Some disadvantages to CEREC crowns are that they are not as durable as metal or other combination crowns and don't always perfectly match natural teeth coloration, states mynewsmile.com. Although CEREC crowns can be completed in a single appointment, they also require a dentist to have special training.
Because CEREC crowns are made from a single piece of ceramic, they can chip or break, according to Northwest Smile Design. The ceramic material also lacks a color gradient, so CEREC crowns don't have the same color scale as natural teeth.
Mynewsmile.com explains that on a front tooth a CEREC crown is very noticeable. Even a highly skilled cosmetic dentist can have difficulty using CEREC technology to create a front tooth that looks natural. Dentists also need to be specially trained in the use of CEREC technology in order to provide this type of service. Ceramic crowns need to be properly bonded to the original tooth to have the strength to be functional. They require more preparation to attach, which causes a large amount of damage to the structure of the existing tooth. A ceramic that is too strong can also have a negative impact, causing wear and tear on opposing natural teeth. This can require more dental work down the line.