Fig. 7

After illumination of the ROI with a wavelength of 370 nm, the fluorescence of tetracycline in the bone matrix is shown. The arrow marks a “very high” intensity, “5” as numerical value. The slice of preparation 133 belongs to a CSA implant after 12 weeks of healing, so that the intensity can be seen as activity of bone maturation at the 65th postoperative day. The stars mark the implant surface which is here exemplarily in contact to the bone matrix