Composite is best used in small cavities. When it is used to fill back teeth in place of the more common. silver amalgam fillings, it is less durable. When more than one-half of the tooth is missing, when some or. all of the biting edge of a front tooth is missing, or when one of the cusps (points) of a back tooth is. missing, a crown (cap) should be considered instead of composite. Crowns are stronger and will.
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