Just a couple of points. In order to not add bias into all this, you need to list ANY other risk factors that you have besides this one which is not considered a proven risk factor by the American Academy of Oral Pathology.

If there is any meat in the "metal in the mouth" controversy it is NOT about restorations that are gold based. Gold is used as a control in animal implant studies since we know that it is benign in the body. It is the silver filings which contain various base metals, and most notably mercury. The issue with these has been debated for years, and it always comes down to volume of exposure. But even if mercury or other base metal contributes to ill health, is it likekly systemic and not local.

In some areas of the mouth all porcelain crowns versus porcelain fused to precious metal substructures are an inferior restoration as the do not have the inherent strength of something with a metal understructure. That metal understructure is predominantly gold with platinum and palladium and a small amount of rare earths added to it which form the oxides on the surface that the silicone oxides in dental ceramics bond to. The other precious metals raise the melting point of the alloy to one which will withstand the firing temperatures of the overlaying porcelain with out distorting during the process.

LP is a mystery in many respects. They do not know why people get it, and they have no way of treating it except for the symptomology and discomfort.