A dental crown or cap is a routine dental treatment that protects teeth that may be weakened from a large filling or root canal. The goal of a crown is to protect a tooth from a fracture. Often times a tooth with a very large filling is one step away from turning into a dental emergency. New materials that dental crowns are made of (such as E-max or Zirconia) are white, tooth color materials that are very natural in appearance and restore the enamel of the tooth. New materials do not result in a black line around your crown. The crown procedure is predictable and efficient and can add longevity to a tooth that is susceptible to irreparable damage.