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Composite Fillings
Until recently, dentists filled and sealed cavities exclusively using a
silver and mercury amalgam. Unfortunately, these fillings (or
restorations) often weaken teeth due to the large amount of the original
tooth that has to be removed. Modern dentistry has increasingly turned
to composite fillings as a strong, safe and more natural looking
alternative. Composite fillings utilize a soft white plastic substance
that includes a hardening agent.
Pros and Cons of Composite Fillings
The major advantage of these fillings is that they come in a range of
shades that closely match the color of an individual's tooth. Due to the
increased strength of modern composite material, they can now also be
used in the back teeth. Unfortunately, composite fillings are 1 1/2 to 2
times more expensive than traditional restorations. Dental insurance
typically covers the cost of composite fillings up to the price of the
silver/mercury fillings.
The Filling Procedures
During your initial visit to the dentist, he or she begins by
anesthetizing the tooth and removing any remaining decay. Once the tooth
has been prepared, the dentist places the composite into the tooth where
it binds to the original surface. The process is typically performed in
several layers wherein each layer is cured or hardened with the use of a
hardening light. Composite restorations (fillings) for the back teeth
are referred to as inlays. If the inlays need to be custom-made at an
off-site dental lab, two visits to the dentist may be required. Once the
dental office receives the custom inlays, the patient returns to the
dentist's office, where the inlays will be bonded into place.
After the Fillings Have Been Placed
Patients may have increased sensitivity in the tooth for several weeks
following the procedure. Unlike veneers, composite fillings are porous.
Over time, they may become stained from coffee, tea, tobacco, etc. Many
dentists place a clear covering over the filling to avoid any future
staining. Composite fillings typically last three to twelve years,
depending on the location of the restoration, an individual's occlusion
(or bite), and several other factors.
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