Let's metabolize the common sense of toothbrushing!

小林 祐也(ゆーや@ライフハッカー)

I send out life hack information such as healthcare and promote the metabolism of common sense! His main book is " Let's metabolize common sense of health! "

What is the best toothpaste?

So far, I have tried to organize the information and know-how that I learned as a result of investigating toothpaste in various ways through repeated questions, so I will share it!

Recommended for such a person

  • Those who are making an effort to take care of their teeth
  • Those who want to know how to brush their teeth without making cavities
  • Those who do not want to shorten the life of their teeth

Let's metabolize common sense about "toothpaste"

Common sense metabolic point

Old common sense

Toothpaste is done with toothpaste

New common sense

Toothpaste is not always the correct answer because it contains harmful ingredients

First of all, it is common sense about toothpaste that you are familiar with toothbrushing.

Beware of harmful ingredients in toothpaste!

I also had that common sense to brush my teeth with toothpaste. But really that's the best way to brush your teeth? Because this was a doubt, when I examined commercially available toothpaste, I found that there are many risk components lurking in toothpaste. Let's introduce typical things.

Na lauryl sulfate = synthetic surfactant inducing taste disorders

Almost all commercially available toothpaste contain synthetic surfactants. Synthetic surfactants are used to laver and wash the surface of teeth, and in general, a compound called Lauryl sulfate Na is used. This lauryl sulfate is Na, but it is a substance with a strong toxicity.

Harmful when swallowed Harmful eye irritation when in contact with skin Irritation to the respiratory system Toxicity to aquatic life Quote: International Chemical Safety Card (ICSCs)

As mentioned above, it has considerable harmfulness. I feel that it is inappropriate as a component of toothpaste, such as harmful when swallowed or harmful when in contact with the skin w

It has been reported that taste changes and taste decline occur after brushing teeth using commercially available toothpaste, and this action is thought to be due to the surfactant sodium lauryl sulfate (SLS) contained in toothpaste Citation: Effects of surfactants on taste neuroreaction Tooth Fundamentals Journal 19: 463-468, 1977

In addition, it is thought that this sodium lauryl sulfate is the cause that the taste change and the taste decrease do not become the taste of the food for a while after brushing teeth. One theory is that the taste of the tongue (the cells that feel the taste) is temporarily dissolved.

Preservatives with paraben-mitochondrial toxicity

Many toothpaste use preservative parabens.

 To date, it has been confirmed that the antimicrobial action of parabens has been stronger as the alkyl side chain is long, but since the strength of mitochondrial respiratory inhibitory action (mitochondrial toxicity) agrees with MPB and PPB, it is suggested that mitochondrial respiratory inhibitory action is included in one of the mechanisms of expression of bacteriobacteric action on eukaryotes such as mold and yeast of both parabens. It was reconfirmed that MPB and PPB showed mitochondrial respiratory inhibitory action. Though the effect is not cooperation, and the effect on the human body seems to be little because of the property that it is easily hydrolyzed, it is also confirmed that smoking cessation parabens have estrogen-like action at concentrations less than daily intake allowance (ADI), and it is desirable to refrain from taking large amounts in a long-term view. Citation: Bulletin of The Faculty of Nursing and Nutrition, Kagoshima Junshin Women's University Vol. 17:59~64,2013

This paraben, as described above, has antimicrobial action that suppresses the growth of bacteria and mold, etc., and at the same time has toxicity to mitochondria.

As the quotation states, "It is desirable to refrain from taking large amounts from a long-term perspective", mitochondrial dysfunction is involved in many diseases such as cancer, diabetes, neurodegeneration, ischemia, etc., so it is better not to take it if possible. It's like a double-edged sword.

Saccharin Na = diabetic-inducing flavorings

Many of them contain saccharin Na as a flavoring agent. It is a type of synthetic sweetener and is also recognized as a food additive.

When glucose or saccharin, one of the artificial sweeteners, was administered to mice treated with saccharin, glucose tolerance abnormalities (Note) were observed in sugar-loading tests. In humans, glucose tolerance abnormalities were observed by saccharin administration, and changes in the intestinal flora before and after administration were observed, and transplanting the intestinal flora to mice after administration caused glucose tolerance abnormalities, and it was considered that glucose tolerance abnormalities occurred due to changes in the intestinal flora due to saccharin. Note: Glucose tolerance refers to the ability to keep blood glucose levels within the normal range, and a condition in which blood glucose levels are higher than normal, although not as much as diabetes, is called glucose tolerance abnormalities. If there is an abnormality in glucose tolerance, there is a high risk of developing diabetes in the future, and arteriosclerosis is more likely to progress than those with normal glucose tolerance. Citation: Japan Agriculture and Livestock Industry Promotion Agency

However, as mentioned above, it is a substance that can cause diabetes.


The toothpaste I had left at home.

How to avoid toothpaste

Knowing this kind of information makes you no longer want to use toothpaste. Let's take a look at what can be used as an alternative.

Alternatives to toothpaste

  1. sodium bicarbonate
  2. oil
  3. Negative Ion Toothbrush

I think that there are some people who are surprised that all are unexpected items.

The mechanism will be introduced in the next section and later.

Let's metabolize common sense about the process of tooth decay!

What is tooth decay next? I found out by investigating.

Common sense metabolic point

Old common sense

Cavities are irreversible (need to be treated)

New common sense

The initial stage of the cavity is a reversible reaction (heals without treatment)

Do you have the image of an "irreversible process" that you can't cure yourself if you get cavities? In fact, tooth decay is a "reversible process" that can be cured by oneself until a certain state. Knowing the process of tooth decay changes the consciousness of the mouth after meals. You may have noticed that chewing toothpaste and gum, which I was trying to make because I did not want to make cavities, actually cut the life of my teeth. We hope you'll update your common sense to make your efforts work the right effect.

