FULL CERAMIC VENEER CROWN
PREPARED BY:
DR. PARSHAD DHADUK
DR. KHUSHBU GANDHI
YEAR:2014-15
All ceramic crowns
These are a type of cosmetic crown which
are made purely from ceramic and no other material. This is in contrast
to other types of crowns such as the porcelain fused to metal variety
and gold crowns.
The defining feature of these crowns is that they
are made from a translucent material which is attractive to look at and
blends in well with the rest of your teeth.
This means a top
quality crown which will last for many years. The majority of all
ceramic crowns are produced using computer technology, e.g. CAD/CAM
technology which is based upon 3D design.
Another option is metal ceramic crowns.
There are two types of ceramic crown:
Advantages of all ceramic crowns
These
crowns are ideally suited to people who have minimal space within their
mouth for a crown or prefer something which has a natural appearance.
They
are made from a thinner material which results in a lighter crown. Plus
the material used is ‘bio-compatible’ which is kind to natural gum
tissue and enables it to grow back alongside the crown.
There is no risk of an allergic reaction or sensitivity to hot or cold foods.
Disadvantages of all ceramic crowns
Whilst there are advantages of these crowns it is only fair to highlight the disadvantages as well.
There
appears to be a trade off between aesthetics and strength: this type of
crown is lifelike and pleasant to look at but there is a downside. It
is less durable than other types of crowns which mean it is more prone
to cracking or breaking.
Plus the refinement needed to produce
these crowns makes them more difficult to fit. They require a high
degree of expertise on the part of the dentist which increases their
cost.
How are all-ceramic crowns fitted?
The procedure is
the same as for any fitting of a crown. The dentist will clean and
reshape the tooth to be treated as a form of preparation. The tooth is
tapered so that it will allow the crown to fit snugly over the top.
An
impression is then taken of your teeth with dental putty. This mould is
sent to a dental laboratory where it will be used to fabricate a new
crown.
It takes around 2 to 3 weeks for this to happen so you will be fitted with a temporary crown in the meantime.
Once
it is ready you will asked to return to the surgery where you will be
fitted with your new crown. This involves the dentist roughing the
surface of the affected tooth with etching acid which will enable the
crown to adhere to the tooth.
This will be checked by your
dentist. Once both of you are satisfied with the fitting then it will be
fixed firmly in place with dental cement.
Take care of your new
crown. There is research being undertaken into the longevity of all
ceramic crowns so take care not to put too much pressure upon it. Be
careful when eating hard/crunchy foods and avoid grinding your teethIt provides the best aesthetics.
As ceramic is brittle in nature, it is susceptible to fracture. It is mostly used as a replacement of missing anterior teeth especially incisors.
But newer reinforced ceramics are available which make the material suitable for posterior restorations.
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