What is better for your teeth, in this case, is considered to be what is better for your crowns, because if it is a full denture or an implant denture, it is a different story. Generally crowns are commonly available in several of the cheapest metal crowns, namely nickel-chromium and cobalt-chromium crowns, which are correspondingly cheaper materials, but may carry some risk of pigmentation. On the next step up are the metal crowns often referred to as pure titanium or gold leaf, both types of crowns are much more metal compatible, but again the crowns contain a certain amount of metal. In the Internet said all-ceramic crowns, all-ceramic no metal, will not have any impact on imaging, but it will have the risk of chipping, here need to say a penny for every penny, relatively more expensive crowns the better.