Figures 7–9. Figure 7. Occasionally β-tricalcium phosphate (β-TCP) graft particles protruded superficially toward the soft tissues (original magnification ×40). Figure 8. Numerous soft connective tissue invasions from the surface toward the center of the defect were observed in the β-TCP group specimens, red arrows (original magnification ×25). Figure 9. Ungrafted site: incomplete bone formation near the native bony walls with restoration of the outer cortex (original magnification ×10).