Güçlü, Zeynep Asli, Dönmez, Nazmiye, Tuzuner, Tamer, Odabaş, Mesut, Hurt, Andrew P. and Coleman, Nichola (2016) The impact of Er:YAG laser enamel conditioning on the microleakage of a new hydrophilic sealant — UltraSeal XT® hydro™. Lasers in Medical Science, 31 (4). pp. 705-711. ISSN 0268-8921 (Print), 1435-604X (Online) (doi:https://doi.org/10.1007/s10103-016-1878-y)

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Abstract

UltraSeal XT® hydro™ is a new hydrophilic, light-cured, methacrylate-based pit and fissure sealant which has been developed by Ultradent Products, USA. The sealant is highly filled with a 53 wt.% mixture of inorganic particles which confer both thixotropy and radiopacity. The principal purpose of this study was to investigate the microleakage of UltraSeal XT® hydro™ as a function of different enamel etching techniques. The occlusal surfaces of sound, extracted human molars were either acid etched, Er:YAG laser irradiated or successively laser irradiated and acid etched. UltraSeal XT® hydro™ was applied to each group of teeth (n=10) which were subjected to a thermocycling process consisting of 2500 cycles between 5 and 50°C with a dwell time of 30s. Microleakage assessments were then carried out using 0.5 % fuchsin dye and optical microscopy. The microleakage score data were analysed using the Kruskal-Wallis, Mann–Whitney U test with Bonferroni adjustment. No significant differences in microleakage were noted between the individually acid etched and laser-irradiated groups (p>0.05); however, teeth treated with a combination of laser irradiation and acid etching demonstrated significantly lower microleakage scores (p<0.001). Electron microscopy with energy-dispersive X-ray analysis revealed that the mineral filler component of UltraSeal XT® hydro™ essentially comprises micrometre-sized particles of inorganic silicon-, aluminium- and barium-bearing phases. Laser etching increases the roughness of the enamel surface which causes a concentrated zoning of the filler particles at the enamel-sealant interface.

Item Type:	Article
Additional Information:	© The Author(s) 2016. This article is published with open access at Springerlink.com
Uncontrolled Keywords:	Er:YAGlaser, Hydrophilic fissure sealant, Microleakage, Scanning electron microscopy
Subjects:	R Medicine > RK Dentistry
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > School of Science (SCI)
Last Modified:	20 May 2019 00:05
URI:	http://gala.gre.ac.uk/id/eprint/14805

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