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<p>[QUOTE=&quot;CamaroDMD, post: 481096, member: 5233&quot;]It totally depends on what type of crown it is.&nbsp; If its a porcelain fused metal crown or a full metal crown and what tooth.</p><p><br /></p><p>Assuming it&#039;s a molar and a full metal crown.&nbsp; Generally, for a full metal crown you want a yellow metal for a couple reasons.&nbsp; First, yellow metals have a higher gold content and are thus more ductile.&nbsp; This makes it easier to adapt the crown to the margins on the tooth and make it smooth.&nbsp; As a result, it&#039;s easier to keep clean at the junction between the tooth and the crown and that helps reduce cavity formation.&nbsp; A fairly common alloy used for a full gold crown on a molar is Type IV gold.&nbsp; It is low enough in gold content to keep the price down a bit and is pretty strong, but has enough gold to remain ductile.&nbsp; I don&#039;t have the exact specs in front of me, but a type iv gold alloy is about 50% gold.</p><p><br /></p><p>As more strength is required, you see the gold content decrease.&nbsp; For example, bridge framework will be of a lower gold content.&nbsp; So will a crown that has a porcelain veneer on the front of it for aesthetics.[/QUOTE]</p><p><br /></p>

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