Fig. 2From: Immunohistochemical analysis of soft tissue response to polyetheretherketone (PEEK) and titanium healing abutments on dental implants: a randomized pilot clinical studyHematoxylin-eosin staining, elucidating the presence of the inflammatory cells dominantly in subepithelial tissue (3a,3b). Intraepithelial presence of several inflammatory cells was observed in Fig. 3b, as highlighted by the yellow arrows. HE × 400 magnificationBack to article page