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We observed in eleven dogs the blood flow in the alveolar bone during the tooth movement with the bone scintigraphy for one year. Additional we used for histological evaluation polychrome sequence marking and for improving of therapy electrostimulation. There is a correlation between tooth movement and blood flow. Four to six weeks after beginning tooth movement and blood circulation are reduced although the applied force was continuous all the time. This is an advice for stress interruption during treatment. Electrostimulation improves the conditions for tissue regeneration because the lifetime of osteoblasts is prolonged.

The authors present the results from the investigation of 414 full-mouth X-rays from periodontally diseased individuals for the occurrence of visible bone canals. The frequency, the form the most frequent location and the age-distribution of the vascular canals as well as the possibility of classifying them according to type and severity of the periodontal disease are discussed. Follow-up examinations in 18 patients, on an average 15 years after the first examination, permit the conclusion that the bone canals cannot be influenced by periodontal treatment, and that they are not associated with the periodontal disease.

A new classification of the angioarchitecture and blood flow is proposed in light of the results of vital microscopy studies of the windowed periodontium and gingiva of the incisors of rats. The flow pattern and the rate of blood flow are different in different vessels. The flow of blood in segmented and interconnected arterial and venous vascular sections in the alveolar and marginal periodontium corresponds to what is known as systemic circulation, whereas that in arterioles, capillaries, and venoles must be considered as belonging to what is referred to as microcirculation. Subepithelially, the microcirculatory elements constitute a nutritive, typically ordered capillary network as contrasted with the random spatial arrangement of capillary loops in the alveolar periodontium. Numerous anastomoses provide the basis for possible functional adaptation, leading to the formation of polygonal ring closures in the alveolar region. The interpretations of functional findings are based upon histotopological reexaminations.

Morphological changes in the mouth due to age, e.g. changes in the oral mucosa, the blood supply of the lower jaw, and the nervous system, make variations of prosthetical therapy necessary. By means of a classification of old-age patients, the significance of such variations for the prosthetical treatment of partially edentulous jaws is demonstrated.