Another type of porcelain crown is Emax (Lithium Disilicate) crown, which they are also a ceramic-metal and extremely durable, however, they are not as opaque as Zirconia but translucent, so if the underlying color of the prepared tooth is dark, they will show the color through, however they are still amazingly strong and nice if the color of the underlying prepared tooth is natural dentin. Emax crowns can be cemented or bonded which is a benefit over Lava (Zirconia) crowns, and they tend to be more natural-looking as opposed to the bright white look of Lava or Zirconia crowns.
The benefits are ease in adjusting the Emax vs Zirconia to the patient’s bite, and an easier method to polish up the Emax crown vs Zirconia crowns. Their natural translucent color is beneficial over opaque Zirconia crowns, although nowadays with an expert Ceramist, translucent Zirconia crowns are available. They are for patients who more like to have a more natural white vs opaque white-bleached teeth smile. They are strong enough but not as strong as the monolithic Zirconia crowns, which are the hardest to fracture.