An 8-year-old boy complains about acute short-term pain in the 11 tooth caused by cold and sweet stimuli. Objectively: medial contact surface of the 11 tooth has a carious cavity within denti-noenamel junction filled with softened moist dentine that can be easily removed. Enamel edges are white, undermined, friable. Superficial probing is painless, thermal test is positive, percussion is negative. What is the filling material of choice?