Added: 12/26/2005 |
What are Permanent Teeth and the Importance of Central Incisors and Third Molars?What exactly is a tooth? Commonly referred to as Macroscopic dental structure, a tooth is used to nibble food and for chewing. There are three functional groups of a tooth: one nibble-group and two grind-groups. The tooth form corresponds to its function. A nibble group includes incisors and the canine tooth. The tooth crown of incisor has a cutting side and no sharp conical form unlike a canine tooth. There are 12 nibble teeth, 6 per each jaw.
Incisor teeth are divided into central incisors and lateral incisors. The lateral incisors are smaller than central ones. Their form is also a little bit different.
The grind teeth include 8 premolars and 12 molars. Grind teeth have a multi-tubercular structure.
The tooth skeleton consists of a dental crown, a dental cervix and a root of tooth. A tooth crown is located above gingival side. It is covered by tooth enamel. The form of the tooth crown corresponds to the tooth function, e.g. the incisor crown has a form of a shovel, and the canine tooth crown form is conical. Their function is to nibble on food. Premolars and molars crowns are multi-tubercular and the form is cylindrical.
The dental cervix is located between the tooth crown and the root of the tooth.
The root of the tooth is the base part of the tooth. It is covered with cement. The joint point of the cement and enamel is called the enamel and cement border.
Teeth can be differentiated by the number of roots. There are single-rooted teeth, double-rooted teeth and triple-rooted teeth.
The tooth surface directed to the check is called vestibular; another one is the oral tooth surface. Teeth are divided into permanent teeth and primary teeth. They are differentiated by the date of their dentition. Permanent teeth are bigger than the primary ones.
There is a variety of the molar and the third molar is known as the so-called wisdom tooth. It grows behind the second molars at late juvenile age. There could be four third molars: upper left, upper right, lower left and lower right.
If the third molar is not fully grown and does not take part in dentition it is called a deep third molar. It is caused by improper position of the tooth (improper slope) or by dentition space insufficiency. Usually growth of the third molar eruption can be a little bit painful. If the third molar is deep-rooted, your dentist can offer to extract it. Because of its difficult-to-reach position, this tooth can cause different disorders and it is difficult to perform any treatment on the tooth.
Teeth perform a complex biodynamic function in the mouth and they are one the main organs of teeth and jaw system. Teeth help to capture, bite off, split and grind the food. Moreover, teeth take part in speech generation.
But in recent years it has appeared that not all of the functions of teeth have been discovered. Swiss scientists discovered an interrelation of memory function and the number of teeth. As it was found that people with extracted teeth have less capability to perform their jobs. Scientists announced that teeth, especially permanent teeth, are not only for chewing but for our brain function performance.
If a tooth falls out on its own is not as serious as if a tooth was extracted.
Japanese scientists proved that memory volume is related to the number of teeth in your mouth. Thanks to experiments with monkeys and rats, researches discovered that when a tooth is extracted a nerve connected with brain is broken.
Swiss specialists made an investigation in which nearly 2000 men and women participated. Their age was 35-90. And the experiment proved that permanent teeth extraction (people and animals) reduces one's memory.
There was more I wanted to add to this article but I forgot.
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