A 21-year-old woman complains of short-term pain attacks in her lower left provoked by thermal stimuli and quickly stop after the stimulus removed. On the masticatory surface of tooth 47 examination reveals a carious-cavity with a narrow entrance that is filled with light-softened dentin. Probing of the cavity floor and percussion of tooth 47 are painless. Probing of the cavity walls is painful. What diagnosis can be made in this case?