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A-C SEM images of alkaline heat-treated implants 12 weeks postoperatively at magnifications of (A) 150×, (B) 8500×, and (C) 34,000× are shown. Spikes are visible on the surface of the implant 12 weeks after implantation (white arrows); osseous material (black arrows) is evident and intimately associated with these spikes (open white arrows).
