PubMed · 8357670
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I A Ball. 1993-08-07. Non-setting pastes.. https://doi.org/10.1038/sj.bdj.4808241
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This report presents a case of a completely intrusive luxation of a mature permanent central incisor in a 10-yr-old boy. The intruded tooth was repositioned by using surgical extrusion and stabilization with interdental sutures. Endodontic treatment was performed with calcium hydroxide paste as the intracanal medication and a calcium hydroxide-based root canal sealer. This treatment mode was observed at 18 months and was successful at that time.
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This in vitro study investigated the effect of long-term storage on the coronal leakage of a microbial marker on teeth root filled with lateral condensation of cold gutta-percha and one of two sealers. Sixty single-rooted teeth were prepared chemomechanically to a size 40 master apical file. The teeth were divided into two groups of 20 teeth each and obturated with gutta-percha using either Apexit or Tubliseal EWT sealer. The teeth were stored for 6 months in artificial saliva and tested for leakage using a marker consisting of S. sanguis and P. intermedia. The teeth were checked for bacterial leakage daily for 90 days. All positive control teeth leaked after 24 h, while the negative control teeth remained uncontaminated throughout the test period. Leakage reached the apex through the experimental teeth at the earliest at 17 days and at latest at 88 days. Fifty percent and 70% of the specimens of the Apexit and Tubliseal EWT groups respectively showed leakage at 90 days. There was no statistically significant difference (p > 0.05) between the two groups.