1. Dental crowns have been around in dentistry for quite a long time and their utility
in kids and adults has been unquestionable in dentistry. A dental crown is a
dental restoration that cups over that portion of the tooth that lies above the gum
line. The crowns are generally used to protect teeth and strengthen them.
Dental crown are inserted into your oral cavity are going to protect your weak
tooth that has been made weak either due to a mechanical reason or due to the
infestation of infection caused by microbes and plaque. Research has shown
that dental crowns are quite effective in strengthening teeth that have been
cracked as crowns hold them together. People who have worn out tooth will find
crowns as most effective as dental crowns build up the worn down teeth
appearance. The dental crown will even fit if very less traces of the tooth have
been left in the oral cavity. If you are going in for dental bridges or dental
implants then dental crowns are most effective in covering them.
Sometimes people need to hide their smile and teeth because they have badly
shaped or discolored teeth. In many cases the discoloration maybe permanent
that cannot be removed with the aid of teeth whitening techniques then dental
crowns are quite effective. Dental crowns are extensively used to cover up these
discolored or misaligned teeth.

2. Dental crowns are made up of different material and you can go in for any
material depending upon the availability of the material and the advice of your
dentist. You can also use your personal preference and budget to decide which
kind of dental crown you are going to have for your teeth.
All-ceramic or porcelain crowns form the most favorite material for dental crowns
due to its easy availability and cost effectiveness although they are not as
durable as metal dental crowns. They provide a natural look to the teeth and can
be blended with your already existing teeth. Apart from that they are the best
choice for people who are allergic to metallic dental crowns.
All resin dental crowns are also available although they are quite cheap but are
not preferred as they will wear down too fast and are also prone to fracture at a
small mechanical injury.
The best choice is the metal or porcelain fused metal dental crowns. Chromium
and nickel are the metals that are used for metallic dental crowns. Metal crowns
are generally used at the back of the jaw as their color will give a unique look to
the teeth. They are sturdy and provide the best chewing experience to a human
being who has them in his oral cavity.

3. Porcelain fused to metal can be used at the front of the teeth and color matching
can be done easily in this case. But porcelain being prone to breakage they
cannot match the sturdiness of the all metal dental crowns that are generally
employed at the back of the oral cavity. Apart form that they may even harm the
opposing teeth due to the metal content present in them.
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Artice Resource :- http://dentalclinicinindia.wordpress.com/2013/02/20/the-utility-
of-dental-crowns-in-dentistry/