Yttria-tetragonal zirconia polycrystal ceramics (Y-TZP)
have attracted considerable interest for use in dental implants due to their
high strength and toughness, chemical stability, biocompatibility, and good
wear resistance. Zirconia produced at different temperatures can result incrystallography forms in monoclinic, tetragonal, and cubic phases. The optimal
mechanical properties of these three forms are achieved using zirconia in its
tetragonal form, which can be obtained by adding a stabilizer, such as MgO, CaO
or Y2O3. Furthermore, tetragonal stabilized zirconia with the addition of 3
mol% Y2O3 (3Y-TZP) exhibits excellent mechanical properties, and has been
wildly applied. In this study, 3 mol% yttria-stabilized zirconia powder was
used to produce dental implants.
Zirconia powder is used to produce dental
implants through two main processes: injection molding and sintering. Shrinkage
during both processes can affect the dimensions of the final implant, raisingchallenges for mold design. This study seeks to identify optimal parameters to
minimize shrinkage rates during injection molding and to ensure sufficient
implant density and hardness during sintering. The shrinkage rates obtained
from the sintering process are calculated to improve future mold designs.
No comments:
Post a Comment