Figure 2. Photomicrographs of sections of mandibular condyle stained with safranin O. (A) Normal rabbit; (B) non-functional side of TMJ 3 wks after unilateral removal of teeth; (C) functional side of TMJ 3 wks after unilateral removal of teeth; (D) non-functional side of TMJ 6 wks after unilateral removal of teeth; and (E) functional side of TMJ 6 wks after unilateral removal of teeth. F, fibrous layer; PC, pre-chondroblast layer; FC, functional chondroblast layer; and HC, hypertrophic chondroblast layer. Arrows: safranin O staining with an intensity obviously higher than normal. Bar = 80 µm.