Figure 7. Methylene blue/acid fuchsin staining of the implants with porosities of 0%, 30%, and 50% implanted into the rabbit femoral condyle after (A-F) 4 weeks and (G-L) 12 weeks. The new bone tissue is dark red, the original mineralized tissue is red, the osteoblast nuclei are dark blue, the cell matrix is light blue, the osteoid is blue-violet, and the implant is black. (A-C) Images under low magnification at week 4. (D-F) Images under high magnification at week 4. (G-I) Images under low magnification at week 12. (J-L) Images under high magnification at week 12.