Abstract
Porous implants are dental implants provided with porous alumina ceramic roots having a porosity of 35% and an average pore diameter of 130μm were placed in the mandible of Japanese Monkeys(Macaca fuscata). After sacrificing animals periodically, at 4 and 12 months, new bone formation in the pore spaces was investigated by scanning electron microscope.
Results
All the implants showed a high degree of stability, throughout the experimental periods under occlusal stress. Bone ingrowth into the ceramic pores was observed in all the specimens.Scanning electron micrographs of porous layer were characterized by interconnecting three dimensional pore structures and micropores of poly-crystalline alumina. As a results of this experiment, interlocking effect divided into two regions, bone ingrowth to root pore spaces and the micro anchoring with bone to micropore structures.
