A 15-year-old girl complains of a carious cavity in her tooth and spontaneous pain that quickly passes. The child is somatically healthy. Objectively, in tooth 36 there is a carious cavity within the parapulpar dentin, the response to a cold stimulus is painful, the pain abates in 1 2 miuntes. Probing of the cavity floor is painful in one spot. Percussion is painless. Make the provisional diagnosis: