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Review

Ion Channels Involved in Tooth Pain

by 1,†, 2,†, 1, 1,* and 2,3,*
1
Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 406-799, Korea
2
Department of Oral Physiology and Program in Neurobiology, School of Dentistry, Seoul National University, Seoul 08826, Korea
3
Dental Research Institute, Seoul National University, Seoul 03080, Korea
*
Authors to whom correspondence should be addressed.
These authors equally contributed to this work.
Int. J. Mol. Sci. 2019, 20(9), 2266; https://doi.org/10.3390/ijms20092266
Received: 31 March 2019 / Revised: 3 May 2019 / Accepted: 3 May 2019 / Published: 8 May 2019
(This article belongs to the Special Issue Ion Channels of Nociception)
The tooth has an unusual sensory system that converts external stimuli predominantly into pain, yet its sensory afferents in teeth demonstrate cytochemical properties of non-nociceptive neurons. This review summarizes the recent knowledge underlying this paradoxical nociception, with a focus on the ion channels involved in tooth pain. The expression of temperature-sensitive ion channels has been extensively investigated because thermal stimulation often evokes tooth pain. However, temperature-sensitive ion channels cannot explain the sudden intense tooth pain evoked by innocuous temperatures or light air puffs, leading to the hydrodynamic theory emphasizing the microfluidic movement within the dentinal tubules for detection by mechanosensitive ion channels. Several mechanosensitive ion channels expressed in dental sensory systems have been suggested as key players in the hydrodynamic theory, and TRPM7, which is abundant in the odontoblasts, and recently discovered PIEZO receptors are promising candidates. Several ligand-gated ion channels and voltage-gated ion channels expressed in dental primary afferent neurons have been discussed in relation to their potential contribution to tooth pain. In addition, in recent years, there has been growing interest in the potential sensory role of odontoblasts; thus, the expression of ion channels in odontoblasts and their potential relation to tooth pain is also reviewed. View Full-Text
Keywords: tooth pain; TRP channels; odontoblasts; piezo; purinergic; trigeminal ganglion tooth pain; TRP channels; odontoblasts; piezo; purinergic; trigeminal ganglion
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MDPI and ACS Style

Lee, K.; Lee, B.-M.; Park, C.-K.; Kim, Y.H.; Chung, G. Ion Channels Involved in Tooth Pain. Int. J. Mol. Sci. 2019, 20, 2266. https://doi.org/10.3390/ijms20092266

AMA Style

Lee K, Lee B-M, Park C-K, Kim YH, Chung G. Ion Channels Involved in Tooth Pain. International Journal of Molecular Sciences. 2019; 20(9):2266. https://doi.org/10.3390/ijms20092266

Chicago/Turabian Style

Lee, Kihwan, Byeong-Min Lee, Chul-Kyu Park, Yong Ho Kim, and Gehoon Chung. 2019. "Ion Channels Involved in Tooth Pain" International Journal of Molecular Sciences 20, no. 9: 2266. https://doi.org/10.3390/ijms20092266

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