Effect of composite temperature on in vitro intrapulpal temperature rise

Márcia Daronch, Frederick Rueggeberg, George Hall, Mario F. De Goes

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Objectives: To measure in vitro intrapulpal temperature when placing and restoring with either room-temperature or pre-heated (54 and 60 °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 (1 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 μl/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 °C with a commercial compule heater (Calset™), 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 (α = 0.05). Results: Significant differences were found in intrapulpal temperature when comparing pre-heated 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 °C. A 5 °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.

Original languageEnglish (US)
Pages (from-to)1283-1288
Number of pages6
JournalDental Materials
Volume23
Issue number10
DOIs
StatePublished - Oct 1 2007

Fingerprint

Temperature
Composite materials
Curing
Thermocouples
Light
In Vitro Techniques
Tooth Root
Photopolymerization
Water
Dental Pulp Cavity
Bicuspid
Dentin
Digital to analog conversion
Analysis of variance (ANOVA)
Baths
Restoration
Pulp
Analysis of Variance
Monitoring

Keywords

  • Dental materials
  • Intrapulpal temperature rise
  • Pre-heated composite
  • Resin composite
  • Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

Cite this

Effect of composite temperature on in vitro intrapulpal temperature rise. / Daronch, Márcia; Rueggeberg, Frederick; Hall, George; De Goes, Mario F.

In: Dental Materials, Vol. 23, No. 10, 01.10.2007, p. 1283-1288.

Research output: Contribution to journalArticle

Daronch, Márcia ; Rueggeberg, Frederick ; Hall, George ; De Goes, Mario F. / Effect of composite temperature on in vitro intrapulpal temperature rise. In: Dental Materials. 2007 ; Vol. 23, No. 10. pp. 1283-1288.
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