Figure 3.

Histological images with hematoxylin and eosin stain. (a) Bone graft with no membrane at 2 weeks. New bone formation level is below the adjacent bone margin, and there is soft tissue invasion; (b) bone graft with the collagen membrane at 2 weeks. Elevated bone level is noted with the collagen membrane; (c) bone graft with the GEL/TSG film at 2 weeks. Presence of the GEL/TSG film and elevated bone level is observed; (d) bone graft with no membrane at 4 weeks. Thickened connective tissue over newly formed bone is observed; (e) bone graft with the collagen membrane at 4 weeks. Degeneration of the membrane and more advanced maturation of newly formed bone are observed; (f) bone graft with the GEL/TSG film at 4 weeks. Maturation of newly formed bone is observed. Degeneration of the film is noted.