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Increases of intracanal and root surface temperatures during the obturation of canal using the E&Q master system and the system

Cumbo, Enzo Maria Giuseppe and Russo, R. and Milia, Egle Patrizia and Gallina, Giuseppe (2010) Increases of intracanal and root surface temperatures during the obturation of canal using the E&Q master system and the system. Dental Materials, Vol. 26 (Supplement 1), e68-e68. eISSN 1879-0097. Article.

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DOI: 10.1016/j.dental.2010.08.154

Abstract

Objectives: The purpose of our study is to assess the increases of intracanal and root surface temperatures during the obturation of canal system using the E&Q Master System and the System B.
Materials and methods: A split-tooth model was built. To measure the temperature, 6 grooves for the placement of thermocouples were made in the buccal half of the model. On the mesial side, three grooves were made at 2, 4 and 6 mm from the anatomical apex and were extended to the root surface, while on the distal side three grooves were made at 2, 4 and 6 mm up to the intracanal portion. In each of these grooves was inserted a type T thermocouple (Copper-Costantana) with a diameter of 0.076 mm. 40 canal obturations were done: 20 using the E&Q Master System and 20 using the System B, set at 250 °C, both with plugger FM increased to 3.5 mm from WL. The temperatures were recorded at 1 s intervals for a period of 200 s.
Results: During the continuous wave obturation technique two peaks in temperature occurred, the first caused by the plugger in the canal, the second during the separation phase. In the E&Q Master System the highest increases were recorded in the thermocouple N.6, which reported average increases of 6.30 °C, while the lowest were recorded in the thermocouple N.1, which reported a value of 2.11 °C. In the System B group the highest increases were recorded in the thermocouple N.6, which reported average increases of 2.80 °C, while the lowest were recorded in the thermocouple N.1, which reported a value of 0.4 °C.
Conclusions: Analysis of the obtained results showed that both systems allow us to get a good thermal mass increase of gutta-percha. Results show that the use of E&Q Master System and System B, in vitro, appears to cause a dangerous increase in temperature along the surface of the root that may create iatrogenic injury.

Item Type:Article
ID Code:5518
Status:Published
Refereed:Yes
Uncontrolled Keywords:E&Q master system, obturation
Subjects:Area 06 - Scienze mediche > MED/28 Malattie odontostomatologiche
Divisions:001 Università di Sassari > 03 Istituti > Clinica odontoiatrica
Publisher:Elsevier
eISSN:1879-0097
Additional Information:Abstracts of the Academy of Dental Materials Annual Meeting, 7-9 October 2010, Trieste, Italy.
Deposited On:11 Mar 2011 19:33

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