Existing fillings typically need to be changed due to put on, chipping, or cracking. Many people use this opportunity to exchange their silver amalgam fillings with natural, tooth-colored composites. Their causes may be aesthetic, or concern over the security of amalgam fillings, which include mercury. Composite fillings have a tendency to put on out sooner than silver fillings in bigger cavities, although they maintain up as nicely in small cavities.
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