Histopathological Evaluation of Interproximal Gingival Tissues after Initial Preparation

Abstract

We did light and electron microscopic observations of interproximal gingival tissue to clarify which cases require surgery after initial preparation. The samples were biopsies from adults who had undergone initial preparation. While the gingiva exhibited no macroscopic signs of gingivitis, a certain degree of inflammatory infiltration remained under the junctional epithelium even after the initial preparation. On the other hand, infiltration was localized and formation of new collagen was seen in some areas. Furthermore, the pocket epithelium reattached coronally to the planed root surface. These results suggest that periodontal surgery might not always be required after initial preparation.