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A 43-year-old member asked:

Is the failure of composite filling usually due to under jaw pressure or from tooth decay?

5 doctor answers12 doctors weighed in
Dr. Sharon Perelman
Dentistry 29 years experience
Composite failure: Composites or tooth colored fillings are chemically bonded to the tooth, failure of the filing may be due to a breakdown of the bonding. There are many things that may cause this including additional tooth decay.
Dr. Maryam Chiani
Dentistry 29 years experience
Composite fillings: Fillings can fail due to fracture or recurrent decay. Periodic check up can keep everything under control.
Dr. Phillip Frist
Dentistry 46 years experience
Man made materials. : No man made material will last forever. All will break down by erosion and wear, begin to leak at the margin between the filling and the tooth and decay will begin or other situations. In your case my main thought is how long has the restoration been there ?If it has been 7-15 years, i would conclude that the restoration has probaly lasted its life expectancy.
Dr. John Thaler
Prosthodontics 41 years experience
Both: Can be an issue of overload or torqueing forces which exceed the bond and/or mechanical strength. Decay can also be a factor which provides loosening options for the filling. Often it is both.
Dr. Paul Grin
Pain Management 36 years experience
Composite failure : The failure in the first 3-5 years is a restoration issue (e.g. technique or bonding material selection) and after that time period from secondary decay.

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Last updated Sep 28, 2016

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