MethemoglobinemiaAnesthetics, LocalToothacheAminobenzoatesBatrachotoxinsLidocainePulpitisChloraminesBenzocainePharmaceutical Vehiclespara-AminobenzoatesKv1.5 Potassium ChannelDental Pulp TestProcaineTosyl CompoundsParabensTetracaineDibucaineAnesthesia, LocalAdministration, TopicalAnesthesia, DentalGelsSodium ChannelsAnti-Infective Agents, LocalPain MeasurementBupivacaineSodiumPlacebosPotassium Channels, Voltage-GatedBinding SitesIon Channel GatingDouble-Blind MethodPotassium ChannelsPatch-Clamp TechniquesPotassiumTime FactorsKinetics