Transmembrane Potentials of Cultured Mouse Dentinal Pulp Cells.

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Abstract
Ultra microelectrode techniques were used to measure the membrane potentials (EM) of mouse odontoblasts grown in tissue culture. The odontoblast possesses the highest Em (-35 mv.) of any cell yet cultured from dentinal pulp. The possibility of the odontoblast serving as a sensory receptor for dentinal pain and/or its role in regulating the formation of dentin is discussed.