Figure 6.

Histological examination of the bone–screw interface between groups. The specimens were stained with Sanderson’s Rapid Bone Stain and then counterstained with acid fuchsin. Figures (A–D) represented the controlled screw from scale of 12.5×, 40×, 100×, and 200×, respectively. The surface of the controlled screw was sharp and healed with fibrous tissue at the tip of screw thread. The AMD screw group (E–H) exhibited a rougher surface and superior bone–screw integration on the screw surface and inside the screw body. Line arrows indicate fibrous tissue healing at the tip of the control screw thread; B: bone, S: screw.