Medical and dental 3D printing in Australia is governed by the TGA\'s personalized medical devices framework, not by the printing technology itself. Devices fall into three categories, patient matched, custom made, and adaptable, each with different obligations. A common misconception is that an ARTG listed resin automatically makes a finished device compliant, when the manufacturer still carries that responsibility. Biocompatibility depends heavily on proper post curing, not just certification on paper. This guide breaks down the regulatory basics, corrects common misunderstandings, and explains what labs, clinics, and manufacturers actually need to check before supplying a 3D printed medical or dental device.