Why do we change teeth? Why lose primary teeth?

June 6, 2019 / BIOON / - dropping the first deciduous tooth is a very important part of the growth process We need teeth to bite and chew so that we can enjoy a healthy diet with many different types of food Teeth can also help us speak and read difficult words They help us grow our chin and face, and of course, teeth help us smile Photo source: http://cn.bing.com because we need them so much, teeth grow even before we are born We didn't see them at first because they were growing in our jaws, under our gums But when we grow to six months old, we can see that different teeth have different uses Most people will eventually have 20 baby teeth They are our first set of teeth As we grow older, they will be replaced by adult teeth The last deciduous tooth usually falls off around the age of 12 The teeth at the front of the mouth are called incisors They have sharp edges for biting things (just like we do for apples) Real sharp teeth are called canine teeth, we need them to bite food In the back, we have molars They are big teeth with lots of bumps and grooves to help us chew Adults also have premolars (but children don't) Often we don't notice that our first baby tooth begins to fall off and new teeth grow in the back of our mouth This is our first adult molar Around our sixth birthday, we may begin to see and feel some changes in our mouth Our baby teeth are wearing out because they keep biting and biting Our whole body is bigger, our jaw and mouth are bigger So it's time to grow bigger teeth Teeth also have teeth in their mouths because, like trees, their roots hold them in their mouths Photo source: http://cn.bing.com root is usually long and smooth The anterior teeth usually have only one root, but the posterior teeth can have as many as three When the time is right, our body will have some special cells that will slowly erode the root of the tooth As the roots become shorter, the teeth begin to loosen At last, most of the roots disappeared and the teeth came out Soon, a new adult tooth will begin to grow out of the crevices left by the primary teeth Adult teeth look a little funny at first - they're usually a little yellow, have bumps and grooves, and of course they're much bigger They also have much longer roots Adult teeth are formed in this way, so they are strong enough to support our life You will also need to chew food for decades to come There's a lot of food to chew! The right teeth for the right job people have two sets of teeth because it's the most effective for our diet and the way we grow Animals are the same - their teeth match the way they eat and grow Mice like to eat with their front teeth, so their front teeth are growing all the time Alligators can grow new teeth whenever they need to, and sharks have rows of teeth that can be replaced at any time They have more teeth than us But people only have two sets of teeth, so we must try our best to take care of them, brush their teeth with toothpaste twice a day, and try to avoid sweet drinks and snacks Reference: [1] Why do we lose our baby teeth? 【2】 At what age do children start losing their baby teeth？ 【3】 Why Do We Have Baby Teeth 【4】 Why Do We Lose Our Teeth？