Examination of a 6-year-old child revealed a deep carious cavity in the 85 tooth. Percussion and probing are painless. Removal of softened dentin resulted in intercommunication with tooth cavity. Deep probing is painful. X-ray picture of the 85 tooth shows a focus of bony tissue destruction in the area of bifurcation, cortical plate of the 35 tooth has no pathological changes. What paste should be applied for the root filling in this case?