Examination of the oral cavity of a 12-year-old child revealed a carious cavity on the medial contact surface of tooth 46. The cavity is located within the mantle dentin, its walls and floor are pigmented and dense. Thermal stimuli provoke no response. Preparation of tooth 46 is painful in the area of dentinoenamel junction. The decay-missing-filled index is DMF + df = 2. What filling material will be optimal in this case?