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Thermal analysis of the dentine tubule under hot and cold stimuli using fluid–structure interaction simulation

Biomechanics and Modeling in Mechanobiology volume 17, pages 1599–1610 (2018)Cite this article

Abstract

The objective of this study is to compare the thermal stress changes in the tooth microstructures and the hydrodynamic changes of the dental fluid under hot and cold stimuli. The dimension of the microstructures of eleven cats’ teeth was measured by scanning electron microscopy, and the changes in thermal stress during cold and hot stimulation were calculated by 3D fluid–structure interaction modeling. Evaluation of results, following data validation, indicated that the maximum velocities in cold and hot stimuli were − 410.2 ± 17.6 and + 205.1 ± 8.7 µm/s, respectively. The corresponding data for maximum thermal stress were − 20.27 ± 0.79 and + 10.13 ± 0.24 cmHg, respectively. The thermal stress caused by cold stimulus could influence almost 2.9 times faster than that caused by hot stimulus, and the durability of the thermal stress caused by hot stimulus was 71% greater than that by cold stimulus under similar conditions. The maximum stress was on the tip of the odontoblast, while the stress in lateral walls of the odontoblast and terminal fibril was very weak. There is hence a higher possibility of pain transmission with activation of stress-sensitive ion channels at the tip of the odontoblast. The maximum thermal stress resulted from the cold stimulus is double that produced by the hot stimulus. There is a higher possibility of pain transmission in the lateral walls of the odontoblast and terminal fibril by releasing mediators during the cold stimulation than the hot stimulation. These two reasons can be associated with a greater pain sensation due to intake of cold liquids.

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  1. Department of Biomedical Engineering, Islamic Azad University-North Tehran Branch, P.O.B. 1651153311, Tehran, Iran

    Seifollah Gholampour & Amin Jalali

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  1. Seifollah Gholampour
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  2. Amin Jalali
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Correspondence to Seifollah Gholampour.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of Shohada Tajrish Hospital research committee North Tehran Branch, Islamic Azad University, Tehran, Iran (Ethics committee of biomedical research center) and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

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Gholampour, S., Jalali, A. Thermal analysis of the dentine tubule under hot and cold stimuli using fluid–structure interaction simulation. Biomech Model Mechanobiol 17, 1599–1610 (2018). https://doi.org/10.1007/s10237-018-1046-3

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  • DOI: https://doi.org/10.1007/s10237-018-1046-3

Keywords

  • Hydrodynamic theory
  • Odontoblastic transduction theory
  • Intensity of thermal stress
  • Fluid–structure interaction
  • Scanning electron microscopy