Author:
Simeone Michele,Santis Roberto De,Ametrano Gianluca,Prisco Davide,Borrelli Marino,Paduano Sergio,Riccitiello Francesco,Spagnuolo Gianrico
Abstract
Objectives:
To evaluate temperature profiles developing in the root during warm compaction of gutta-percha with the heat sources System B and System MB Obtura (Analityc Technology, Redmond, WA, USA). Thirty extracted human incisor teeth were used. Root canals were cleaned and shaped by means of Protaper rotary files (Dentsply-Maillefer, Belgium), and imaging was performed by micro-CT (Skyscan 1072, Aartselaar, Belgium).
Methods:
Teeth were instrumented with K-type thermocouples, and the roots were filled with thermoplastic gutta-percha. Vertical compaction was achieved through the heat sources System B and System MB, and temperature profiles were detect-ed by means of NI Dac Interface controlled by the LabView System. With both heat sources, higher temperature levels were recorded in the region of the root far from the apex. When the warm plugger tip was positioned at a distance of 3 mm from the root apex, temperature levels of about 180°C were used to soften gutta-percha, and no statistically significant differences were observed between peak temperatures developed by the two heating sources at the root apex. However, a temperature level higher than 40°C was maintained for a longer time with System MB.
Results:
Statistically significant differences were observed in peak temperature levels recorded far from the root apex. Thus, with a temperature of about 180°C and the warm plugger positioned at 3 mm from the root apex, both heating sources led to a temperature slightly higher than 40°C at the apex of the root, suggesting that the gutta-percha was properly softened.
Significance: A temperature level higher than 40°C was maintained for a longer time with System MB, thus providing an ad-equate time for warm compaction of the gutta-percha.
Publisher
Bentham Science Publishers Ltd.
Reference38 articles.
1. Zias J, Numeroff K.
Operative dentistry in the second century BCE.
J Am Dent Assoc
1987;
114
(5)
: 665-.
2. Torabinejad M, Watson TF, Pitt Ford TR.
Sealing ability of a mineral trioxide aggregate when used as a root end filling material.
J Endod
1993;
19
(12)
: 591-.
3. Aqrabawi J.
Sealing ability of amalgam, super EBA cement, and MTA when used as retrograde filling materials.
Br Dent J
2000;
188
(5)
: 266-8.
4. Gloria A, Causa F, Russo T , et al.
Three-dimensional poly (κ-caprolactone) bioactive scaffolds with controlled structural and surface properties.
Biomacromolecules
2012;
13
(11)
: 3510-21.
5. De Santis R, Catauro M, Di Silvio L , et al.
Effects of polymer amount and processing conditions on the in vitro behaviour of hybrid titanium dioxide/polycaprolactone composites.
Bi-omaterials
2007;
28
(18)
: 2801-9.
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