The metal in our teeth

I was at my dentist's earlier this week and we got talking about the metals used in dental crowns. He gave me a copy of a certificate for a "High Noble" alloy crown.  It contains 40.3% gold, 39.3% palladium, 9.2% silver, 9.3% indium, 1.8% gallium, and 0.1% rubidium.  These are fused with a porcelain   A pretty impressive collection of metals and a good part of the reason for the cost of dental visits.  [photo credit wikipedia]