Section 1-6. Construction of teeth as the bilaterally-symmetric structure

Our teeth are bilaterally arranged symmetrically in our mouth. Is there any significance of such symmetrical locations of teeth? Are there any functional meanings related to “Hazo (Teeth-organ) theory” hidden behind them? Concerning physical chewing ability, extraction of teeth only from one side theoretically results in reduction of their functions by 50 %; however, how is the influence in terms of internal information emitting functions associated with the organ theory? We are wondering whether only half of the functions are reduced in similar manners as those of chewing functions, or any other influences occur. These are also interesting points for us to note.
Let’s conduct one experiment. For example, we shall anesthetize one submaxillary back tooth on the right side and ask the subject to bite something with this anesthetized tooth. Naturally, the subject cannot recognize biting something because the right jaw is paralyzed and accordingly, salivary secretion is not changed. Unless anesthetized, chewing something with back teeth causes secretion of saliva. As the next experiment, the left jaw is anesthetized and the subject is asked to bite something with the opposite side teeth (right side). The right side teeth (not anesthetized side) perceive chewing whereas the left side jaw is paralyzed. What happens? Salivary secretion is prohibited. Even if the opposite side is anesthetized, chewing with intact teeth does not induce salivary secretion. Namely, our brains distinguish difference of both side teeth and such difference is well treated. For example, in case of a certain marathon runner running up the steep slope while gritting his teeth, salivary secretion does not occur. This is because the signals transmitted from bilateral teeth are treated in brain where it is recognized that “The present signal is not attributed to stimulation due to chewing something”. As the results, unnecessary salivary secretion is not caused.
Taking into account the function of “Hazo (Teeth-organ)”, extraction of one tooth indicates a possibility to provide a great damage on a package of teeth. In more details, bilateral teeth play a combined role. For example, when we walk on foot, a single leg cannot achieve smooth gait and a pair of legs permits walking and running. Similarly, bilateral teeth cooperate each other to achieve their responsibilities.
Figure 18 in the previous Section 3 suggests such a bilateral teeth function. Namely, the reduction ratio of functions in the cases with all the teeth being lost is equivalent to those in the cases with unilateral loss of teeth. Shall we verify this fact by referring to blood pressure? Please look at Figure35.In this figure, the minimum blood pressure is compared in the following cases (0) no loss of maxillary first bicuspid characteristic of sympathetic nerve features, (1) one loss, and (2) two losses. As is obvious from Figure 35, no difference was observed in the diastolic blood pressure between one loss and two losses. On the other hand, in the case with two complete teeth, the diastolic blood pressure was significantly higher than those in the above two cases with P＜0.001.



figure35
Pair effects of teeth according to blood pressure changes
In this graph, the number of lost teeth [0] denotes that both of these two teeth remain; [1] means that one tooth is extracted while [2] denotes that both of these teeth are lost. If one tooth out of the paired teeth is lost, the similar changes in blood pressure are observed like those after lost of two teeth.