Neurohistologic and histochemical changes in the teeth and parodontium were studied in 36 dogs in the course of the preparation for mental-ceramic crowns. It was established that grinding of hard tissues produced reactive and degenerative changes in vessels and nerve elements of th teeth and peridental tissues, as well as in the content and distribution of the pulp RNA, glycogen and hyaluronic acid. The changes were maximum pronounced 1--3 days after the intervention. Analogous changes were also seen in the teeth which were prepared to form an orbicular projection. Histomorphologically, the teeth and parodontium returned to normal 35 days after the experiment.
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