A filling or dental obturation is meant to fill up a tooth that would have been destroyed by caries, wear or fracture. Two materials are most often used: amalgam (silver or black filling) and composite (white filling). Similar in terms of sustainability, both types of fillings are distinguished primarily by the fact that the white filling is more aesthetic, requires a more conservative tooth preparation and does not contain mercury found in gray fillings. It is important to note that fillings (gray and white) have physical limits. When they become extensive they are much more fragile and increase the risk of fracture of the remaining tooth. At this point a crown is indicated to strengthen the tooth and reduce the risk of losing it by a non-restorable fracture.
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