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Summary. In this study, a comparison of the sealing properties of two calcium hydroxide based endodontic sealers, Sealapex and CRCS with those of the root canal cement Tubli‐Seal was performed. The results showed that all materials failed to produce an effective apical seal and that the degree of leakage increased with time. The differences observed among the 1‐, 3‐ and 10‐day observation periods were statistically significant for all materials (P<0.001) whereas no significant differences between materials were observed at each observation period (P<0.05).
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Osvaldo Zmener (1987) studied this question.
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