Process of tooth decay

Adhesion of plaque

After meals, bacteria that are always present in the mouth break down and metabolize sugars and lean acidically. In the acidic state, saliva bridges and connects teeth and plaque (*).

※Plaque = plaque

It is a mass of adhesive substance produced by bacteria and their bacteria, with a composition of 75% of them, and the rest of which are produced by bacteria. The adhesive material serves as a barrier and prevents the entry of saliva.

Tooth demineralization and remineralization

Demineralization = tooth corrosion due to plaque

If the plaque is left as it is, bacteria in the plaque decompose sugar during meals and drain the acid. This acid increases, and when the pH on the surface of the tooth is 5.5 or less, the tooth melts.

The phenomenon of melting this tooth is called demineralization . The pH in the mouth inclines acidicly for 40 minutes after meals, during which the teeth continue to melt. Toothbrushing in this condition is not recommended. This is because the teeth are easy to melt, so it is easy to shave when brushing your teeth.

Remineralization = repair of teeth using saliva minerals

In the neutral region where the pH is 6.0 or higher, tooth demineralization stops. During this pH, the teeth are repaired by phosphoric acid and calcium in saliva. This phenomenon is called remineralization.

Progression of tooth decay = demineralization > remineralization

In daily life, the above-mentioned demineralization and remineralization are repeated. Cavities progress in the case of demineralization > remineralization.

We had an image of an irreversible event with tooth decay, but it's actually a reversible event.
It's good to increase the amount of remineral lime!
So, each time you eat, you'll break away from ashes each time you eat, so it's better not to eat too much
er, that's it!
If you really want to snack, you can choose one that doesn't contain sugar Nuts
I understand eating nuts!

Tooth decay progression

The degree of progression of cavities is categorized from C0 to C4 depending on the tooth part.

Cavity Stage

If the green progression in this figure is the degree of progression, it can be cured by remineralization. I tried to organize the state and pain of the degree of progress in the table below. Please refer to it.

stageCorrosion reaching locationsStatepainTreatment methods
RemineralizationTreatment at the dentist
C0Tooth surfaceThe surface of the tooth is demineralized on the surface of the vitiligo and cloudiness enamel, and it looks white.WithoutAvailable
C1enamelthe state in which enamel reaches the inner surface ofWithoutAvailable
C2dentina cavity that has reached dentin beyond enamelSince it has not reached the pulp, there is no strong pain It bites with cold things and sweet things When progressing, hot things also bitepassable?The corrosion part is shaved off, and the buried thing is made.
C3nerveCavities that have reached the pulp There are no subjective symptoms, and cavities may have progressed to the pulp. The infection of bibacteria advances fast, the nerve is killed, and it comes to have the bag of pus ahead of the root when left. (Percussive periodontitis)In addition to the above, it may cause pulpitis and severe pain.NotNeed for nerve-taking treatment (root canal treatment)
C4The tip of the root of the nerve (crown)The decaying of the teeth due to tooth decay, leaving the roots Most of them are infected with bibacteria at the tip of the roots. (percuss periodontitis) If left alone, it will progress more and more and the need for tooth extraction will increase.dittoNotNerve-taking treatment (infection root canal treatment) or tooth extraction

Determination of cavities

It is said that tooth decay cannot be judged by appearance. Even if it is black, it may not be cavities. If you are worried, let's go to the dentist.

Caltar production

If plaque is left untreated, the saliva component phosphoric acid and calcium will settle and become firmer and firmer. And it is said that if left as it is, it will take 2 to 14 days to become tartar.

If it becomes tartar, it will not be possible to remove it unless you go to the dentist.

Do you chew gum?
Yes, gum with xylitol prevents tooth decay. It's effective because it gets a lot of saliva, right?
Yes, saliva is effective, but if you have plaque, you may make tartar
Well, say it now! What happens when tartar is made?
As soon as the tartar is made, blood comes out of the gums, it smells and it is the worst, especially the back of the lower front teeth is in front of the saliva line, so be careful because it is easy to make tartar
Ok , gum will be chewed after removing plaque properly

Let's metabolize common sense about how to brush your teeth!

After you know about toothpaste and cavities, we will introduce effective toothpaste methods to prevent tooth decay and recommended toothbrushes.

Post-meal care: recommended ways to brush your teeth

Rinse your mouth after a meal! Including baking soda if possible!

If there is sugar, bacteria in the mouth will produce acid. Therefore, after eating, first rinse your mouth, remove sugar, and prevent plaque production.

At this time, let's include baking soda in your mouth if possible. Baking soda is a type of salt that exhibits weak alkalinity (pH = 8) when dissolved in water, and there is no problem in the mouth or drinking.

If baking soda is included in the mouth after meals, it is effective to stop demineralization by bringing the pH in the mouth that leans acidicly to neutral. In addition, baking soda has polishability, so it can also serve as brushing to some extent just by rinse the mouth.

When using baking soda, choose medicinal or edible products instead of cleaning. If baking soda is included in the mouth, it is good to do it within 20 minutes after meals, which is prone to demineralization.

Oil in your mouth!?

In addition, there is a "rinse your mouth with oil" health method, which originates from the natural remedies of Ayurveda, a traditional Indian medicine called oil pring.

They brush their teeth

Use a negative ion toothbrush

The point of toothbrush is how well you can remove plaque. Recently, toothbrushes that provide negative ions in the mouth when brushing with various mechanisms have been released.

If you use this, it will be easier to remove plaque, and you will also hear the adjustment of the pH in the mouth. Over-brushing can also shave your teeth too much. If you use a negative ion toothbrush, you can remove plaque just by lightly apply the tip of the hair, so let's perform lightly on the finish. The tip of the hair is soft and it will be just right.