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Barbara Jones"Dr Knowles is the BEST dentist !
I travel 1 hr to go to him because he is that good. "
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Mon: 7:30am - 4:30pm Tues: 7:30am - 4:30pm Wed: 7:30am - 4:30pm Thurs: 7:30am - 4:30pm Fri: Closed Sat: Closed Sun: Closed
In my experience, large amalgam fillings are the most common reason why a tooth would need a crown since they expand and contract with hot and cold temperatures and many times introduce stress fractures into the tooth that then cause cusp fractures. With that being said, if a crown is indicated on this tooth and there is a gap between the amalgam and the tooth, I think it may be warranted to remove the amalgam first and clean up any recurrent decay around it. A composite buildup would most likely be necessary afterwards to replace missing tooth structure before the crown preparation. Sometimes it is possible to prepare through the amalgam, but most of the time I prefer to remove it to make sure the underlying tooth structure is in good shape without any recurrent decay which could cause trouble later. I have seen many crowns break off of the tooth at gum level because the previous amalgam restoration was very large and weakened the tooth. These crowns have small amounts of tooth structure inside them with large amalgam remnants.
