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  Porcelain crown fused to metal 
In case of metal allergy the ceramics can be burnt on a dental gold frame. It’s recommended only for those really have metal allergy, as even a bridge of 3-5 partials can be very heavy because of the weight of the gold alloy. In particular, the upper (or long) bridge can make chewing much harder because of its weight and it’s tiring for the masseter muscle. Thus golden frame is used only if there’s no possibility to use zirconium, which is more bio-compatible anyway than gold and nicer teeth can be made by using it. The cast golden bridges are only offered as a choice since their aesthetics is outdated, zirconium based frames are looking nicer and they are better quality. Since use of zirconium started in the dental industry, it overshadowed the other metal-framed dentures, as it can fully replace them and it also looks much nicer and no allergy develops to it.
Obviously, you can choose the golden frame, which is still a good enough solution. It’s aesthetic, bacteria-repellent, well cleanable and maintainable piece. It’s a long-term solution, in case of metal allergy this is the second best solution after the zirconium based frames. However it’s heavy, the masseter muscle needs to get used to it, the adaptation could take weeks, and it might be a weird feeling wearing it. It can be made only to shoulder-prepared stumps.
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