Oxidoreductase activity in the pulp of replanted and autotransplanted teeth in young dogs

The purpose of the present investigation was to assess the vitality of the pulp of the replanted and autotransplanted teeth with incomplete root formation by means of histochemical demonstrated of oxidoreductase activity during a 180-day period. Staining for enzyme was seen in the whole pulp during the first postoperative days. After 10 days, staining was observed only in the foraminal area of the pulp and in blood vessels in apparently necrotic tissue. Thirty days postoperatively staining was observed in the whole pulp; 180 days after replantation or autotransplantation six out of eight teeth exhibited enzyme activity in the entire pulp. Thus, it appeared that the pulp of the replanted and autotransplanted teeth with partly formed roots underwent necrosis and that the dead tissue was replaced by new tissue.