Preventive examination of a 4-year-old child revealed a deep carious cavity on the masticatory surface of the 54 tooth. The cavity has no intercommunication with the tooth cavity and is filled with dense dentine. Probing, percussion, thermal test of the 54 tooth provoke no pain. The decay/filled index is 1, hygiene index is 1,9. What filling material is the most suitable for permanent filling of the 54 tooth?