A 10-year-old child complains of persisting throbbing pain in tooth 36, which appeared one day ago. Hot stimulus aggravates the pain, while cold mitigates it slightly. Objectively on the masticatory and medial surfaces of tooth 36 there is a deep carious cavity non-communicating with the dental cavity. Probing of the cavity bottom and percussion are painful. X-ray shows no pathologic changes of the periodontium. What treatment method shold be chosen in this case?