| dc.description.abstract | This study proposes an innovative three-dimensional printing technology with submersionlight apparatus. A zirconia powder with an average particle size of 0.5 µm is mixed with 1,6-
Hexanediol diacrylate (HDDA) and photo-initiator to form a slurry. The weight percentage of
zirconia powder to HDDA is 70:30 wt.%. A light engine box is submerged in a slurry and emits a
layered pattern to induce photopolymerization and transform a slurry into a printed green body.
Green body sintering parameters for the first and second stages are 380 ◦C with a holding time of
1.5 h and 1550 ◦C with a holding time of 2 h. The sintered parts’ length, width, and height shrinkage
ratios are 29.9%, 29.7%, and 30.6%. The ball milling decreases the powder particle size to 158 ± 16 nm
and the mean grain size of the sintered part is 423 ± 25 nm. The sintered part has an average hardness
of 1224 (HV), a density of 5.45 g/cm3
, and a flexural strength of 641.04 MPa. A three-unit zirconia
dental bridge also has been fabricated with a clinically acceptable marginal gap. | en_US |
