Radiation curable compositions and composite articles made using additive manufacturing processes

摘要

A radiation curable composition comprising at least one radiation hardenable component, a photoinitiator, and a filler material having a population of particulates in an amount of at least 50% by weight of the printable composition. The particle population exhibits a median diameter (D50) of 0.3 micrometers or more on a volume-average basis as determined using the particle size test method, and the radiation curable composition has a viscosity of 150 Pa · s or less as measured using the viscosity test method. Shows. By selectively exposing a portion of the radiation curable composition to a source of actinic radiation to at least partially cure the exposed portion of the radiation curable composition to form a hardened layer, preferably in a additive manufacturing process such as stereophotolithography. Methods, methods, and systems for creating composite articles by are also described. The composite article can include a composite dental restoration.