Are all the ape man s teeth rotten?

No, some of them swallowed melon seeds

It's not that it's old, sick, or accidentally lost haha.

No, some of them were knocked out by animals.

His parents gave birth to him like that,,, why did they have why.

The site of Zhoukoudian "Peking Man" is located about 50 kilometers southwest of Beijing, bordering mountains and plains. The mountains near Zhoukoudian are mostly limestone, and under the action of hydraulics, natural caves of different sizes are formed, which become the warehouse where the "keel" is buried, so the mountain is called Keel Mountain. There is a natural cave on the mountain that is about 140 meters long from east to west and wide from north to south, which is the place where Peking ape people inhabited 500,000 years ago, and they have lived in the cave in groups for more than 400,000 years, leaving behind their leftover food and used utensils, as well as their remains.

Later, the cave was buried by the sediment and falling stones.

After the discovery of the first site as early as 1918, after two excavations in 1921 and 1923, many mammal fossils were found, and most importantly, there were two human teeth in these fossils, which were the first discoveries of the bones of Peking Man. Since 1927, after many large-scale excavations, especially in the excavation on December 2, 1929, scientists found a complete hominid skull in the huge cave of Dragon Bone Mountain, Zhoukoudian is famous as the home of Chinese ape-man. According to the excavation site, scientists named this primitive man "Peking Man" and called the cave "Peking Man Ruins".

After the founding of the People's Republic of China, many large-scale excavations were carried out, and more than 40 Peking ape fossils of men, women and children were cleaned up, more than 100 kinds of animal fossils, more than 100,000 pieces of various stone tools, and several ash layers still preserved in the cave, the thickest layer was more than 6 meters, and a large number of burned bones and charcoal fragments were retained in the ash layer, which shows that the "Peking people" have long known how to use fire to roast prey and keep warm and protect against the cold.

Above the Peking Ape Man site, in a cave near the top of the mountain, is the site of the Cave Man on the Peak, where the complete skulls and skeletal bones of three adult men and women were found. Red hematite powder was found around the bones of the cave on the top of the mountain. The cave also found bone needles, perforated bone pendants, fish bones, tooth ornaments, and stone beads used by the cave people, which are enough to prove that they have learned to sew animal skin clothes to keep out the cold and know how to dress themselves, reflecting the germ of the primitive art of the cave people.

According to scientific estimates, the physical characteristics of the cave people on the top of the mountain are not significantly different from modern humans, and they are primitive yellow people; They lived 18,000 years ago, and their way of life was a big step forward from that of the "Pekingese".

The number of human teeth is between 28 and 32.

The 28 teeth are the most basic for adults, and the other four are wisdom teeth that erupt occasionally.

The 28 teeth are symmetrical up and down, each half of the upper and lower two rows have 2 incisors, 1 canine, 2 bicuspids and 3 molars, the four molars in the back row are also called wisdom teeth, each person has a different number of wisdom teeth, and some people may not have wisdom teeth in their lifetime. Wisdom teeth usually grow at an age of 18-30 years old, and if you don't have wisdom teeth before the age of 30, they will basically not grow at all.

Generally speaking, each person can grow two sets of teeth in their life, the first is 20 baby teeth (baby teeth), baby teeth begin to erupt at about half a year old, about 2 and a half years old, between 6 and 12 years old baby teeth fall out one after another, one by one by permanent teeth. The normal range of permanent teeth is 28 32, but less than 28 are due to congenital absence of permanent teeth or intrajaw ambush (ambushed teeth); More than 32 teeth are called extra teeth (also known as extra teeth), and the number of extra teeth varies and the shape is special. As for the phenomenon of a third set of teeth, it has also been reported, but its probability is only 11 million in humans.

There are three types of normal [adult] teeth:

Incisors: 4 above, 4 below. Also called "incisors".

Fangs: 2 above, 2 below. Also called "dog teeth" or "tiger teeth".

Big teeth: 8 on top, also called "molars" or "molars".

Wisdom teeth: Many people don't grow them, i.e. they have another one after the last big tooth.

Total: (4+2+8)*2=28 (without wisdom teeth)!

The front teeth are called incisors.

The front teeth are flanked by lateral incisors.

Then there are the canines (i.e., tiger teeth), bicuspids, first premolars, second premolars, first molars, second molars, and third molars.

The third molars are the standing teeth.

Some people don't grow.

So there are 32 teeth in a human being, and some have 28.

There are 20 baby teeth, 28-32 permanent teeth, and the middle 4 are wisdom teeth, normally one each from the top and bottom, the left and right, but due to the degeneration of the jaw of modern people, many people have not grown, and some people have not germinated evenly, and they have one or two.

Like I only have two on the top and none on the bottom, so I'm 30.

