PubMed · 4511090
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E W Grimes. 1972. Warm what?. https://pubmed.ncbi.nlm.nih.gov/4511090/
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The purpose of this study was to determine the effect of increasing the temperature on the ability of rectified turpentine oil to dissolve gutta-percha. Rectified turpentine oil was warmed to 158 degrees F and then exposed to gutta-percha. This resulted in a significant increase (p < 0.01) in the ability of rectified turpentine oil to dissolve gutta-percha.
An updated version of the vertical warm gutta-percha obturation technique is presented. Recent research suggests that the physical properties of gutta-percha may be altered by using heat carriers that are too hot or by overheating gutta-percha in a flame. The technique proposes a simple method of thermoplasticizing and delivering gutta-percha without overheating it.
The relatively new technique of obturation using Thermafil endodontic obturators is claimed by the manufacturers to use gutta percha of a more linear structure than conventional gutta percha, and so provide a seal at least equal to laterally condensed material. In this article the authors describe the practical use of this widely marketed technique. Studies which have so far evaluated this technique are reviewed and its advantages and shortcomings discussed.