Article: Fluoride is put into toothpaste and dental rinses to replace the calcium component in the enamel compounds with fluorapatite, a substance that is resistant to demineralization by acids. Fluoride toothpastes help remove bacterial plaques and can strengthen tooth enamel. Fluoride ions replace calcium ions, which strengthens the enamel.   Fluoride can also help the process of remineralization in part because it is anti-microbial, killing off the oral bacteria that often is an underlying cause for teeth to lose their enamel.  If your teeth are sensitive, use a toothpaste for sensitive teeth. These types of toothpaste can help reduce gum inflammation as well.  There are some tooth remineralization toothpastes, liquids, and powders.  Ask your dentist for her recommendations. You should also only use a fluoride toothpaste with a seal from the American Dental Association. You can also use a special toothpaste meant to rebuild enamel, such as Squigle Enamel Saver toothpaste, which has fluoride in it. Fluoride is helpful but not necessary for remineralization. It makes the teeth stronger, but teeth don’t actually contain the substance the toothpaste puts back into them. Because of this, there are ways to remineralize without fluoride. Toothpastes without fluoride reduce the bacteria in your mouth. They do this with xylitol, a sugar alcohol that reduces the adherence of plaque-forming bacteria to your teeth.  These toothpastes also replace the calcium and phosphate used in your tooth enamel.  Common toothpastes without fluoride Redmond Earthpaste, Dr Collins Restore toothpaste, Apagard Premio toothpaste, and Tom’s of Maine Cavity protection. Instead of buying over the counter toothpaste, you can make your own at home. Use 4 tablespoons (59.1 ml) of calcium carbonate powder. You get this powder from crushing calcium carbonate tablets or by buying the calcium powder in bulk. Add to it 2 tablespoons (29.6 ml) baking soda, ½ to 1 packet of stevia, and 1 teaspoon sea salt. Mix together. To that, add enough coconut oil to make a paste. Once it is a paste, add a few drops of peppermint oil until it is minty enough for you. Mix completely. Dip your toothbrush into the paste and brush.  You can make a larger batch of this at any time, just seal it in a jar and keep it in the refrigerator to keep it from spoiling. If you want to whiten your teeth or have stubborn stains, add 2 teaspoons of 3% hydrogen peroxide. It will cause some foaming and perhaps some tingling, but don't worry. That is normal.  Hydrogen peroxide is antibacterial and works as a bleaching agent. Don’t use anything stronger than a 3 % solution because higher concentrations can burn and irritate the gums and mouth.
Question: What is a summary of what this article is about?
Use fluoride dental products to strengthen your tooth enamel. Buy fluoride-free remineralizing paste as another option. Make your own remineralizing toothpaste for a natural option.
Article: The coating, or getter, is on the top part of the tube. Normally it’s gray, black, or silver. A white coating means the tube has a crack. In this case, it’s time to get a new tube. Put the tube into your guitar amplifier, tester, or other tube-using machine. Turn on the machine to activate the tubes. The heated filament inside the tube should glow orange like a setting sun. This is usually a sign that the tube is healthy.  The filament may be hard to see. If you don’t see the glow, that doesn’t necessarily mean the tube is bad. Keep in mind that some tubes glow more than others. If the tube doesn’t seem to glow at all, try touching it. Be very careful, since tubes get hot when they’re active. A cold tube is one that no longer works. If the device doesn’t turn on at all, this may be a problem with the device’s fuse. Replace the fuse or have an expert inspect it. The wires are inside the tube, easily visible behind the glass. When electrified, they may give off a purple glow. Purple concentrated around the wires is a sign that the tube is defective. You may notice a blue glow concentrated around the glass. This is normal. Purple around the glass is also normal. Sometimes the plating inside the tube turns red. This can be a sign that the tube isn’t installed properly in your electrical device. If the tube stays red, it can’t control the electrical current, which will eventually damage your device.
Question: What is a summary of what this article is about?
Inspect the tube’s colored coating. Plug the tube into an electrical device to check its glow. Look for a purple glow around the internal wires. Replace the tube if it glows red.
Article: You must marry within 60 days of issuance. After the license expires, you must start the application process all over again.  You can get married in any county in Washington. You are not limited to the county from which you received the marriage license. You must be married by a proper officiant, which is prescribed by state law. These include active and retired supreme court justices, judges of the appellate and superior courts, superior court commissioners, any regularly licensed or ordained minister or any priest of any church or religious denomination, and judges of courts of limited jurisdiction. The officiant should sign the license. You also need two witnesses to sign. They should both be over age 18. Within 30 days of the marriage you must return the signed license to the county office which issued it to you. You can purchase certified copies from the Auditor's office.
Question: What is a summary of what this article is about?
Marry soon. Get the license signed after the marriage. Return the signed license.