Effect of composite temperature on in vitro intrapulpal temperature rise
| Autor: | Mario F. De Goes, George Hall, Frederick A. Rueggeberg, Marcia Daronch |
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| Rok vydání: | 2007 |
| Předmět: |
Baseline values
Analysis of Variance Hot Temperature Materials science medicine.medical_treatment Polyurethanes Composite number Acrylic Resins Composite Resins Tooth root medicine.anatomical_structure Mechanics of Materials Thermocouple Dentin medicine Humans General Materials Science Composite material Dental Restoration Permanent General Dentistry Dental restoration Dental Pulp Curing (chemistry) |
| Zdroj: | Dental Materials. 23:1283-1288 |
| ISSN: | 0109-5641 |
| DOI: | 10.1016/j.dental.2006.11.024 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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