solution. The mean values of the maximal diameter of pores, marginal gaps and microleakage of conventional cements are remarkably larger in comparison with composite luting agents. In conclusion, the quality and efficiency of composite luting agents in comparison with conventional cements are more successful in protecting the interior of tooth from penetration of oral fluids, bacteria and bacterial toxins into unprotected dentine.
Highlights
Pripremljeni uzorci su potopljeni u rastvor metilen plavog (Lofler-ov reagens, Alfapanon, Novi Sad, Srbija) u mračnoj komori, u trajanju od sedam dana
The quality and efficiency of composite luting agents in comparison with conventional cements are more successful in protecting the interior of tooth from penetration of oral fluids, bacteria and bacterial toxins into unprotected dentine
Summary
Cilj ovog rada je da se uporede karakteristike različitih dentalnih cemenata (cink-fosfat cement, glas-jonomer cement, kompozitni cement) koristeći skenirajuću elektronsko mikroskopsku analizu (SEM) i mikropropustljivost u proceni kvaliteta materijala. Na osnovu rezultata ove studije, kvalitet i efikasnost kompozitnih cemenata u poređenju sa konvencionalnim cementima je veći u zaštiti unutrašnjosti zuba od prodora oralnih tečnosti, bakterija i bakterijskih toksina do nezaštićenog dentina. Veličina kristala praha u zamešanom cementu uglavnom ima dimenzije koje su izražene u mikrometrima, dok se kod nekih vrsta cemenata kao što je kompozitni cement mere nanometrima. Najčešća vrsta cementa korišćena u kliničkoj praksi su cink-fosfat, glas-jonomer i kompozitni cement. Dugotrajnost cementa se ogleda u zaštiti unutrašnjosti zuba od prodora oralnih tečnosti, bakterija i bakterijskih toksina do nezaštićenog dentina. Cilj ovog istraživanja je da se uporede karakteristike različitih dentalnih cemenata in vitro koristeći SEM analizu i mikropropustljivost
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