DENTAL work falls out for 1 reason, it is designed to "swell" and crack your tooth and eventially be crowned, then root canal and then pulled..........the dental profession is a profession of evil murders that promote their evil deeds starting with 3 year olds and often sickly 5 year olds have a mouth full of metal that the dentist were trained to use to make future cancer patients for their medical brotherhood.
YOUR CRACKED TOOTH is permantly dentist damaged, your dental metals are in that tooth, your gums and your entire body. It would be an act of mirical that such a damaged tooth could repair its self, because it has been poisoned way too long and most likely houses what is called lymes disease today. A good dentist will want it pulled, while the evil dentist will want to chop it off and give your 2-3 root canals and if cracked too badly, install a metal post.
"IF" you had the health to cure such a tooth, you would have the health to not have the decay in the first place.
TOOTH PREVENTION is natural, while dental work is permanent damage. Keeping in mind going to the dentist in the first place is asking for poisons.