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Related Experiment Videos

Intrapulpal temperature increases with temporary crown and bridge materials.

Sean Whalen1, Murray Bouschlicher

  • 1University of Iowa, Iowa City, USA.

General Dentistry
|April 2, 2004
PubMed
Summary
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The exothermic setting of temporary dental materials can significantly increase tooth pulp temperature. This study compared six materials to identify those causing the least heat buildup during crown fabrication.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • The exothermic setting reaction of provisional composites and acrylics used for temporary crowns and bridges can lead to significant intraoral heat generation.
  • Intrapulpal temperature increases, even as low as 5.5°C, can cause immediate and prolonged pulpal responses, potentially compromising dental pulp vitality.
  • Understanding the thermal behavior of these materials is crucial for preventing iatrogenic pulpal injury during dental procedures.

Purpose of the Study:

  • To compare the maximum intrapulpal temperature increase resulting from the exothermic setting reaction of six different temporary crown and bridge materials.
  • To provide data that can guide clinicians in selecting materials that minimize thermal stress on the dental pulp.

Main Methods:

Related Experiment Videos

  • Six temporary crown and bridge materials were evaluated for their exothermic heat generation during setting.
  • Prepared mandibular molar roots were suspended in a water bath, with the pulp chamber perfused by a water system simulating physiological blood flow (37.0°C, 40-50 mL/100 g/min).
  • Maximum intrapulpal temperature increases were measured and statistically analyzed using a one-way ANOVA and Tukey HSD post hoc test (alpha = 0.05).

Main Results:

  • Significant differences in maximum intrapulpal temperature increases were observed among the six tested temporary crown and bridge materials.
  • The study identified specific materials that generated higher or lower peak temperatures during their exothermic setting reaction.
  • Statistical analysis confirmed the significance of these temperature variations across the material groups.

Conclusions:

  • The choice of temporary crown and bridge material significantly influences the degree of intrapulpal temperature rise during fabrication.
  • Clinicians should be aware of the thermal properties of provisional materials to mitigate potential pulpal damage.
  • Further research could explore long-term clinical implications and optimal material selection strategies based on thermal profiles.