All Porcelain Crowns and Veneers are the perfect permanent solution for strengthening and beautifying your smile.  Most cases are completed in only a few weeks.  There is no metal, so you will never see a dark line at the base of the crown.  They are used to replace large-worn fillings, beautify the smile, and close spaces.  Crowns are also used to add strength to teeth which have had root canals. (Dentistry by Dr. Anissa Holmes)