There are 20 baby teeth, and at the age of 6 to 7 years the baby teeth begin to fall out and are replaced by new permanent teeth.

Permanent teeth, the second set of teeth after the loss of baby teeth, numbered 28 32.

The average person's permanent teeth are 28 teeth + wisdom teeth (it is normal for wisdom teeth to grow 0 to 4, and the specific number varies from person to person).

Some people have 28 wisdom teeth without wisdom teeth, and some people are born with missing teeth and will not have 28, but the vast majority are 32, which is no doubt. Of course, those who have had their teeth extracted don't count.

People have 28-32 teeth, 28 in childhood, and as they age, they develop third molars, commonly known as wisdom teeth. There are 32 of them, but this varies from person to person, and some people don't have wisdom teeth.

As children grow older, their jaws gradually develop and grow. Generally, after the age of 6, teeth are replaced. Baby teeth gradually fall out, permanent teeth.

Sprouted one after another. Under normal circumstances, it takes about half a year for each baby tooth to fall out and the permanent tooth erupts. The first permanent teeth erupt in the second deciduous molars.

Posterior out of the first constant molars. At the same time, the constant central incisors erupted, the mammary central incisors fell out, followed by the lateral incisors, canine teeth, and the first.

The second and third molars grow sequentially.

Go out. Sometimes the first pair of cuspids erupts earlier than the caninees. Generally, the left and right teeth with the same name erupt at the same time, and the upper and lower teeth with the same name erupt earlier.

Go out. With the evolution of human beings, some people do not have third molars in their lifetime.

Tooth type Teething time Total number of teeth.

First molars (4) 6 7 years old 4

Incisors (8) 6 9 years 12

Bicuspid (8) 9 13 years 20

Fangs (4) 9 14 years old 24

Second molars (4) 12 15 years 28

Third molars (4) 17 30 years 32

When changing teeth, children have developed good oral hygiene habits. For example, rinse your mouth after meals, brush your teeth in the morning and evening, and use a healthy toothbrush correctly.

Wait. Correct malocclusion in time, otherwise it will not only affect the appearance, but also affect the chewing, breathing and speech functions, and hinder the normal hair of the body and face.

Parenting and health. If there is a tooth, commonly known as "earth and sky", correction should be carried out after the age of 5. Generally, malocclusion orthopedics are best left at the age of 12 to 16 years.

Right. It affects the development of teeth too early, and it is not easy to correct the calcification of bones too late.

There are 20 baby teeth, 28-32 permanent teeth, and 48 teeth can be seen on x-ray at the age of 6.

Generally 28 to 32, some do not have wisdom teeth.

Most of the modern people's brushing methods are wrong (or the toothpaste they use is not good), so at the end of the last century, there were statistics that showed that the tooth loss rate of people over 70 years old who had the habit of brushing their teeth was much higher than that of those who did not have the habit of brushing their teeth!!

Because many of the food of ancient people was high-fiber food, the front incisors needed to be cut off, and the back molars were grinded, and the wisdom teeth in the back were originally going to go through the back, but with the improvement of people's living standards, the wisdom teeth slowly degenerated and became useless, and they became the biggest toothache in modern people.

In the process of growth and development, there is a permanent tooth germ below the root of each deciduous tooth and gradually develops and grows, and the permanent tooth in the process of eruption, on the one hand, compresses the alveolar bone between the root of the deciduous tooth and the germ of the permanent tooth, and through the action of osteoclasts, the bone resorption is thinned until it is completely absorbed; On the other hand, it directly compresses the root of the deciduous tooth, so that the root of the deciduous tooth is gradually absorbed, becoming shorter and shorter, until it disappears completely. As a result, baby teeth begin to fall out and permanent teeth begin to erupt.

In fact, the length of human teeth is different, the average length is about 1 cm, as long as the gap is not large, it will not affect normal life, if the teeth grow out, uncomfortable, you have to do corrective surgery. Of course, if it doesn't affect your life or don't feel uncomfortable, it's better to maintain your natural beauty Now it costs thousands of dollars to do a correction.

There are also tiger teeth that are arranged in the order of teeth, so everyone has them, but some are pointed, some are flat, and the tiger teeth listen to its meaning, "tiger teeth", and its function is to tear the teeth needed for meat or tough food.

Teeth are called wisdom teeth, some people have long and some people don't, I guess you have wisdom teeth, hehe, wise people are like this.

Normal teeth 28-32, 4 of which are wisdom teeth, not everyone's teeth are the same.

The length of the teeth, from the root to the crown, is about right, "tiger teeth" is just an adjective, generally used to describe the fangs, that is to say, count the third tooth from the middle, so everyone has it, but some people's teeth are more round and blunt, not so obvious.

Human teeth are genetically determined, closely related to the shape of the face, and have specificity, and there is no specific number.