Where are the teeth? Is not that magic about how to come out and other disappearing from the gum of the jaw bones?
 
 Yes, whatever it may seem magical phenomenon of the eruption and exfoliation of teeth, so perfectly synchronized and orderly, there are some pre-training each tooth in line with the overall growth of the organism. The latest regulation of the process of tooth eruption and possible disorderly, is not entirely known yet. It is a natural process that happens but it has not been able to explain to the last detail. 
 
First we explain the concepts of eruption, emergency, exfoliation and timing of the eruption, and then describe the process of forming the teeth. 
 
Tooth eruption is the phenomenon of migration of the tooth since its formation instead of inside the jaw bone until it is placed in the oral cavity and perform their role in it. The emergency would be the time (encompassed in the process of the eruption) in which the tooth "breaks" the gum, and we can see it in the oral cavity (the eruption had already begun earlier). 
 
The exfoliation of teeth (in this case always refers to teeth) is the physiological fall when they have already fulfilled its function. Another tooth (which is permanent) will occupy its place in the dental arch. Before the fall of temporary tooth has already occurred to eliminating the root of the tooth, while the final tooth has been occupying the space that it has become and has built up his own roots. What falls is only temporary tooth crown, which is the only party that has not been absorbed, and then the permanent teeth a flora and end in a few months to form its root (about 24 until it completes the entire morphology apex root).
 
 There is a chronology of tooth eruption, ie, normally the changes in the dentition correspond to a chronological age. But this is not always true, and within limits is normal, like it is normal for children to grow or develop at different rates than others.
 
 As early as the sixth week of gestation appears in each of the two jaws (first in the jaw and then in the jaw), a linear structure called dental lamina, which is a thickening of the lining layer called ectoderm. The dental lamina to the top is continuing in a uniform, but after 10 thickening occur in the jaw and 10 in the jaw, which will correspond to the 10 teeth in each arcade. From here on the future teeth go through several stages of training with different morphologies features: 
 
Stadium outbreak or yolk: It's the one we described above. It formed several masses of cells from thickened spot in the dental lamina. 
Within each process jaw at each dental lamina, in areas beyond that of the 10 milk teeth, will be formed buds of permanent teeth that erupted after also at the back of the mouth area. 
 
Stadium cap: Now the formation of cells that constitute the outbreak takes the form of a hood, and is the organ of the enamel (which will result in this tissue). Under the cap, the cells differentiate and form the dental papilla, which is responsible for forming the dentin and pulp. Around the body of the enamel and the dental papilla, cells are arranged in a sac called the dental lamina or follicle, from which they form the cement and periodontal ligament. 
The whole body of the enamel, dental papilla and dental sac, is the tooth germ, which is already an outline of what will be the tooth. The word germ is used generically to refer to the teeth when they have not yet erupted. 
 
Attached to each tooth germ will be temporary begun to form the tips of each tooth standing, what will happen later on the same stadiums that the root of the tooth temporary, but more will be placed in the bone because of his rash is back in time .
 
 The bell: In its development, the body of the enamel is thinner and hollowed "and takes the form of a bell.
 Corona: Once you have organized perfectly bodies forming enamel and dentin, is beginning to produce these hard tissues (mineralized), and guesses and the morphology of each of the teeth that are being formed.
 It was subsequently form the roots and periodontium, in large part because coinciding with the processes of tooth eruption.