What is a crown?
A crown is an artificial restoration
that fits over the remaining part of a prepared tooth,
making it strong and giving it the shape of a natural
tooth. A crown is sometimes known as a ‘cap’.
Why would I need a crown?
Crowns are an ideal restoration for teeth that have
been broken, or have been weakened by decay or a very
large filling. A crown could be used for a number of
other reasons, for instance:
· you may have discoloured fillings and would like to improve the appearance
of the tooth
· you may have had a root filling which will need a crown to protect
· it may help hold a bridge or denture firmly in place.
What is a crown made of?
Crowns can be made
of a variety of different materials and new materials
are continually being introduced.
Porcelain bonded to precious metal: this is what most
crowns are made from. A precious metal base is made
and then porcelain is applied in layers over it.
Porcelain crowns: these crowns are made entirely out
of porcelain and are not as strong as bonded crowns,
but they can look very natural and are most often used
for front teeth.
How is a crown prepared?
will prepare the tooth to the ideal shape for the
crown. This will involve removing most of the outer
surface, and leaving a strong inner core. The amount
of the tooth removed will be the same as the thickness
of the crown.
Once the tooth is shaped, the dentist will take an
impression (mould) of the prepared tooth, one of the
opposite jaw and possibly another to mark the way you
The impressions will then be given to the dental technician,
along with an appropriate shade and other information
needed for the crown to be made.
Courtesy of the British
Dental Health Foundation – www.dentalhealth.org