Warm vertical compaction sequences in relation to gutta-percha temperature

Journal of Endodontics
J Y BlumP Machtou

Abstract

The aim of this study was to analyze warm vertical compaction sequences in relation to the temperature variations of gutta-percha. Twenty-four maxillary incisors were obturated according to two different instrumentation techniques: Compaction and heating were performed with either the monomanual classical or bimanual method. To evaluate gutta-percha temperature, thermocouples (TC) were introduced into channels bored through the dentin into the root canal system or fixed on the root surface at 8 (TC8), 4 (TC4), 2 (TC2), and 0 mm (TC0) from the apex. Maximal temperature was 118 degrees C for TC8, 52 degrees C for TC4, and 44 degrees C for TC2 and TC0. At TC0, the temperature remained above 42.9 degrees C for 10 +/- 5 s. These results show the importance of heating down to a distance of 7 mm to ensure a significant increase in apical gutta-percha temperature. They further indicate that the last compaction should last more than 15 s to avoid detrimental cooling and dimensional variations. The principal differences between the monomanual and bimanual methods were the compaction time (5.07 +/- 0.2 min vs 4.02 +/- 0.3 min) and the number of compactions (8 +/- 1 vs 12 +/- 2).

References

Feb 1, 1981·Journal of Endodontics·D A AllisonR E Walton

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Citations

Nov 1, 2012·Journal of Conservative Dentistry : JCD·Enzo CumboGiuseppe Gallina
Jul 20, 2014·Journal of the Formosan Medical Association = Taiwan Yi Zhi·Ya-An ChengChun-Pin Lin
Feb 1, 1997·Journal of Endodontics·J Y BlumJ P Micallef
Mar 18, 2005·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Mariusz Lipski
Oct 21, 1998·The Veterinary Clinics of North America. Small Animal Practice·J M Anthony
Aug 20, 2014·Journal of Endodontics·Benjamín Briseño MarroquínBrita Willershausen
Nov 27, 2002·International Endodontic Journal·M VenturiL Breschi
Nov 7, 1999·International Endodontic Journal·G K SilverD G Purton
Jun 2, 2009·Journal of Endodontics·Arnaldo Sant'Anna-JúniorJuliane Maria Guerreiro-Tanomaru
Dec 20, 2002·Journal of Endodontics·Theodore NeffBillie Gail Jeansonne
Mar 1, 2018·Restorative Dentistry & Endodontics·Hoon-Sang ChangJin-Woo Kim
Feb 12, 2017·Clinical Oral Investigations·H W RobertsB E Bergeron
May 29, 2004·Journal of Endodontics·Mauro Venturi, Lorenzo Breschi

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