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Figure 6. Photomicrograph of a sagittal section through the head of the mandibular condyle ( human, aged 10–12 yrs, the age when functional appliance treatment is usually started). There is some evidence of endochondral ossification, but chondrogenesis itself does not appear to be particularly active. IJS, inferior joint space; AZ, articular zone; PZ, proliferative zone; CC, condylar cartilage. Hematoxylin and eosin stain. Original magnification, 20x. Scale bar not available.
