抄録
Disuse mandibular osteoporosis caused by chronic marginal periodontitis were reported here. And these osteoporosis could be classified into 4 types such as speckled or spotty, linear bands, generalized or diffused, and geographic or combination type.
Chronic periodontitis can make changes or cementum and periodontal ligament, morphologically and functionally. And then the phygiological stimulation such as mastiocatory forces would not be transfered to mandibules.
The disuse osteopososis would be observed in many cases, when the mandibular bodies could not be stimulated by these forces for a long time. In most cases reported here, the cancellous tissues of the mandibules were so porous that periodontal probe could be inserted into the tissue. We are focussing the examination of the mandibular body as well as alveolar bone when chronic marginal periodontitis is diagnosed.
