The reasons for the application of zirconium or metal-supported porcelain may be tooth deficiency or due to the following reasons;
1. To close gaps between teeth
2. To cover cavities or fractures
3. To improve the appearance of discolored, stained or worn teeth
4. To remove common deformations
5. For reconstruction after root canal treatment
6. To restore chewing function lost for the replacement of teeth as prosthetics.
7. To correct the shape or size of teeth