Evaluation of the interface between immediately loaded micro-implant and bone

Objectives: To study the peri-implant bone reaction of the immediately loaded micro-implant. Methods: Micro-implants were implanted into dogs' mandibular bones, immediately loaded, with polyfluorochrome sequential labeling. Seventy-three days after implantation, the dogs were euthanized and sections of mandibles were prepared. The specimens were evaluated by light microscope, fluorescent microscope, polarized light microscope, microradiography, scanning electron microscope and energy dispersive x-ray spectroscope. Results: All the inspections suggested that osseointegrated interfaces were formed between micro-implants and bones. Fluorochrome labels hinted that lamellae bones appeared 6 weeks after implantation, and were formed more extensively another 3 weeks later. Conclusions: Micro-implants can be loaded immediately and the interfaces have normal turnovers of osseointegration.