Changes in root surface temperatures with in vitro use of the system B heatsource

John W. Floren, R. Norman Weller, David Henry Pashley, W. Frank Kimbrough

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The purpose of this study was to measure root surface temperatures while using the System B HeatSource at various temperature settings. A split-tooth model of a human maxillary central incisor was prepared with 10 thermocouples to record root surface temperatures at 1-mm increments from the root apex. A System B HeatSource model 1005 was used to warm and compact gutta-percha to within 3 mm of the working length using the Buchanan technique. Twenty obturations were recorded at each of the following temperature settings: 250°, 300°, 350°, 400°, 450°, 500°, 550°, and 600°C. Examination of the mean temperatures recorded for each position and at each temperature setting revealed that the thermocouple 5 mm from the apex (T5) detected the highest increases in root surface temperatures. Only this site exceeded the 10°C rise in temperature for one full minute that could cause damage to the supporting structures. The range of instantaneous temperatures at this site was 8.85 to 12.06°C, with a mean of 10.62 ± 0.93°C. The results of this in vitro study indicate that any temperature setting of the System B HeatSource at or above 250°C has the potential to cause the root surface temperature to rise 10°C. Whether this occurs in vivo or if it does is maintained long enough to cause any tissue damage remains to be determined.

Original languageEnglish (US)
Pages (from-to)593-595
Number of pages3
JournalJournal of Endodontics
Volume25
Issue number9
DOIs
StatePublished - Jan 1 1999

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Temperature
In Vitro Techniques
Gutta-Percha
Incisor
Tooth

ASJC Scopus subject areas

  • Dentistry(all)

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Changes in root surface temperatures with in vitro use of the system B heatsource. / Floren, John W.; Weller, R. Norman; Pashley, David Henry; Kimbrough, W. Frank.

In: Journal of Endodontics, Vol. 25, No. 9, 01.01.1999, p. 593-595.

Research output: Contribution to journalArticle

Floren, John W. ; Weller, R. Norman ; Pashley, David Henry ; Kimbrough, W. Frank. / Changes in root surface temperatures with in vitro use of the system B heatsource. In: Journal of Endodontics. 1999 ; Vol. 25, No. 9. pp. 593-595.
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