Fig. 6

a, b After 3 weeks of treatment with COX-2 inhibitor, the bone area of cortical density (≥ 180 mg/cm³ HA) in the tunnel aperture section was significantly smaller than in the controls. c, d At the 6 weeks examination time point (i.e., 3 weeks after the last administration of COX-2 inhibitor), the cortical bone area in the COX-2 inhibitor group was larger. In the control group, a reduction of the cortical bone area was found