STUDIES ON PERIODONTAL DISEASES : Part I. Evaluation of Russell Scoring System for the Expression of Periodontal Diseases

概要

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For the purpose to reveal the relation between the oral symptoms in periodontal disease and the systemic facto rsrepresented by clinico-chemical tests, an attempt was made to find out a more precise index for periodontal symptoms based on the Russell scoring system.<BR>The periodontal index suggested by Russell appeared to have a great significance for epidemiological study of periodontal disease in population as compared with other scoring method. In Russell index, however, the total prevalence of periodontal disease is materially underestimated as pointed out by Ramfjord who attributed its reasons to inadequate examination procedures, or the igorance of the intensity or extension of periodontal disease. Therefore, the trial was made to improve the incompleteness involved in Russell index and consequently new two indices were introduced: one is“Intensity index”, the other is“Extension index” as beeing defined by the author as follows.<BR>Total scores on the individual person was computed similarily as the Russell's index method. The total sum divided by the numbers of the suffering teeth gives“the intensity index”, while the numbers of suffering teeth divided by the numbers of teeth examined makes“the extension index” .<BR>Using new indices and the original Russell index together, it becomes more clearly and easily to classify various types of clinically complicated periodontal symptoms.