Fig. 1From: Hypoxia-inducible factor expression is related to apoptosis and cartilage degradation in temporomandibular joint osteoarthritisCondylar cartilage degeneration in rat models. Representative images of the first molar occlusion relationship in control and OD rats. H&E staining A (Ca: cartilage; Sb: subchondral bone; small superficial clusters is indicted by an “ → ”; fissures is indicated by an “*”) and Safranin O and fast green B analyses of glycosaminoglycans (red) in sagittal sections of the TMJ mandibular condylar cartilage layers. Scale bars: 50 μm. C Mankin scores and OARSI scores D in the control and OD groups. *P < 0.05, ***P < 0.005, ****P < 0.001. N = 6–8Back to article page