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Lookup NU author(s): Dr Robert Wassell
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The efficacy of low temperature (70°C) thermoplasticized gutta-percha used to seal root canals by the retrograde approach following apicectomy was assessed. A dye leakage technique was used, and gutta-percha was compared with amalgam. Two groups of different sized roots were apicected, and their root canals instrumented and filled conventionally with laterally condensed gutta-percha. Each group was randomly divided into four sub-groups; one was the control group in which no further treatment was carried out. In the other three groups the apical 3 mm of gurta—percha was removed, and the apical cavities filled as follows: group I with 70°C thermoplasticized gutta-percha with sealer; group II with 70°C thermoplasticized gutta-percha without seaier; group III with amalgam. The roots were rendered transparent by acid demineralization, and maximum dye penetration was measured. The results showed statistically significant ranking of leakage between the four sub-groups: 70°C thermoplasticized gutta-percha with sealer 70°C thermoplasticized gutta-percha without sealer amalgam control. The larger canals in all four sub-groups also exhibited significantly greater leakage than the smaller ones.
Author(s): Woo YR, Wassell RW, Foreman PC
Publication type: Article
Publication status: Published
Journal: International Endodontic Journal
Year: 1990
Volume: 23
Issue: 2
Pages: 107-112
Print publication date: 01/03/1990
ISSN (print): 0143-2885
ISSN (electronic): 1365-2591
Publisher: Wiley-Blackwell Publishing Ltd.
URL: http://dx.doi.org/10.1111/j.1365-2591.1990.tb00848.x
DOI: 10.1111/j.1365-2591.1990.tb00848.x
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