The phenomenon of repercussion in the teeth

Under repercussive imply the propagation of pulses with nerves within the area of pathological focus on the nerves healthy areas, resulting in them may experience these or other functional disorders. Such transfer of impulses from one nerve to the other is possible due to the presence of anatomical communication between cells relevant centripetal nerves ( ganglia, sensitive nuclei, visual hill, the bark of the big hemispheres). "We must recognize, writes the academician.. K. M. Bykov (1944),that the process arising in any point of one hemisphere, is transmitted in a symmetric point to another hemisphere". Analyzing the clinical effect of some brain surgery, M. I. Astvatsaturov specifies that "the effectiveness of operations in some cases is due not local anatomical effects of nerve transection, and the fact reflected, repercussions change you are making a transaction in a Central mechanism innervation".
The phenomenon of repercussion was established in the teeth. So, for example, L. A. Zhukovsky, and X. Kornilov (1934) showed that after radical surgery on the maxillary sinus violation of elektrovozoremontnij teeth is observed not only in surgery, but also on the opposite side. It was noted, A. Shargorodsky (1967, 1969), and, more recently, I. Ya Marttel (1971).
Studying of cold and thermal sensitivity teeth before and after preparation under an artificial crown, M. M. Berman (1965) noted that in all cases, regardless of the mode of preparation thermal sensitivity change, and "not only prepared, but in the symmetric and remotely located teeth (on same and the opposite side of the jaw). The intact teeth, these changes were transient and passed through 5-10 days, uncut - longer..."
Along with repercussive a number of authors described peculiar phenomenon, which is that if the damage of peripheral nervous system on one side of morphological changes are detected in symmetric nerves on the opposite side. Thus, in the first 12-20 hours after injury simultaneously throughout peripheral cut the damaged nerve can be observed phenomenon irritation axial cylinders, which are expressed in the irregularity of their color, appearance of varicose thickening and vacuoles in the course of the nerve fibers. Similar developments could be observed in the fibers of the opposite side (B. S. Doinikov, 1922, 1955; B. I. Lavrent'ev, 1939; S. S. Weill, 1944, and others). This phenomenon should be called "indegenerate" (by analogy with the common terms "synesthesia", "Sinergia", "synkinesia"). Integeration changes in the nerves of the teeth described by many authors.
C. A. Kuritsyna (1959) was applied rabbit injured nizhnelenskoe nerve and after 24 h watched increased argentophile and varicose thickening of nerve fibers in the teeth on the opposite side. According to her, these phenomena are completely liquidated 30-45 days after injury. Similar experiments were delivered and A. Shargorodsky, (1967). Fractures of the lower jaw in laboratory animals in large parts of the nerve fibers of the pulp of teeth opposite side in the first days after the injury found increased argentophile, varicose thickening, uneven impregnation. After 6 days a part of the nerve fibres subjected to fragmentation. Along with changes in the nerve fibers was observed stagnation in the blood vessels, and later and net atrophy of the pulp.
X. of Shpakov (1965) cut the puppies on the one hand nizhneangarsky nerve and scored animals-after 4 months 27 days. Histological examination semilunar site neoperabelny side he saw reactive changes of nerve cells, such blanching and scattering degraidng granules.
In the above experiments, I. A. pigaleva and 3. G. Kuznetsova, p. P. Astanina, and L. I. kaushansky trophic disturbances in the soft tissues of the face and teeth noted by the authors on the side damage branches of the trigeminal nerve and neoperabelny side.
All the above indicates that indegenerate changes in the trigeminal nerve is a widespread phenomenon. Symmetric caries, perhaps,is one of the manifestations of this phenomenon.