Who likes to go to the dentist? Nevertheless we go because we have to. Almost every year I had dental work, cavities, or putting a crown on a tooth. About eight years ago (around 2000) I read up about what causes cavities.

Wikipedia puts it as follows: "Dental caries, also known as tooth decay or cavity, is a disease wherein bacterial processes damage hard tooth structure (enamel, dentin and cementum). These tissues progressively break down, producing dental caries (cavities, holes in the teeth). Two groups of bacteria are responsible for initiating caries: Streptococcus mutans and Lactobacillus. If left untreated, the disease can lead to pain, tooth loss, infection, and, in severe cases, death. Today, caries remains one of the most common diseases throughout the world." and "Tooth decay is caused by specific types of acid-producing bacteria that cause damage in the presence of fermentable carbohydrates such as sucrose, fructose, and glucose. The mineral content of teeth is sensitive to increases in acidity from the production of lactic acid. Specifically, a tooth (which is primarily mineral in content) is in a constant state of back-and-forth demineralization and remineralization between the tooth and surrounding saliva. When the pH at the surface of the tooth drops below 5.5, demineralization proceeds faster than remineralization (i.e. there is a net loss of mineral structure on the tooth's surface). This results in the ensuing decay."
I have put the sucrose, fructose, and glucose in bold. We have so much of those sugars in our food and drinks, that the mouth bacteria are having a feast. You would be surprised how much of those sugars is present in a typical diet: bread, buns, corn flakes, cheerios, wheaties, cakes, brownies, muffins, donuts, ice cream, milk shakes, cocoa, jelly, marmalade, pies, pudding, syrups, canned fruit and juices, soft drinks and so on.
It has been known for a long time that refined white sugar is bad not only for your teeth, but for the rest of the body as well. It produces an acidic condition in the digestive system. This drains the body of vitamins and minerals and the consequences can be life threatening. For example the metabolism of sugar requires leaches calcium from the bones and teeth which can lead to tooth decay or osteoporosis. Sugar also depletes the body of potassium and magnesium, which are required for proper cardiac function, and is therefore a major factor in heart disease. It compromises the body's immune system and stresses the pancreas by forcing it to produce a rush of digestive enzymes. This can lead to the formation gallstones and diabetes. It depletes stores of vitamin B, which is our brain food, and can interfere with memory, concentration and other mental functions. It makes the blood very thick and sticky, inhibiting much of the blood flow into the minute capillaries that supply our skin gums and teeth with vital nutrients. Refined sugar has been shown to increase wrinkles and dry aged skin.
When excess sugar is eaten, it is first stored in the liver. With continued consumption the liver expands like a balloon and begins to function poorly. An improperly functioning liver can quickly lead to high blood pressure, skin disorders and acne to name a few. In addition, most people consume far more sugar than their bodies can possibly use for energy. When this happens, the liver converts the extra sugar into molecules called triglycerides and stores it as fat, or else produces cholesterol from the by-products of sugar and deposits it in veins and arteries. Sugar is thus a major factor in obesity and arteriosclerosis.
So I stopped eating anything with those sugars in it. This meant not buying anything of the above, and making our own bread and cakes replacing the sugars above with what is known as 'evaporated cane juice sugar'. I read that evaporated cane juice sugar, raw sugar cane juice, is pretty good, being alkalizing and relatively low on the glycemic index (=the effects of carbohydrates on blood sugar levels). Evaporated cane juice sugar still has most of its minerals, while white sugars are highly refined and pure. I don't know for sure if evaporated cane juice sugar does not contribute to tooth decay, although being alkaline will certainly help. In any case I didn't get cavities anymore.
I also started flossing after every meal, three times a day. There are so much food particles that are trapped between the teeth after every meal. Bacteria feast again. So, flossing also helps a lot.
Then I came across the Zapper, a small electric device that produces a small current through the body. It penetrates only about an inch below the skin, and thus it is mainly used to kill microbes in the blood stream. But I figured that it would also help to treat my gums and teeth with it. With the Hulda Clark type Zapper, one electrode I held against one cheek while the other electrode was held in my hand. Holding the two electrodes on either side cheek is too strong. By killing the tooth decay causing microbes on my teeth, will certainly reduce the tooth decay.
Eventually, I stumbled upon the magnetic pulsers. Their magnetic field reaches about six inches deep into the body, causing a tiny current in cells, and disabling bacteria and viruses. A daily dose of magnetic pulses keeps my mouth free of the tooth decay causing bacteria. I cannot prove this, but I have found that magnetic pulses immediately put a stop to any infection I have had.
In any case, I have not had any tooth decay in many years. And my dentist was surprised that my teeth have very little plaque compared with other people, since I started to implement all the above measures.
A word about fluoride (in tooth paste and the water supply). Animal studies Mullenix and co-workers conducted at Forsyth in the early 1990's indicated that fluoride was a powerful central nervous system (CNS) toxin, and might adversely affect human brain functioning, even at low doses. Fluoride also has other adverse effects in the body, like buildup in the bones making them more vulnerable to fracture.
Aside from the fact that fluoride is a powerful toxin, it does not do the teeth any good. First you have to know what teeth are made off. Each of your teeth has three layers to it: the pulp, the dentin and the enamel. The pulp is a soft core, where the blood vessels and living parts of the tooth are, kind of like the core to a cantaloupe. The enamel is what you see when you smile in the mirror. The dentin is the layer in the middle. It's harder than the pulp and softer than the enamel. Both the dentin and the enamel are made up of a meshwork of protein and of pure crystals called hydroxyl apatite, which stack on top of each other to form a microscopic version of columnar basalt. If you look closely enough at your teeth, you will see vertical lines from edge to edge. These are the columns of hydroxyl apatite. The enamel and dentin are constructed differently enough, however, that the enamel forms as a hard shell and the dentin forms more pliable. Together, the protein and the hydroxyl apatite form a structure, which gives strength to your teeth. Each of these hydroxyl apatite crystals is made up of calcium and phosphorous.
When you introduce fluoride to the calcium and phosphorous within your saliva, the fluoride replaces one of the molecules in the calcium phosphate crystal. Because the fluoride is more reactive than calcium and phosphorous, it literally replaces the hydroxyl ion at the apex of the hydroxyapatite (calcium phosphate) crystal in your dentin and enamel. If you substitute fluoride for that hydroxyl group, you draw the unit cell closer together, shrinking the size of the cell. Fluorine is so much more electronegative than oxygen in the hydroxyl ion it actually makes the unit cell of fluoroapatite shrink. The consequence of reducing the unit cell, is that it becomes acid resistant. Fluoroapatite is roughly 10 times more acid resistant than its counterpart hydroxyapatite. You are making them more resistant to acid. But teeth don't as often break from walnuts as they do from caries. Weakened, brittle enamel is a result of fluorosis, a condition where a large excess of fluoride has been introduced into the tooth structure. If you ingest too much fluoride, you will start producing too many fluoroapatites which will reveal themselves in the form of white splotches on your teeth. This is called "dental fluorosis." The individual splotches are actually high concentrations of fluoroapatites, which are incredibly resistant to acid, but also very brittle, like chalk.
I also discovered that most tooth pastes contain glycerin (which has a sweet taste) which coats the teeth for a long time (it is very sticky), preventing the teeth from re-mineralization. http://www.inspiredliving.com/mouth-care/ 
I used the Vicco Pure Herbal Ayurvedic Toothpaste, which doesn't have the glycerin, but it is not the only brand that is more healthy than the main stream tooth pastes. There is also the traditional baking soda and salt mix, what I am using now.
 
 
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