I came across this topic again but I don't know where to put it, so I'll just place it here.
Dentists nowadays are aware of the effect of sugars on dental cavity. But cavity, on its own, is really a tiny part of all the dental issues that we are having (e.g., weak teeth, weak gums, teeth misalignment). A more sustainable solution towards dental issues, is by changing our diet.
The current stance on wisdom teeth is that they just tend to be misaligned as we grow up, so wisdom teeth extraction seems a no-brainer. This illustrates a lack of understanding about how teeth grow to become the way they are, here comes Don Rehm (I also happened to send him things related to obstracized dentists years ago):
Progressive researchers have known for many decades that most tooth decay and most birth defects result from faulty living. One of the best books on this subject was "Nutrition and Physical Degeneration", written by Weston Price, a dentist.2 Price traveled to many parts of the world and noted that as primitive societies began to get the food products of the more advanced societies (sugar, white flour, canned goods, etc.), tooth decay, birth defects and other health probIems increased rapidly, where they had been nearly unknown previously. Included in these problems was a poorly developed dental arch with insufficient room for the teeth to come in. Books like this should be required in every dental and medical school, but they are not. The public is told nothing about how to prevent their miseries because there is more money to be made in trying to cure them.
It is said by those who don't know any better that we don't need so many teeth for our modern life and our jaws are therefore getting smaller. The real reason is that the faulty diet of the mother, and later that of the child, results in faulty skeletal development, leaving insufficient room for the teeth. Since few people are interested in really improving the diet of the public, these myths are allowed to persist.
Orthodontics, dental sealant, wisdom teeth extraction and the like, are only there because the dental industry fails to inform themselves (and the public) about how teeth work. Similarly, certain
sticky" food, such as the flour-based ones, have the tendency to stick on the teeth and gum. Unlike meat, food residues resulted from consuming flour-based food could be extremely hard to clean properly.
The fruits and vegetables, on the other hand, tend to serve as natural teeth cleaners. The strawberries, for instance, has the ability of whiten the teeth (ever heard of teeth whitening strip?

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It's customary for people to go to their dentist every half a year, be nagged that they need to clean their teeth, or get cosmetic add-ons, or extract their teeth. However, there are people who, despite making their best effort to take care of their dental health, are still faced with a myriad of dental problems.
How comes? Part of that missing piece is in their diet - It's hard to clean your teeth if you keep making it dirtier and more acidic
I guess the bigger message, is that some people will use any means to ensure his own survival, others just want to get richer beyond necessity, but I like to believe that most of us are good-natured, but victims of incorrect information.