Dentinal fluids, also known as dentin fluid or dentinal tubule fluid, are essential components within our teeth that play a crucial role in tooth sensitivity and mineral exchange. These fluids reside within microscopic channels called dentinal tubules, which connect the inner dental pulp to the outer surface of the tooth. When exposed to external stimuli, such as temperature or pressure changes, dentinal fluids transmit sensations to the dental nerves, resulting in tooth sensitivity. Synonyms for dentinal fluids include dentinal tubule fluid and dentin fluid, all denoting the vital fluids present within these minuscule channels that are responsible for tooth sensitivity and the exchange of minerals within our teeth.