Figure 1

Histologic images of inflammatory cell infiltration at the end of implanted tubes and ingrowth of granulation tissues inside the tubes in control and MTA groups (hematoxylin-eosin staining). (a) Highly vascular, moderately inflamed granulation tissue (G) at the dentine tube end (D) in the control group at 7 days; original magnification × 50. (b) Ingrowth of inflamed granulation tissue (I) inside the lumen of the tube in the control group at 7 days. Space previously occupied by dentine tube end is represented by (S); original magnification × 100. (c) A thin fibrous capsule (FC) surrounding the empty dentine tube (D) at 30 days; original magnification × 200 (d) Ingrowth of inflamed granulation tissue (I) inside an empty dentine tube (D) at 30 days; original magnification × 200. (e) Very mild inflammation observed in some cases of the control group at 60 days, in which lymphocytes (L) were the predominant cells; original magnification × 400. (f) Active angiogenesis with inflamed granulation tissue at the area in contact with MTA at 7 days. Multinucleated giant cell with engulfed MTA (GM); original magnification × 200. (g) Necrosis in the area adjacent to MTA material (M) at 7 days; original magnification × 200. (h) Mild inflammatory reaction in an MTA specimen at 30 days; original magnification × 400. (i) Suppuration (SP) observed in the area adjacent to MTA material (M) at the tube at 30 days; original magnification × 50.