What causes a cavity?=Min okozza a szuvasodást?
Your mouth is a busy place. Bacteria - tiny colonies of living organisms are constantly on the move on your teeth, gums, lips and tongue.
Cavity AnimationHaving bacteria in your mouth is a normal thing. While some of the bacteria can be harmful, most are not and some are even helpful.
Certain types of bacteria, however, can attach themselves to hard surfaces like the enamel that covers your teeth. If they're not removed, they multiply and grow in number until a colony forms. More bacteria of different types attach to the colony already growing on the tooth enamel. Proteins that are present in your saliva (spit) also mix in and the bacteria colony becomes a whitish film on the tooth. This film is called plaque, and it's what causes cavities.
Tobacco and Healthy Teeth Don't Mix Go To Home Page
Do you smoke? If you don't, you probably know some friends or see other students at school who do. Too many young people today are getting addicted to tobacco, and the results are showing up in their mouths.
Smoking or using smokeless "chewing" tobacco can make you four times more likely of developing oral cancer (especially on the rise in women as more younger girls take up smoking) - and it's not just something that older adults get anymore.
On top of cancer, tobacco causes:
decreased senses of taste and smell
poor healing of mouth sores
Really Gross Pictures
Young people who think that smokeless "chewing" tobacco is somehow safer than lighting up are putting themselves at terrible risk of illness. Chewing tobacco releases a variety of chemicals into the body and often causes mouth sores, cracked and bleeding lips and gums, and can lead to cancer of the throat, mouth and gums.
How does Tobacco
affect oral health?
Tobacco contains many substances known to be cytotoxic (destructive to your body's cells and tissues). Smokers have more calculus (hardened dental plaque) than nonsmokers, and heavy smokers have more calculus than light smokers. The Nicotine in tobacco causes something called vasoconstriction (narrowing the blood vessels). Blood circulation - certainly an important thing! - has been shown to decrease by as much as 70% in your mouth during the smoking of a cigarette. Tobacco smoking, furthermore, also affects your body's immune responses (defense system).
New studies are even showing the possibility that second-hand tobacco smoke (the smoke from someone else's cigarette) causes periodontal disease (gum disease).
Sugar? In tobacco?
We all know that sugar is a major cause of tooth decay. More than one-fifth of the content of some brands of smokeless "chewing" tobacco is sugar, and causes a much greater risk of developing cavities.
Tooth Growth and Development
What's the difference between "baby" teeth and permanent teeth? At between six and ten months of age, most infants begin to get their "baby" teeth.
The Central Incisors (front middle teeth) usually come in first, and then teeth begin appearing on either side and work their way back to the second molars. By the time a child has reached three years old, most of the "baby" teeth should be present.
The process begins to repeat itself when the child is about seven years old. The Central Incisors fall out first and are replaced by permanent teeth. By the age
of 21, most people have all of their permanent teeth.
"Baby" teeth are important because they hold the place for permanent teeth and help guide them into correct position. "Baby" teeth play an important role in the development of speech and chewing.