Esthetic appearance and biocompatability are the most important reasons for preferring ceramic crowns in esthetic dentistry. For this reason, E-Max and zirconia are commonly used today.
Usually E-Max crowns are applied to ensure a natural and esthetic appearance in esthetic applications in the anterior, due to the fact that opacity of E-Max crowns are more than those of zirconia crowns.
However, zirconia crowns are more durable against masticatory force and use commonly in posterior esthetic restorations.
Clenching of teeth, bruxism, smoking etc. are other factors affecting the treatment plan and the material to be used.
Many porcelain materials are currently used beside E-Max and zirkonia, with the development of computerized 3-D design and production technology (CAD-CAM) in dentistry.
Selection of materials proper to the case is very important in esthetic dentistry to achieve a successful result and a perfect smile.