the function of post.. provide retention for a core



the function of post:
a- provide retention for a crown
b- enhance the strength of the tooth
c- provide retention for a core***
d- provide the root canal sealing.

Teeth and gums play an important role in overall body health, but sometimes it's hard to know how to take good care of them. Your teeth and gums are made of several types of tissue, all of which must be fed and protected to ensure optimal health. It is important to take care of the teeth and gums in all stages of life, from the prenatal period to adulthood.

+ Choose the right toothbrush. Choosing a toothbrush in a store is not easy. The variety of colors or characteristics is such that there is enough to break the head in this single ray. It's better to choose a toothbrush that's right for you than to buy the most expensive brush with the most features. The following things should be considered first in choosing your toothbrush.
- A suitable size. Large toothbrushes can be more difficult to maneuver. A toothbrush about 1 cm long and 1 cm wide is suitable for most adults.
- The good texture of the hair. The hairs are either "soft" or "medium" or "hard / firm". A soft bristle brush is suitable for most people because it is flexible enough to clean the gum area without bleeding.
- The brush is approved. Check if the toothbrush you are planning to buy is approved by the dental associations. Even if a brush that is not approved could still be good to use, you will feel more at peace if you know that your choice is approved by a respectable dental agency.
- Manual or electric? There is no good answer to this question. As long as you brush your teeth regularly, they will probably be in good health. If you opt for an electric brush, make sure to choose a brush that oscillates, as this movement is the most effective for removing plates.

+ Brush your teeth properly to maintain their vigor, at least twice a day. Regular brushing prevents cavities while maintaining the strength and functionality of your teeth. With proper care, your teeth and gums can stay healthy throughout your life. The healthier your teeth and gums are, the less likely you are to have cavities and gum problems. Brush your teeth if possible after each meal [4].
- You should position your toothbrush at a 45 ° angle to the gumline and move it to the surface of your teeth in a circular motion and up and down.
- During brushing, do not apply too much pressure on the teeth. Make sure that the end of the hair can penetrate between the teeth.
- Clean the inside and outside surfaces of your teeth, the chewing surfaces, not to mention the grooves and crevices.
- Carefully clean the inside of the lower front teeth and the outside of the upper back teeth, as these are the surfaces that collect the most tartar.
- Make your brushing last for 2 to 3 minutes. Once you're done, rinse your mouth with water or mouthwash.

+ Floss daily. Regular use of dental floss (once a day) helps prevent tooth decay. You could choose a nylon (or multifilament) or PTFE (monofilament) yarn. Both types of wire should effectively remove plaque and residue even if PTFE is slightly more expensive and does not present a risk of fraying.
- Prepare a length of wire about 50 cm.
- Wrap it around your two majors, stretching it well and keeping an open section of 3 cm of yarn.
- Brush first the upper teeth, then the lower teeth.
- Stretch the thread between your thumbs and your index fingers and gently pass it between your teeth in a friction-sliding motion.
- Do not force, because you could damage your gums.
- Once the wire reaches the gum line, form a "C" around a tooth, then manipulate it in the space between the tooth and the gum.
- Rub the thread on the side of the tooth, in a movement up and down and away from the gums.
Use a new section of wire when moving to another tooth.
- Use caution when passing the wire behind the last molars.