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Quantitative analysis of endodontic microleakage of 5 different sealers in vitro

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Author:
No author available
Journal Title:
Chinese Journal of Stomatology
Issue:
z1
DOI:
10.3760/cma.j.issn.1002-0098.2012.s1.043
Key Word:
根管充填材料;微渗漏;液压装置;Root canal filling materials;Microleakage;Fluid transport model

Abstract: Objective To establish a fluid transport model for quantitative analysis of endodontic microleakage and to analyze endodontic microleakage of 5 different sealers.Methods Convective transport of water from the coronal to the apical end of obturated root canals was determined by the movement of an air bubble in a capillary glass tube connected to the apex of the experimental root section under a headspace pressure of 2 × 105 MPa.Water transport through existing voids in the canals could be measured reproducibly in this way.One hundred extracted single-root premolars,after root canal preparation,were divided into 5 groups with 20 teeth in each group.Obturation were madc using cold gutta percha lateral condensation technique.Five different sealers,which were ZOE,Sealapex,AH Plus,Sealite and Cortisomol,were used separately.The microleakage along roots obturated was determined in 48 hours and 3 months by the modified fluid transport model and compared using.Results Tbe model is nondestructive and can be used as sequential quantitative assessment of endodontic microleakage.After 48 hours of obturation,microleakage of group Sealapex [(5.8 ± 1.1) μl/3 h] was significantly more than those of AH Plus and ZOE sealer.However,after 3 months,leakage of group Sealapex decreased significantly [(2.5 ± 0.5) μl/3 h].At both 48 hours [(0.8 ± 0.2) μl/3 h] and 3 months [(1.4 ± 0.6) μl/3 h] test points,group AH Plus produced the smallest fluid transport which indicated satisfactory sealing ability (P < 0.05).Conclutions AH Plus sealer appeared to be dimensionally stable in vitro.

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