Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/63824
Type: Artigo de periódico
Title: Effect of composite temperature on in vitro intrapulpal temperature rise
Author: Daronch, M
Rueggeberg, FA
Hall, G
De Goes, MF
Abstract: Objectives. To measure in vitro intrapulpal temperature when placing and restoring with either room - temperature or pre-heated (54 and 60 degrees C) composite. Methods. A K-type thermocouple was placed in the pulpal chamber of an extracted, human bifurcated upper premolar which had a Class V preparation (I mm remaining dentin thickness) on the facial surface. Tooth roots were immersed in a thermostatically controlled water bath and perfused with water at 1.25 mu l/min to simulate physiological circulation in the pulp chamber. The thermocouple was connected to an analog-to- digital converter. The preparation was filled using composite either at room - temperature, or pre-heated to 54 or 60 degrees C with a commercial compule heater (Calset (TM)), using standard clinical procedures by one person while continuously monitoring intrapulpal temperature (n = 5). Temperature rise over baseline values were determined at various stages during the restoration process: composite placement, contouring, prior to light-curing, and immediately after light-curing (20 s, Optilux 501). At each measurement interval, intrapulpal temperature values were compared using ANOVA and the Tukey-Kramer post hoc test (alpha = 0.05). Results. Significant differences were found in intrapulpal temperature when comparing preheated and room-temperature composite treatments with respect to baseline among the stages of the restorative process. However, the extent of this increase with heated composite was only 0.8 degrees C. A 5 degrees C intrapulpal temperature rise was seen for all groups during photopolymerization. Significance. Use of pre-heated composite only mildly increased intrapulpal temperature values when compared to composite delivered at room- temperature in an in vitro test environment. The largest temperature change occurred with application of the curing light. (C) 2006 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
Subject: dental materials
resin composite
intrapulpal temperature rise
pre-heated composite
temperature
Country: Inglaterra
Editor: Elsevier Sci Ltd
Rights: fechado
Identifier DOI: 10.1016/j.dental.2006.11.024
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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