Conclusion
Although clinical long-term evaluations are a critical requirement
to conclude that zirconia has good reliability for dental
use, biological, mechanical, and clinical studies published to
date seem to indicate that ZrO2 restorations are both well
tolerated and sufficiently resistant. Ceramic bonding, luting
procedures, ageing and wear of zirconia abutment should be
evaluated in order to guide adequate use of zirconia as
prosthetic restorative material. Patient selection, coupled with
adequate clinical and technical protocols, are imperative in
order to obtain good performance of these restorations.