A screwing part 1220 is inserted into a large through-hole 1110 from its front side and is screwed together with a male screw part of a jig. The crown and bridge material is a light-curing and, in particular, flowable single-component material, and the carrier that can be adapted to the tooth situation is transparent or translucent. The multi-functional optical element includes a support structure and a monolithic imaging lens and target generating mechanism operably connected to the support structure. Through this manner, distortions of the photosensitive film pattern upon development are compensated and a target photosensitive film pattern can be more accurately acquired. The nozzle channel communicates with the mold cavity through a mold gate.