Abstract
To study the bone interface around implants and microcirculation, we placed All Dimple System Implants (ADS) in the mandibles of beagle dogs. Superstructures were attached and occlusionpermitted for 9 months. Specimens of microvascular resin casts with bone tissue were prepared and examined using scanning electron microscopy (SEM). We found that tissues in contact with the implant consisted of bone (interface bone) and small masses of fibrous connective tissue. These masses contained a few capillaries having a characteristic structure and configuration. Some lacunae resulting from bone resorption (Howship's lacunae) were seen on the surface of interface bone adjacent to the small masses of fibrous connective tissue. In contrast, Howship's lacunae were not present on the surface of interface bone that lacked blood vessels. The interface as a whole had very few blood vessels.
Behind the interface bone, i.e., on the marrow side, were dense areas of closely intertwined, characteristic capillary networks. Numerous Howship's lacunae were found on the surface of interface bone at this site.
Our results indicate that the thickness of interface bone is controlled on the bone-marrow side. Once formed, the rate of metabolism of interface bone is very low. The inability of tissue to rapidy adapt to environmental changes is suggested by characteristics of microcirculation. J. Jpn.Soc. Periodontol., 43: 43-51, 2001.
