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A Healthy tooth

dimanche 5 octobre 2014 | 14:12


What causes decayed teeth ?
The exact cause of tooth decay. or dental caries, is not yet known. However, extensive dental research has shown that sugar in foods and soft drinks is a major factor in causing decay. within a few minutes after sweets are eaten, the bacteria usually present in the mouth begin to act on the sugar to form acids. These acids can break down the enamel, or hard outer covering of the crown, and start a cavity.
Decay always begins from the outside of the tooth, not from the inside. It usually begins in pits of the teeth, in cracks in the enamel, or between the teeth where bits of food have lodged. Decay, once it has broken through the enamel, spreads into soft material called pulp.
At  this point infection usually set in and an abscess may from, accompanied by toothache.
How does a permanent tooth grow?
Permanent teeth from under the primary teeth. As the permanent teeth grow, the roots of the primary teeth gradually dissolve. With the roots gone, the primary teeth fall out and the permanent  teeth replace them.
A permanent tooth erupts before it is completely formed. Your permanent lower second molar, for example, started to from when you were about tow and a half or three years old. By the time you were seven or eight years old, the crown of the tooth was completely formed in your jaw.
The tooth erupts  when you are between eleven and thirteen years old . but the root is not entirely formed until you are about fourteen or fifteen years old.
What makes the gums bleed?
The main reason why the gums may bleed is irritation caused by soft  deposists and tartar that has formed around the neck of the teeth. This tartar is a hard substance---yellow or greenish in appearance---that collects if the teeth are not cleaned adequately. Once the tartar has collected, you cannot get all of it off no matter. The tartar can be removed only by the dentist’s cleaning of your teeth.
Other possible causes for bleeding of the gums are rough places on fillings in your teeth, too much pressure on some teeth because of a faulty “bite”, and pieces of food caught in the spaces between the teeth and the gums.
What kind of toothbrush and toothpaste should be used?
The best kind of toothbrush is one that has a flat brushing surface and firm bristles. It should be small enough to reach all areas of the mouth.
Much research has been done in developing new types of toothpaste---by adding fluorides, for example--- to help reduce dental caries, or tooth decay. It is a good idea to ask your dentist for up-to-date information on this.
If the pulp is injured, it becomes much more difficult for a dentist to save the tooth. That is why periodic visits to the dentist are important. Such visits give the dentist a chance to discover small cavities and fill them before the decay becomes serious.
What can we do to have healthy teeth?
Generally speaking, a balanced diet that is adequate for normal growth and development of the body is adequate for building and maintaining the health of the teeth and their supporting structures---the gums and the jawbones. Calcium is essential for the cells that from teeth and bones. the enamel  of the teeth begins to develop within the completed  around the eighth year for all but the third molars. The crowns of the third molars, or wisdom teeth, are not completed until between twelve and sixteen years of age. An insufficient supply of calcium in the diet when the poorly is developing may result in poorly formed teeth.
Another aid to healthy attractive teeth is the practice of brushing the immediately after each meal or snack ---or when this is not possible, thoroughly rinsing the mouth with water. Periodic cleaning by the dentist is also important. When teeth are in irregular position their appearance and function may be improved through methods used by special dentist called orthodontists.
In many communities today, small amounts of fluorides are added to the in areas where there are no fluorides in the water, dentists recommend that the teeth be painted with a weak fluoride solution at regular intervals beginning at age three.

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