Figure 6. Photomicrographs of a nonexposed site in the CM group. (A, B) Polarizing photomicrographs. (B, C) Higher magnification views of the boxed area in A. Collagen membrane did not prevent the infiltration of tissue fiber through the pores. Hematoxylin-eosin stain; scale bar (A) = 2 mm, (B,C) = 500 µm, respectively. G, gingival tissue; P, pore; PS, pseudoperiosteum.
