**3. Conclusions**

In conclusion, various dental restorative materials are available, and many appropriate materials are used to restore dental carious teeth. Among them, zirconia-based ceramics have been successfully introduced into the clinic due to acceptable biocompatibility, lower price compared with gold restorations and better appearance than traditional metal-ceramic restorations. In summary, zirconia restoration is an acceptable treatment option in restorative dentistry and a developing trend in esthetic dentistry.
