Are people receiving spontaneous gold dental prostheses without dentist intervention?

Question

Claims of unexpected and spontaneous fillings or full restorations of teeth with gold are not unheard of in many faith healing services and other religious gatherings. For example, in a video recorded at the Demonstrate Conference (an event hosted by Jennifer Eivaz), a woman testifies (*):

[...] I was, you know, asking God ... Holy Spirit to come ... and the miracle started happening ... and then I got a gold tooth! And it's so crazy, because you open your mouth, and everyone has their cameras looking at your mouth ... so I can't wait to brush my teeth and look at my gold tooth.

Similarly, in this thread a woman shares (*):

[...] I attended a healing/revival meeting tonight, put on by Jeff Jansen, of Global Fire Ministries, and the Lord gave many people gold teeth!!! I had been praying and fasting all week for the Lord to show Himself big and make Himself soooo real to me !!! And guess what? I got one, too!!!!!!!!!!!!!!!!!!!!!!! [...]

Many people got gold teeth tonight and NO ONE can tell me that it wasn't real because I saw it with my own eyes....one lady first noticed that God turned 3 of hers gold on the top and I looked and saw them. A few minutes later, two of hers on the bottom had turned and I saw them. A few minutes later, 8 had turned gold and I saw them all--before and after!!!!

(*) Emphasis mine.

In fact, the phenomenon seems to be relatively widespread, as many more examples recorded in different places and countries can be found with a quick YouTube search: A, B, C, D, E, F, G, H, I, J, K, L, etc.

Of course, spontaneous gold dental prostheses is not something you would expect to happen naturally according to modern physics, but we never know if exceptions can show up that would force us to revisit our theories.

Is it true that in certain religious gathering people are spontaneously receiving gold dental prostheses without the assistance of a dentist?

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Note: as there is no known way to provide a mundane explanation for the phenomenon based on natural science (as @TCooper's answer correctly explains), this leaves us with only two options left: 1) the divine is true, or 2) claimants are lying (either intentionally as part of a hoax, or unintentionally due to very bad memory). Since option 1 cannot be proven scientifically, and option 2 cannot be assessed exhaustively for practical reasons, I think a fair compromise for an answer is to select a modest but representative sample, say, 3 to 5 video clips where claimants are shown excited about very notorious gold prosthodontics (to rule out bad memory as a possible explanation), and then proceed to debunk the ministries holding the events where the purported miracles took place.

Answer 1

There is no genuine proof that those golden/silver crowns were not put in by dentists. It is quite common in dentistry to restore a missing or carious tooth by a gold crown or a gold restoration. Also according to the article God and the Golden Teeth:

One pastor peeled back his lip to show reporters a glittering gold crown, which he claimed had miraculously appeared last March. In fact, however, a dentist had put in the crown a decade earlier. When confronted with his old dental records, the pastor rather sheepishly said, “I’d have to say I was absolutely wrong…

The whole thing is a fraud, of course. I say this, not because God is unable to turn silver into gold, but because he has no reason to. Surely God has better things to do than improve our dental work.

Answer 2

The only known way to produce gold (outside mining from the earth the deposits left by ancient stars) is through nuclear transmutation, or in the specific case of gold, the term "alchemy" may be used. Occurrences of "alchemy" are indeed possible via modern technology, so we can study the requirements to make gold from another material, as outlined in this Scientific American article.

They specifically mention:

“We could have used lead in the experiments, but we used bismuth because it has only one stable isotope,” Morrissey says. The element’s homogeneous nature means it is easier to separate gold from bismuth than it is to separate gold from lead, which has four stable isotopic identities.

I quote that because the closeness of bismuth (or lead or mercury) on the periodic table allow the experiment to use fewer resources to achieve this.

For an idea of how much gold may be produced this way:

In 1980, when the bismuth-to-gold experiment was carried out, running particle beams through the Bevalac cost about $5,000 an hour, “and we probably used about a day of beam time,” recalls Oregon State University nuclear chemist Walter Loveland, one of the researchers on the project. Glenn Seaborg, who shared the 1951 Nobel Prize in Chemistry for his work with heavy elements and who died in 1999, was the senior author on the resulting study. “It would cost more than one quadrillion dollars per ounce to produce gold by this experiment,"

While a full ounce of gold isn't required for a crown or filling, you get the idea.

With this in mind the human's head, whose teeth are turned to gold, would need to be exposed to extreme particle conditions for a substantial period of time. We also can't forget the make up of teeth it no where close to bismuth or another element near gold on the periodic table. Even silver or ceramics are a far (but silver is at least a "reasonable") distance.

The point being to transmute a tooth or any material used in fillings other than gold, the required nuclear conditions are many orders of magnitude beyond the (already extreme) requirements to convert bismuth to gold.

"So they just need to be exposed to these extreme conditions, it doesn't prove it can't happen!" Please see here, they most likely wouldn't have a head left if anything close to the transmutations mentioned were to happen, and at the very least would instantly and continually be battling severe health problems the rest of their life.

In short, no this is not happening and is scientifically impossible to occur within a living human body.

EDIT:

I realize I've made a fundamental error in the above, and while I think majority of the research is worth maintaining for reference of the extreme conditions, the chemical composition of a tooth, or any fillers (silver, or ceramics) are all composed of elements that would require nuclear fusion to create gold. (which has yet to be achieved by any known source) So rather than a bombardment of particles an intense heat (not to mention pressure) would be required, which is so great it would more or less instantly melt through a human. Further, that's for fusion to begin, gold is only formed through fusion at the death of a star during it's supernova state

Finally, as they burnt silicon to make iron, they exploded as a supernova, and for a few short moments, each star would release as much energy as all the regular stars in that galaxy put together. In that cataclysmic explosion, for the first time, atoms of gold were manufactured — and then hurled out into the Universe, along with the other debris from that explosion.

So while I initially made a fundamental error in the direction of atomic change, the physical impossibility remains.