Fig. 4From: Influence of the bone graft materials used for guided bone regeneration on subsequent peri-implant inflammation: an experimental ligature-induced peri-implantitis model in Beagle dogsPhotomicrograph of a region of interest (Toluidine blue). a–c Original magnification view (Scale bar = 500 μm). The area inside the yellow box indicates the region of interest. d–f The white boxed depicts the tissue under high magnification (× 20, Scale bar = 50 μm). a, d Control, b, e autograft, and c, f deproteinized bovine bone mineral groups. *Residual bone graftBack to article page